본 조사는 일본의 쌀 검사 제도와 품위 등급 규격에 대한 동향을 살펴보고 그에 따른 내용을 파악하여 국내 쌀 산업 발 전 방향에 도움이 될 수 있는 방안을 모색하고자 수행하였다. 1. 농업 경쟁력 강화 프로그램으로 2016년부터는 농산물 규격 검사의 간소화로 최근에는 곡물 검사장에 곡물 판별기를 활용하여 뉘, 맥류, 뉘 이외 곡물 등을 이종 곡립으로 통합하여 5% 이내로 개정하였다. 2. 쌀에 대한 손실 방지를 위해 정미의 포장 표시를 년·월· 일 표시에서 상·중·하순으로 개정하였다. 3. 일본은 매년 생산된 현미 품위 생산량과 등급 비율을 공개 하고 있으며, 1등급 쌀을 대상으로 식미 랭킹을 선정하고 있다.

베트남 메콩 델타 지역은 베트남에서도 쌀 생산이 활발히 이루어지는 지역으로 꼽히고 있으나 기후온난화에 따른 고온 현상 증가로 쌀생산량 감소의 우려가 증대되고 있다. 이에 고온에 따른 벼 피해발생 현황 및 대응 기술에 대한 정보를 제공하고자 한다. 베트남의 평균기온은 2060년 까지 약 2.7oC 증가, 35oC 이상의 폭염은 2030년까지 2달 이상 길어질 것으로 예측되고 있으며 기온상승에 따라 기온이 높은 작기의 벼 생산량이 감소되고 있다. 벼 개화기 온도가 33oC 이상으로 높을 시, 화분의 감수분열에 영향을 미쳐 화분의 활력이 저하되며 수술에서 약의 개열이 감소되어 화분의 방출이 감소될 뿐만 아니라 화분이 암술의 주두에 부착하여 발아 시 발아율을 낮추어 불임 발생이 증가하게 된다. 베트남의 벼 연구소는 고온에 대비하여 베트남 벼 생산의 안정화를 위해서 개화기에 내열성을 가지는 품종 육성 뿐만 아니라 이른 아침에 개화할 수 있는 품종을 육성하고 있다. 또한 재배 적인 측면에서 고온 피해를 줄일 수 있도록 벼 재배시기를 조절하여 기존 3기작에서 고온피해가 큰 시기의 재배를 제외한 2기작으로 재배하는 반면 파종 및 이앙시기를 조절하여 벼의 생육량을 충분히 확보하여 2기작에 따른 수량감소를 최소화하는 연구가 필요하다. 더불어 벼를 재배하지 못하는 무더운 계절에는 농업인의 소득보존을 위해 논을 이용한 물고기 양식 기술 도입하는 것도 필요하며, 시비 방법 등의 개선을 통한 벼 생육량 조절, 물관리 기술 개발을 통한 포장 미세기상변화 등의 연구가 필요할 것으로 판단된다.

본 연구에서는 평균온도 상승에 따른 출수기변화, 수량구성 요소 및 수량, 출수기건물중 및 식물체 질소함량 변화를 평가 한 결과는 다음과 같았다. 1. 생육기 평균온도 1oC 상승 시 밀의 출수기는 약 2.8일 단축된 것으로 판단되었다. 2. 평균온도 상승 시 수량구성요소와 수량이 악화되었는데, 주로 면적당수수 감소에 의해 면적당립수와 수량이 감소한 것으로 판단되었다. 3. 1수립수는 11월 7일 파종 시 고온조건에서 감소하였으나 11월 17일 파종 시 고온조건에서 감소하지 않았다. 4. 천립중은 출수 후 30일간 평균온도 1oC 당 약 2.1g씩 감소하였다. 5. 평균온도 상승 시 출수기 건물중은 감소하지 않았으나, 출수기 면적당경수는 감소한 것으로 판단되었다. 6. 고온처리 시 식물체 질소흡수량이 감소하여 면적당립수가 감소한 것으로 판단되었다.

