It is known that the effect of traditional agricultural techniques of burning farmland such as paddy fields and fields gradually declines and affects both the fauna and flora of the rice paddy as well as pests. Therefore, in this study, a study was conducted to investigate the effects of burning rice paddy fields and rice paddy fields levee on the control effect of winter pests inhabiting agricultural land and the amount of pests generated and damaged during the growing season. As a result of this study, the pest control effect of incineration reduces not only the density of pests, but also beneficial insects (natural enemies) and non-reptiles. It is judged that burning has a very low insect control effect. It is expected to be used as basic data to create a sustainable agricultural environment, such as minimizing various negative effects such as pest control effects, wildfires, and air pollution caused by incineration, and suppressing unnecessary incineration and fine dust generation.

진화론의 등장은 아담의 역사성과 타락 그리고 원죄 교리에 대한 의문을 불러일으켰다. 프레드릭 테넌트는 자연과학의 연구결과를 수용하면서 죄의 기원에 대한 새로운 설명을 시도한 선구적인 신학자였다. 그는 진화의 결과로 인간이 타고나는 동물적 본성에 도덕적 판단을 내리는 것은 부적절하다고 본다. 그에 의하면 인간이 죄를 짓는 것은 타고난 악한 본성의 필연적인 결과가 아니라 인간 내면에서 서서히 등장하는 도덕적 의식이 동물적 본능을 제어하지 못하는 데서 기인한다. 테넌트가 추구한 것은 기독교 신앙의 파괴가 아니라 현대의 학문적 성과에 비추어 기독교 지식 체계를 재정비하는 것이었다. 그는 자신의 이론이 기독교 신앙의 본질적 내용과는 관계되지 않는다고 강조했다. 죄의 기원과 무관하게, 자범죄의 보편성은 구원의 복음의 충분한 근거가 되기 때문이다. 테넌트의 관점은 세계에 대한 지식이 진보하는 것과 마찬가지로, 계시에 대한 인간의 지식 또한 전진한다는 점을 상기시켜 준다.

본 연구는 초등교사 양성대학 정체성의 본질적 의미를 탐색하였다. 이를 위해 연구자는 자신의 개인적 경험으로부터 문제의식을 도출하고, Mead의 자아이론을 통해 교사 정체성 형성 과정을 3단계로 구분함으로써, 양성대학의 기본 역할이 예비교사가 가진 [학생의 관점]을 [교사의 관점]으로 원활하게 전환시켜 주는 데 있음을 드러내었다. 그리고 그러한 전환은 양성대학의 교육과정 중 교직과정을 통해서 가능하며, 이때 교직과정은 구체적으로 예비교사가 10개 교과에 대한 ‘비판적 안목’을 갖추도록 하는 기능을 한다. 특히, 이러한 사실은 교과의 학문적 목적 그 자체보다 아동 발달을 고려하여 교과를 가르쳐야 한다는 초등교육적 가치에 부합한다. 그리고 그것은 초등교사의 역할, 교육대학의 목표로서 학급담임제라는 교직체제의 중요성을 드러내준다. 따라서 교육대학 교 직과정 프로그램은 이러한 요소를 반영하여 교육과정을 재구성할 필요성이 있다. 그리고 무엇보다 중요한 것은 해당 연구가 (예비)교사들의 교사 양성 과정 그리고 교직발달에 대한 요구와 필요로부터 시작되었으며, 앞으로 초등교사 양성 프로그램은 이를 적극 반영하는 방향으로 나아가야 한다는 점이다.