This study was conducted to clarify the effect of high temperature during winter period(autumn sowing) and spring sowing on yield, quality and growth and development in barley. The varieties used for the experiments were heenchalssalbori and keunalbori 1 having a strong spring habit characteristics. In spring sowing treatment, spikelet differentiation was proceeded rapidly and tillering was proceeded slowly compared to the development stage, because the barley sowed at spring is cultivated in high temperature and long day conditions from sowing to spikelet differentiation stage compared with autumn sowing(control). And in high temperature treatment during winter period, like spring sowing, tillering was inhibited compared to the development stage. The number of grain per panicle and the period required to heading stage from spikelet differentiation were reduced largely at spring sowing, because spring sowing treatment was conducted in high temperature and long day condition compared with autumn sowing and high temperature treatment during the period from spikelet differentiation to heading stage. Meanwhile in spring sowing treatment, average temperature during ripening stage was higher than the autumn sowing and high temperature during winter, because heading stage was so late. After all, starch, amylose content and grain weight were reduced while protein content was relatively increased in spring sowing treatment due to difference of average temperature of ripening stage. These changes affected the decrease of viscosity of peak, trough, breakdown and the increase of setback viscosity

We investigated the changes in the physicochemical properties of wheat grains during ripening stage to determine the effect of the rise in average temperature on that of wheat grains. The treated average temperatures were 18.3°C(control), 19.9°C(1.6°C increase), 21.5°C(3.2°C increase) in artificial climate room from heading time to harvest. Results showed that the ripening period from heading to maturity tended to be shorter during higher temperature treatment condition. The 1,000-grain weight, grain width, number of florets per spike, and number of grains per spike decreased as the ripening period was shortened. Gelatinization properties were affected by high temperature due to the reduction of starch and amylose contents. As the grain filling period was shortened by high temperature treatments, the crude protein content increased. As the grain filling period was shortened by 6 days, the starch and amylose contents decreased by 10.8% and 5.4%, respectively. However, the crude protein content increased by 1.7% in such a condition. Starch content showed positive correlations between amylose and breakdown. Meanwhile, it showed negative correlations between electric conductivity of leaching water from seeds, crude protein content, peak viscosity, trough viscosity, final viscosity, and setback.

‘Palbangmi’ is a super high-yield rice cultivar bred by interspecies cross between Tongil type and Africa rice. But, ‘Palbangmi’ has a problem in grain maturation which results in rice yield decreases. Because ‘Palbangmi’ is Tongil and Africa rice interspecies-crossed cultivar, it would be predicted to require higher temperature for grain maturation than japonica rice. Therefore, ‘Palbangmi’ would be required to determine Late Marginal Heading Date (LMHD) for normal maturation. In this study, experiment of transplanting date was carried out to determine LMHD of ‘Palbangmi’ in Suwon and Iksan for 3 years. When daily mean temperature was below 23oC, grain filling ratio (%) increased about 8% for each 1oC. On the other hands, grain filling ratio (%) didn't increase when the daily mean temperature was above 23oC. Therefore, it is determined that 23oC is adequate for minimum threshold temperature for grain maturation. The LMHD of ‘Palbangmi’ was determined from calculated heading dates for each year which could satisfy threshold temperature for 40 days after heading during last 15 years. As a results, LMHD was earlier than August 1 in 16 regions where it is inadequate for ‘Palbangmi’. Continually, LMHD was August 1 ~ August 5 in 13 regions, August 6 ~ August 10 in 14 regions and August 11 ~ August 15 in 21 regions. Finally, LMHD was later than August 15 in 14 regions. Considering that heading date of ‘Palbangmi’ is August 13 as mid maturing ecotype, it is suggested that earlier transplanting required for normal maturing in almost areas except south plain area and some areas of central plain area.

The object of this study conducted to investigate the effect of paddy-upland rotation cropping system on soil properties and crop productivity in newly reclaimed tidal land. Five types of paddyupland rotation cropping system were evaluated : Rice-Rice (RR) Rice-Maize (RM), Mize-Maize (MM), Rice-Soybean (RS), Soybean-Soybean (SS). The soil bulk density was the lowest RM treatment, and soil pH was a tendency to be lower in all treatments of the paddy-upland rotation cropping system. RM treatment showed a higher moisture content and lower Electrical conductivity than RR treatment. Results of maize productivity in paddy-upland rotation cropping system, Except for the stem diameter growth, RM treatment showed good growth and productivity than MM treatment. Soybean growth and yield increased in the rotated upland cultivation from rice-paddy field compared to the SS treatment. But, overall treatments indicated poor growth and yield. In this study, we offer the effects of paddyupland rotation cropping system on the soil properties and upland crop growth and yield, and also out results can be provide supporting basic data that introduced paddy-upland rotation in reclaimed tidal land.