The physicochemical properties of soil and the yield and quality of rice (Oryza sativa L. cv. Sailmi) were assessed using Italian ryegrass (Lolium multiflorum Lam. cv. Kowinearly)-rice double cropping systems in the paddy fields at Goseong and Miryang in southern Korea. The average temperatures during the ripening period were approximately 1 °C higher than the optimal temperature for rice ripening and the sunshine duration was reduced by frequent rainfall. Consequently, it was slightly below the optimal conditions required for rice ripening. In the soil at Goseong, winter Italian ryegrass cropping increased the pH, electrical conductivity, and the contents of organic matter, total nitrogen (T-N), available P2O5, K, Ca, and Mg than winter fallowing. Particularly, the contents of T-N and available P2O5increased significantly. In the soil at Miryang, Italian ryegrass slightly increased the electrical conductivity and the T-N, Mg, and Na contents. Therefore, winter Italian ryegrass cropping improved the physicochemical properties of paddy soils; however, Italian ryegrass-rice double cropping slightly reduced the culm length at both Goseong and Miryang, without markedly changing the panicle length or number compared to fallow-rice cropping. Furthermore, at Goseong, Italian ryegrass-rice double cropping slightly decreased the spikelet number and milled rice yield, and increased the ripened grain rate; however, at Miryang, contrasting results were observed. In addition, fallow-rice cropping revealed no differences in the head rice or opaque rice rates. The protein content was slightly increased in Italian ryegrass-rice double cropping, without significant changes in the amylose content or Toyo value, compared to that in fallow-rice cropping. The peak and breakdown viscosities were slightly decreased. These results indicate that winter Italian ryegrass cropping might alter rice taste but may not exhibit remarkable negative effects on rice cultivation. Therefore, Italian ryegrass-rice double cropping system is recommended for paddy fields in southern Korea. Nevertheless, to increase the rice yield and quality, fertilization standards for rice cropping that consider the changes in the T-N and organic matter contents in paddy fields caused by winter Italian ryegrass cropping need to be established.

교육이론과 실행 간 격차는 오래전부터 논의되어 왔으나, 본 연구에서는 이론과 실행 간 관계속에서 이론의 역할에 대한 논의가 충분하지 않다고 판단하였다. 이에 이론의 영역을 과학교사의 내용 지식(SMK: Subject Matter Knowledge)과 교수내용지식(PCK: Pedagogical Content Knowledge)에 한정하여, 이와 관련된 기본 개념을 재구조화하고자 하였다. 이를 위해 문헌연구를 기반으로 연구문제와 관련된 내용을 정리하고, 가설적 제안과 가설 검증을 위해 필요한 실증적 연구도 함께 제안하였다. 첫째, 교과 내용 지식을 학생이 알아야 할 지식과 상위지식으로서 교사가 알아야 할 지식으로 나누고, 교사가 알아야 할 상위지식의 유형을 제시하면서, 이러한 상위지식이 교사의 수업 실행과 연결되기 위해서는 상위지식도 학생지도를 위해 직, 간접적으로 역할을 할 수 있어야 한다는 점을 강조하였다. 둘째, 심리학의 체화된 인지(embodied cognition) 이론에 기초하여, 교사의 지식이 상황에 맞추어 적절하게 변형되면서 즉각적으로 실행되려면 체화된 PCK (embodied PCK) 개념이 필요하다는 점을 제안하고, 체화된 PCK의 특징과 과학교사의 수업 실행에서 이것이 어떠한 역할을 하는지 논의하였다. 마지막으로 PCK와 체화된 PCK를 포함하여 이론 과 실행 간 관계를 강조하는 새로운 PCK 모델을 제안하고, 그 특징을 논의하였다. 본 연구에서 제시한 논의와 가설적 제안 및 실증적 연구의 제안은 이론과 실행 간 관계 속에서 이론의 역할과 기능에 대한 보다 깊은 이해에 도움을 줄 것으로 기대되며, 나아가 이론과 실행 간 조화를 위한 기반을 제공할 것으로 기대한다.

이 연구는 가상현실 기반의 음악교육 콘텐츠를 개발하고, 그 효용성에 대하여 논의하는 것을 목적으로 한다. 이 연구에서는 교원학습공동체 소속의 교사 8명이 가상현실에 기반을 둔 가창학습 콘텐츠와 뮤지컬 공연 콘텐츠를 제작하는 과정에서 나타난 효용성과 자신이 겪은 경험에 대하여 논의를 한다. 이 연구에서 개발된 가상현실에 기반한 가창학습 콘텐츠의 특징은 첫째, 온라인 교수 환경에서도 모델링과 피드백에 유용한 콘텐츠이다. 둘째, 가상현실을 활용한 교수 환경을 통해 시 공간 개념을 확장하였고 전통 교실에서 어려웠던 1대 1 교수학습 환경을 제공한다. 셋째, 클라우드 기반의 모바일 교과서를 제공함으로써 학생들이 자기 주도적으로 학습할 수 있도록 설계되었다. 또한 교원학습공동체를 통한 콘텐츠 개발과정에서 나타난 교원들의 경험과 실천에 대한 논의의 결과는 다음과 같다. 첫째, 학습콘텐츠의 제작 과정에서 교사들은 시행착오 및 반성적 성찰을 통해 교사전문성이 성장하는 것으로 나타났다. 둘째, 교육콘텐츠 제작 후 공문 및 다양한 채널을 통해 나눔을 실천함으로써 교육크리에이터로서 보람과 긍지를 느꼈다. 셋째, 교원학습공동체의 자발성과 비전의 공유는 콘텐츠 제작을 위한 학습 참여에 긍정적인 요인으로 작용하였다. 콘텐츠의 개발 과 효용성에 관한 논의는 비대면 온라인 시대 음악교육의 발전을 위해 큰 기여를 하리라고 본다.

We examined the impact of paddy wetland's avian-diversity on the development of the protected horticulture complex. The results of this study were made to propose ecological protected horticulture complex and development direction suitable for avian habitat. The total number of species surveyed was analyzed as 1168 individuals in 11 orders 26 families and 36 generic 48 species. Type average was analyzed as paddy 17.25±4.83 species and 74.50±38.08 individuals, glass 10.00±0.82 species and 46.75±2.06 individuals, single 13.75±7.27 species and 59.50±35.34 individuals, multi 8.75±0.96 species and 36.75±9.29 individuals. Paddy showed higher species diversity than protected horticulture complex. The average number of species surveyed for one year was glass 14±2.83, multi 12±1.41, single 18±11.31, and paddy 26±11.31. The diversity difference was identified as paddy> single> glass and multi. Statistical analysis showed statistical difference of Ciconiiformes. Development of protected horticulture complex causes loss of avian habitat. The diversity index was glass 1.73±0.07, multi 1.68±0.14, single 1.91±0.47, and paddy 2.29±0.17. Paddy has a higher species diversity than the protected horticulture complex. For the purpose of ecological protected horticulture complex, detention ponds, artificial wetlands and habitats should be reflected in the design. This should be applied to reclamation areas or large-scale protected horticulture complexes.

선행연구의 후속연구로 기획된 이 글은 보편 바흐(Bach, the universal)이라는 이미지를 논의의 중심에 두고 있다. 특별히 이 글이 주목하는 것은 보편 바흐라는 이미지가 1980년대 후반 영미권의 새음악학(new musicology)과 함께 등장하였고, 새음악학 담론과 교차되면서 새로운 담론을 형성해냈다는 점이다. 새음악학의 대두와 함께 보편 바흐의 이미지가 어떤 방식으로 도전받고, 변화하고, 또는 변화하지 않았는지 살피기 위해 이 글은 보편바흐를 주장한 로버트 마샬, 새음악학적인 시선으로 보편 바흐를 반박한 수잔 맥클러리(Susan McClary), 그리고 보편 바흐의 이미지를 근대라는 새로운 창으로 검증해나간 존 버트(John Butt) 등의 논의를 분석하고 비판한다. 그리고 최종적으로 근대와 바흐라는 사고가 21세기 한국의 바흐담론(또는 서양음악담론)에서 함의하는 바는 무엇인지 질문한다.

Background : Recently, the shortage of first planted ginseng field has increased direct seeding cultivation in paddy. Therefore, the demand for the development of ginseng varieties suitable for direct seeding cultivation in paddy has increased. So the aim of this study was selection ginseng varieties and germplasms suitable for direct seeding cultivation in paddy. Methods and Results : We used 13 varieties and 191 lines of Korean ginseng (Panax ginseng C. A. Meyer) in this study. Ginseng Seeds were harvested at the end of July 2013, sown in mid-November, and were grown for four years in paddy. In 2017, the survey was conducted on 27 items of growth characteristics in accordance with the standards for survey of ginseng variety, and the degree of diseases and physiological disorders. Among ginseng varieties, the growth of Gopoong, Sunwon and Gwumjin were excellent. However, the incidence of physiological disorder was low in Gumpoong and Geumsun. Among the genetic sources, the growth of 7 ginseng lines, such as G04092, G04098, M05015, G07053, G10069 and G10093, were excellent. However, the incidence of physiological disorder was low in 10 lines of ginseng, such as G04020, G04061, G04081, G04092, G05054, G07052, G07053, G10069 and G10093. Conclusion : This result suggests that 5 varieties and 10 lines of ginseng showed outstanding growths in paddy. In the future, we will review the characteristics of root and the content of ginsenosides of ginseng variety and elite lines.