This experiment was conducted to clarify the effect of the high temperature on physicochemical properties of barley kernels during ripening stage. High temperature treatment was lasted from each 10, 17 and 24 days after heading(DAH) until the harvest time at 21oC, 24oC, 27oC in artificial climate room. The results showed that ripening period from heading to maturity was tend to be shorter at higher temperature treatment condition and at longer duration treatment condition. and 1000-grain weight was decreased as the ripening period shortened. Furthermore, gelatinization properties was changed by high temperature due to the reduction of starch and amylose contents. As the shortening of grain filling period by a high temperature treatment, the protein content was increased. In the 10 DAH at 27oC treatment, the grain filling period was shortened by 9 days. The starch contents was reduced by 5.7 %, and the protein content was increased by 5.6 % in a such condition. Protein contents was showed negative correlations with amylose, starch contents and gelatinization properties, respectively. Starch contents, however, showed positive correlations with amlyose content and gelatinization properties.

Salsola komarovi Iljin is a halophyte and herbaceous annual native to the sand dunes and beaches of Japan, northern China, Sakhalin, and Korea. The plants have been known as an ecologically important species for enhancing formation of sand dunes in Korea. The purpose of this study was to examine the anti-gastric ulcer effect of Salsola komarovi Iljin halophyte in an HCl-ethanol-induced gastritis model. SD rats (7-weeks-old) were divided into normal (I, n=10), control (II, 60% HCl-ethanol + water, n=10), 60% HCl-ethanol + Ranitidine 300 mg/kg (III, n=10), 60% HCl-ethanol + Salicornia herbacea L. 500 mg/kg (IV, n=10), 60% HCl-ethanol + 50% alcohol extract of Salsola komarovi Iljin 500 mg/kg (V, n=10), and 60% HCl-ethanol + water extract of Salsola komarovi Iljin 500 mg/kg (VI, n=10) groups. Salsola komarovi Iljin significantly suppressed gastric lesions and ulcers in the 60% HCl-ethanol-induced gastric model. Especially, 500 mg/kg of 50% alcohol extract of Salsola komarovi Iljin showed significant inhibitory effects against gastritis. Especially, 50% alcohol extract of Salsola komarovi Iljin 500 mg/kg showed a significantly inhibitory effect, which was more potent than that of 300 mg/kg of Ranitidine. In histopathological analysis of the animal model, Salsola komarovi Iljin attenuated gastric ulcer formation. Our results suggest that Salsola komarovi Iljin has inhibitory effects against gastritis and gastric ulcers and could be developed as a new anti-gastric ulcer agent.

새만금 인근의 간척지 유리온실에서 파프리카의 암면재배시LED 보광처리효과를 실험하기 위하여 본 연구를 시행하였다.식물체는 자연광, LED로 처리하여 일출 후 점등하여 일몰 약1시간전에 소등하였다. 실험의 결과는 다음과 같다. 1. 파프리카 초장은 ‘더비’품종에서는 자연광처리구에서 1월측정 초장이 29cm 더 신장되었다. 2. 1-2월 파프리카의 1주당 수량은 LED 보광처리구 및 자연광처리구에서 ‘쿠프라’품종에서는 764g 및 392g로, LED보광처리구에서 95% 증수되었으며, ‘콜레티’품종에서는 624g 및292g로, LED보광처리구에서 114% 증수되었다. 3. 재배기간 전체의 파프리카 상품수량은 ‘쿠프라’품종에서LED보광처리구에서 7,342g/㎡로 자연광처리구의 4,878g/m2에 비하여 51% 증수되었다.

본 연구는 신간척지에서 벼 기계이앙재배시 염 피해가 적으면서 안정적인 쌀 수량 확보를 위하여 질소시비량을 11, 14,17, 20kg/10a 및 진단시비로 하여 새로 조성된 간척지인 새만금 계화포장에 기계이앙하여 수행한 내용을 요약하면 다음과 같다.1. 2년 평균 토양염농도는 이앙전 0.06%에서 환수후 이앙직후에는 0.03%로 낮아졌다.2. 질소시비량별 출수기는 N11 및 14kg/10a에서는 8월 16일인데 비해 N17, 20 및 진단시비에서는 1일 늦은 8월 17일이었다.3. 도복관련형질에서 질소시비량이 많을수록 도복지수가 높아 포장도복은 N11에서는 도복이 발생되지 않았고, N14에서는 1, N17과 진단시비는 3 정도로 약하게 발생되었으나 N20에서는 7로 반도복 이상 발생되었다.4. 질소시비량별 수량구성요소를 보면 주당수수는 N17>진단시비>20>14>11 순으로 많았고 등숙비율과 현미천립중은비슷하여, 쌀수량은 진단시비=N17>14>20>11 순으로 많았다.5. 질소시비량별 쌀 품질에서 완전립비율은 N14>진단시비=11>17>20 순으로 높았고, 아밀로스함량은 질소시비량간에별 차이가 없었으나 단백질함량은 질소시비량이 많을수록 높아졌다.이상의 결과로 볼 때 새로 조성된 간척지에서 벼를 기계이앙재배 할 경우 안정적인 쌀 수량 확보를 위한 적정 질소시비량은 16~18kg/10a이 적당하다고 판단된다.

본 연구는 염생식물인 퉁퉁마디를 대상으로 하여 신간척지에서 안정적인 재배법을 구명하고자 수행하였다. 먼저 퉁퉁마디의 발아특성을 알아보기 위해 염농도(NaCl 0 ~ 3% 농도) 별발아율 시험을 수행하였다. 10oC에서는 모든 염농도에서 발아속도는 느리나 15일까지 발아가 지속되어, 78 ~ 90%의 발아율을 나타내었다. 20oC이상에서는 4일 안에 최대의 발아율을 나타내었으며, NaCl 3%에서 온도가 올라갈수록 발아율이 저하되는 경향을 보였다. 퉁퉁마디의 질소시비량 별 생육특성을 알아보기 위해 온실포트실험을 실시한 결과, 퉁퉁마디 파종 후 5일 후부터 발아가 시작하였고, 퉁퉁마디의 생육은 질소시비량이 증가할수록초장 및 분지 등이 증가하는 경향을 나타내었다. 또한 염농도에 따른 생육특성을 조사하기 위해 양액 재배 조건에서 염농도에 따른 퉁퉁마디 생육을 실험하였다. 양액조건 상태에서NaCl을 처리하지 않으면 생육이 저조하여 1개월 이후에 고사하기 시작했으며, NaCl을 처리한 구에서는 NaCl 200 mM에서생육이 좋았고, NaCl 500 mM 이상의 염농도에서도 재배가 가능할 것이라 생각된다. 신간척지에서 퉁퉁마디의 어린 싹을6월에 이식하여 질소시비량이 퉁퉁마디 생육에 미치는 영향을조사하였다. 퉁퉁마디의 초장 및 분지수 등이 질소시비량이 증가할수록 유의적으로 증가하였으나, 인산을 비롯한 무기성분함량은 유의적인 차이가 없었다.

무인헬기를 이용한 벼 직파재배기술을 확립하고자2009 ~ 2010년에 국립식량과학원 벼맥류부 계화 시험포장에서 무인헬기의 벼 직파성능, 최적 비행방법, 볍씨의 적정 최아길이 및 쌀 수량 등을 검토한 결과를 요약하면 다음과 같다. 1. 무인헬기의 볍씨 1회 탑재량은 18 kg이며, 파종면적은 0.4 ha이었으며, 무인헬기의 비행속도는 20 km/hr, 비행높이는 3m가 적당하였다. 2. 무인헬기의 ha당 파종시간은 10분이 소요되었으며, 이는 기존의 직파재배보다 파종노력이 6 ~ 15배정도 절감되었다. 파종비용은 무인헬기 직파가 담수표면산파보다 14%정도 절감되었다. 3. 무인헬기로 파종할 볍씨의 최아길이는 3 mm보다 1 mm가 적당하였다. 4. 무인헬기 직파시 담수로터리직후 파종보다 담수로터리 후 1일에 파종한 것이 볍씨가 얕게 매몰되어 입모가 양호하였다. 5. 무인헬기를 이용한 직파재배가 이앙재배보다 쌀 수량이 3%, 완전미 수량이 5%정도 감소되었으며, 완전미 비율도 다소 낮은 경향이었다. 6. 이상의 결과로 보아 대규모 들녘에서 무인헬기를 이용하여 벼 직파재배를 할 경우 획기적인 노력절감 효과가 기대된다.