Background : Atractylodes macrocephala is a perennial herbaceous plant belonging to the family Asteraceae and should be cultivated in field soils with good water dripping due to plant characteristics. However, cultivating farmers mainly have recently been cultivated in paddy soil due to their regional characteristics, which causes the decrease in yield due to poor drainage. Therefore, this study was carried out to investigate the cultivation in high ridge and subsoil breaking effect for stable paddy soils cultivation technology of A. macrocephala. Methods and Results : Soil was paddy soils in the fall of 2017, and the pH (1 : 5) was 6.61 ± 0.15 as a result of chemical and physical properties. EC was 0.49 ± 0.05 dS/m, and organic matter content was 28.69 ± 69 g/㎏ and effective phosphoric acid was 306 ± 17.8 ㎎/㎏. As a result of the soil layering survey, the surface layer was 0 - 26 ㎝ deep as paddy soil mounded with sandy loam in the past. In the surface layer, there was a light layer after 17 ㎝ depth, and volume density was 1.71 ± 1.3 g/㎤. The porosity of the plow pan was 33.41 ± 2.34%. The cultivation methods were cultivation in high ridge (30 ㎝ or more) and level row (10 ㎝ or less) at 2 levels and 3 repetitions. In subsoil breaking, the depth of the plow pan was increased from 17.1 ± 0.5 ㎝ before treatment to 31.1 ± 3.6 ㎝ after treatment and the hardness was 24.8 ± 1.5 ㎜. In the case of rotary plowing, the depth of the plow pan was 17.1 ± 1.9 ㎝ before treatment and 26 ± 2.4 ㎝ after treatment and the hardness was 25.8 ± 2.9 ㎜. The medium growth characteristics of A. macrocephala per treatment showed the tendency of increase in plant length, culm length, number of nodes, number of leaves, and fresh weight in level row cultivation after subsoil breaking. Root growth of cultivation in high ridge after subsoil breaking tended to be good with rhizome weight of 11.6 g per hill. The survival percentages were 98.8 - 100% and the bolting rate was 93.4 - 96.2% Conclusion : In cultivation in high ridge after subsoil breaking in the paddy field of Gangwon area, the decrease of yield of A. macrocephala due to drainage was expected to be alleviated, but final conclusion should be drawn after analyzing soil temperature and soil moisture data.

Background : The insufficient soil moisture due to spring drought causes the germination rate of ginseng seeds to be remarkably lowered and the low seeding depth causes the roots not to be settled but remain in the surface soil containing moisture, resulting in the ill-shaped ginseng. Especially, in the case of paddy soil, the soil environment is often over-humidified or over-dried, resulting in high rate of occurrence of physiological disorders such as rough skin, yellow-colored root and red-colored root, etc. compared to the upland soil, requiring more care in managing the soil. Therefore, this study was conducted with the aim to investigate the effects of stamping treatment on the direct seeding cultivation in the paddy soil and to investigate the survival and growth characteristics according to the seeding method. Methods and Results : We investigated the effects of stamping on the emergency rate and growth by using rollers (15, 20, 25, 30 ㎏), and also investigated the growth characteristics according to the direct sowing methods (broadcast planting, motorized seeder, semi-automatic seeder, manual seeder, hoop-type seeder). In the emergency rate of 1-year-old ginseng group directly sowing and treated with trampling, the group treated with 25 ㎏ & 30 ㎏ showed the highest emergency rate & growth, and above-ground & underground parts growth of 1-year-old ginseng by sowing method, there was no significant difference between sowing methods, the emergency rate of motorized seeder and semi-automatic seeder was high. Conclusion : In the paddy soils, the 25 – 30 ㎏ stamping after direct seeding showed superior above-ground growth and emergency rate, and there was no significant difference in growth, but motorized seeder and semi-automatic seeder had a higher rate of emergency in 1-year-old ginseng.

Protected horticultural complexes would increase crop productivity but would adversely affect the groundwater recharge function in the area because the impervious area would increase. Further, they would limit the movement of living beings, affecting biodiversity. Therefore, this study evaluated the groundwater ecosystem services provided by protected horticultural complexes in terms of consistent utilization of water. The estimated amounts of groundwater loss obtained through quantitative assessment of groundwater infiltration showed that a higher impervious area results in higher losses. We, therefore, predict a much higher loss if similar changes in land use are realized on a nationwide scale. A plan to promote groundwater recharge in impervious areas is actively being discussed for urban areas; however, this plan is not yet applicable to farming areas. We consider it is essential to develop groundwater infiltration facilities for horticultural complexes, infiltration trenches, permeable pavements, surface water storage facilities, water purification facilities, etc. Further research and development of groundwater infiltration facilities is important for consistent utilization of water and the improvement of ecosystem services.

본 연구는 왕우렁이의 생리․생태적 특성 및 논 잡초방제를 위하여 투입된 왕우렁이들의 집단패사 원인을 구명하기 위하여 수행하였다. 1983년 국내에 도입되어 양식과 논 잡초방제를 위하여 활용되고 있는 왕우렁이의 종(species)은 연체동물문(Mollusca), 복족강(Gastropoda), 중복족목(Mesogastropoda), Ampulariidae과, Pomacea속에 속하는 Pomacea canaliculata Lamarck이다. 왕우렁이의 생리․생태적 특성조사 결과 왕우렁이 성체들이 국내에서 월동되고 있으나 왕우렁이 알로는 월동되지 못하고 있다. 수컷과 암컷의 비율은 1:1.99~2.33배로 암컷의 구성비가 높았다. 생장량은 1일에 87.7 mg이었으며, 껍질은 각고가 0.31 mm, 각경이 0.33 mm씩 자랐다. 왕우렁이의 생장은 먹이의 조건 등에 따라서 차이가 있을 수 있으며, 매우 빠른 생장량을 나타내었다. 한편, 건조에 대한 저항성은 매우 강하여 3개월까지 생존율이 약 80%에 달하였다. 왕우렁이 서식에 따른 수질에 미치는 영향을 평가한 결과 다량의 서식 밀도에서는 약간의 영향을 줄 수는 있겠으나, 잡초방제를 위하여 투입되는 밀도에서는 전혀 영향이 없었다. 논 잡초방제를 위하여 벼 이앙초기에 투입되는 왕우렁이가 2~3일이내에 일시에 집단 패사되는 직접적인 원인은 미소생물인 패충류(참씨벌레)에 의하여 발생되지 않는 것으로 판명되었다. 다만 패충류 (참씨벌레)에 의하여 패사되는 비율은 밀도에 따라 2.86%와 5.71%로 매우 미미하였고, 통계적인 유의적인 차이가 없었다. 논 잡초방제를 위하여 투입된 왕우렁이들은 벼 이앙시기가 빨라지고, 일교차가 커지면서 추운 저온의 날씨로 인하여 논의 흙속으로 들어가서 죽거나 일부는 새의 먹이가 되어 사라지기 때문에 다량이 죽은 것으로 오해되었다.

This study analyses the use of agri-environment concept in South Korean laws and tries to identify the limitations and improvements. The agri-environment has been used in the EU agricultural policy since the mid 1980s, and now became the most important policy in the rural development policy. It has been regarded as a concept explaining the various factors for agricultural production. However, the EU defines it as results of agricultural production which includes not only environmental and natural features but also social and historical resources in rural areas. This definition has played a key role in the 2013 reform of the CAP. Because many developed countries are implementing the agri-environmental policy, South Korea needs to introduce it soon. In doing so, this research explores how the current South Korean laws are dealing with the relationship between agriculture and environment. It reviews 34 laws in total and finds out neither act applying the concept of agri-environment, nor recognizing the role of agricultural production in biological and environmental conservation. Nevertheless, this research identifies that some acts could be a basis for introducing agri-environmental policy in South Korea if they may complement the interrelationship between the agricultural production and conservation of rural resources.

This study is a basic research for the development of ‘Marginal Village Policy’ in response to the hollowing-out of rural areas. For this purpose, the viewpoint of “Regeneration” & “Reconstruction” of the “Marginal Village Theory” and the recent “Rural Planning Theory of Evacuation” in Japan were reviewed. The background and trends of Marginal Village policy in Japan were also investigated. And based on this, the implications and future tasks for Korea were summarized as follows; ①It is necessary to be interested in the disappearance of villages and marginal villages and to form positive discussions and social consensus. ② Continuous field investigation and management of changes in population and village functions at regional and village level are required. ③In addition to increasing the importance of depopulation problems, it is necessary to establish ‘marginal villages’ as a public policy target. ④It is necessary to review and consider the viewpoint of reconstruction along with regeneration. ⑤It is necessary to pay attention that the software project is expanded, and the regeneration & reconstruction policies of the rural villages are aimed at revitalizing the rural community. ⑥It is necessary to consider the possibility of applying ‘spacial construction’ along with the expansion of the academic debate on the ‘rural planning theory of evacuation’. On the basis of this, in this study, rural villages were classified into ‘continuous villages’, ‘semi-marginal villages’ and ‘marginal villages’ according to the degree of marginalization, and the basic framework of ‘Marginal Village Policy’ was proposed, which is to encourage the differentiated policies of ‘continuous villages’ by ‘rural village policy’, ‘semi-marginal villages’ and ‘marginal villages’ by ‘marginal village policy’.

Our society has been dominated by the Dilemma Theory that rational individuals cannot get out of the 'Tragedy of the Commons' without helps from state or market. However, many empirical researches have discovered cases that common pool resources could be managed by cooperative methods of community. Based on the possibility of managing common pool resources by residents' cooperation/solidarity revealed by the recent case researches, this study aims to seek for the theoretical basis to prove it. Generally, public policies are carried forward based on the theoretical basis of the relevant social issues. The objective of this study is to suggest the new direction of policies related to domestic common resources through the researches on community's role in managing local common pool resources represented as "scenic spot". For this, it aims to reveal the influence of community activity on behavioral intention of local common pool resources, by drawing/quantitatively measuring measurement items of local residents' community activity on top of attitude, norms, and behavioral control suggested by the existing Theory of Planned Behavior. The results of this study are as follows; 4 factors such as attitude toward behavior, subjective norm, perceived behavior control, and community activity were all factors that influenced intention to manage.

This study investigated the changes in yields, antioxidant compounds, and antioxidant activities among 11 adzuki bean cultivars cultivated in a paddy field with somewhat poorly drained soil. The adzuki bean cultivars were cultivated in the paddy field from 2015 to 2016 in Milyang, Gyeongsangnam, Korea. Average soil moisture content was 16.5% in 2015 and 31.0% in 2016 at the experimental site during adzuki bean cultivation. As the soil moisture content increased, most of the adzuki bean cultivars showed deceases in stem height, first setting pod node, number of pods, 100 seed weight, and yield. Chungju-pat produced the greatest yields among the 11 cultivars in 2015 and 2016, whereas Hongeon had the smallest yields. Adzuki bean yields after paddy field cultivation was lower for all cultivars than for adzuki bean yields from the same cultivars after upland field cultivation. Chungju-pat and Chilbo-pat showed the smallest decreases in yields after paddy field cultivation, whereas Hongeon and Kumsil showed the greatest yield reductions. There were no significant differences in proximate composition. Some mineral components (P2O5, Ca, and Mg) were statistically different across cultivars. Chungju-pat had the highest Ca and Mg contents, but antioxidant components (polyphenol and flavonoids) and antioxidant activities (ABTS and DPPH) were highest in Saegil and lowest in Jungbu-pat. PCA and clustering analyses, based on the growth, yield, and antioxidant component measurements, performed to identify which variables contributed the most to separating adzuki bean cultivars or to grouping cultivars with similar characteristics. These analyses showed that the antioxidant components and antioxidant activities had the most influence on grouping cultivars together. Among the 11 cultivars, Saegil was statistically different from the other cultivars, but the other 10 cultivars were not significantly different under paddy field cultivation. Soil moisture content affected adzuki bean yield and antioxidant component contents. An increase in soil moisture led to a decrease in yield, but an increase in antioxidant components. These results provide information that will improve the selection of an appropriate adzuki bean cultivar for use in paddy fields.

본 시험은 전국의 광역친환경 농업단지 중에서 모범적으로 친환경 농업을 실천하고 있 는 3곳(장흥, 순천, 옥천)의 벼 농가를 대상으로 시기별로 양분 분석을 하였다. 장흥지역 농 가만이 경축자원 순환농업을 실천하고 있는 것으로 관찰되었다. 광역친환경 벼 농업단지의 3~9월 사이의 시기별 토양 pH는 5.5~6.7의 분포를 보였고, EC는 0.4~1.0 dS m-1으로 나타났 다. 시기별 토양 전질소는 순천 농가에서 높았고 칼륨은 옥천 농가에서 낮은 수준을 보였 다. 시기별 토양 암모늄태 질소는 봄철 비료 시용으로 6월 전후에 상승하였고, 장흥 농가에 서 가장 높은 수준을 보이다가 이후 크게 감소하였다. 수량과 수확지수가 가장 높았던 옥 천 농가에서 ha당 연간 조수입이 다른 농가보다 세배 가까이 높은 수준을 보였다. 비교적 많은 비료를 투입한 옥천 농가에서 시기별 양분수지가 높았고, 순천 농가의 ha당 칼륨 수지 는 9월에 약 -60 kg까지 관찰되어 칼륨 결핍에 따른 생산성 저하에 일부 영향을 주었을 것 으로 추정되었다. 시기별 전질소와 인산수지는 장흥 농가에서 가장 낮은 수준을 보였고 벼 낟알의 질소이용효율도 가장 높아서 광역친환경 농업단지의 추천할 만한 사례 농가로 평 가되었다.

This experiment was conducted to assess changes to the chemical properties of soil and applicability in a case of rice cultivation with organic fertilizers. The investigator applied organic fertilizers to rice cultivation for five years to examine changes to the chemical properties of soil and found that the experiment group of organic fertilizers made an ongoing increase in pH, organism content, and available phosphate content annually compared with the control group with no big differences according to the amounts of organic fertilizers used. As for the yield components, there were no statistical differences in the number of spikelets and grain filling rate between the experiment group of organic fertilizers and the control group. The experiment group recorded a higher level in 1,000 seeds weight and yield than the control group. Experiment Group 4 recorded the highest level at 29.11 kg of 1,000 seeds weight. Experiment Groups 3 and 4, which used 222 kg and 267 kg per 10 a, respectively, recorded 576 kg and 572 kg of yield, respectively, which were 4.7% and 4.1% higher than 549 kg of control group, respectively. As for the quality of brown rice, there were no statistical differences in the head rice percentage between the control and experiment group, both of which were in the range of 83.2-85.7%. As for the protein content, Experiment Groups 3 and 4, both of which used a lot of organic fertilizers, were in the range of 6.9-7.1%, which was lower than 7.5% of control group. Those findings indicate that the long-term application of organic fertilizers can improve the chemical properties of soil and increase the yield more than the conventional method of fertilizer application. The findings also suggest that it will be effective to apply 222 kg of organic fertilizers or more per 10 a.

Background: Crop rotation plays an important role in improving soil chemical properties, minimizing the presence of disease pathogens, and assists in neutralizing autotoxic effects associated with allelochemicals. Methods and Results: Five rotation crops of sudan grass, soybean, peanut, sweet potato, and perilla were cultivated for one year with an aim to reduce yield losses caused by repeated cropping of ginseng. In 2-year-old ginseng grown in the same soil as a previous ginseng crop, stem length and leaf area were reduced by 30%, and root weight per plant was reduced by 56%. Crop rotation resulted in a significant decrease in electrical conductivity, NO3, and P2O5 content of the soil, whereas organic matter, Ca, Mg, Fe, Cu, and Zn content remained-unchanged. Soil K content was increased following crop rotation with sudan grass and peanut only. Rotation with all alternate crops increased subsequent ginseng aerial plant biomass, whereas root weight per plant significantly increased following crop rotation with perilla only. A significant positive correlation was observed between root rot ration and soil K content, and a significant negative correlation was observed between ginseng root yield and the abundance of actinomycetes. Crop rotation affected the soil microbial community by increasing gram negative microbes, the ratio of aerobic microbes, and total microbial biomass whereas decreases were observed in actinomycetes and the ration of saturated fatty acids. Conclusions: In soil exhibiting crop failure following replanting, crop rotation for one year promoted both soil microbial activity and subsequent ginseng aerial plant biomass, but did not ameliorate the occurrence of root rot disease.