돈분뇨 액비 시용 후 경운처리에 의한 청보리, 호밀, 트리티케일, IRG의 생육과 잡초발생량 차이를 구명하였다. 파종기에 한발이 지속된 포장의 수분함량을 조사한 결과 화학비료 처리구와 무처리구에서는 8.5 ~ 9.1%를 나타냈으나, 액비를 살포한 포장은 20.5 ~ 23.1% 수준이었다. 파종 15일 후에 유묘출현율은 액비 처리구에서는 화학비료 및 무처리구에 비하여 청보리는 2.9배, 호밀과 트리티케일은 각각 2.2배, 2.4배 높게 나타났다. 또한 시험작물 모두 초장이 액비시용구에서 약 2배 이상 증가하였다. 월동 후 최고분얼기에는 모든 작물의 초장이 화학비료 및 무처리구에 비하여 액비처리구가 1.1 ~ 1.3배 길었고 경수도 비슷한 경향을 보였으며, 분얼수는 청보리, 호밀 및 트리티케일이 각각 4.5개, 5개 및 6개/개체로 화학처리구에 비해서 1개체씩의 증가를 보여 한발에 의한 초기 생육차이가 월동 후에도 지속되는 것으로 확인되었다. 한편 잡초발생은 답리작포장이기 때문에 뚝새풀이 주로 발견되었으며, 액비 처리구는 경운으로 m2당 잡초발생수가 5개 수준이었으나, 화학비료 처리구는 무경운으로 145개 발생되어 29배의 잡초발생 차이를 보였다. 월동 후 액비시용하고 경운을 하면 비료효과가 지속되어 화학비료 처리구보다 우수한 생육을 보였으나, 액비시용 후 무경운 처리는 낮은 생육을 보였다. 수확기 생체중 역시 액비처리후 경운처리구가 가장 높았으며, 청보리, 호밀, 트리티케일, IRG 모두 증수되었다. 따라서 한발이 지속될 경우 액비살포 후 경운은 작물의 영양원으로 뿐만 아니라, 수분공급의 효과로 종자의 발아를 촉진시켜 초기생장 및 수량증수에 크게 기여하며 부수적으로 잡초발생도 감소시키는 것으로 판단된다.

Limonium tetragonum is a halophyte grown naturally in the coastal region in South Korea. This study was conducted to investigate the effects of salt concentrations on seed germination, seedling growth, and antioxidant capacity of L. tetragonum. Seeds were collected from naturally grown plants of L. tetragonum and those at full maturity were used in this experiment. All experiments were performed at 0%, 0.5%, 1.0%, or 2.0% of salt concentrations. Seed germination rate was highest as 86% at 20℃ and followed as higher in order of 25℃, 30℃ and 15℃. The germination rate was about 80% at 0% or 0.5% of salt concentration, but it was very low at the salt concentrations higher than 1%. Growth of L. tetragonum seedlings showed no difference in Hoagland solution containing NaCl in the range of 0% to 1.0% and seedlings survived at 2.0% of NaCl concentration. As the salt concentration increased, the content of Na+ in the shoot increased, but that of K+, Ca++, or Mg++ decreased. The antioxidant activity and the content of total polyphenol and total flavonoid in the shoot were similar at 0% and 0.5% of NaCl and were highest at 2.0% of NaCl concentration. In conclusion, performance of seed germination and plant growth of L. tetragonum was highest at 0% and 0.5% of NaCl concentration, and showed no difference in antioxidant activity, total polyphenol contents, and total flavonoid contents at the same salt concentrations.

This experiment was conducted to evaluate the effects of high temperature on the stem, leaf and grain of barley during the ripening period and to provide information for the development of high-temperature cultivation techniques and adaptive varieties. We used an artificial climate control facility, to provide a temperature 3℃ higher than the normal average temperature during the ripening stage. Although the maximum rate of starch synthesis was increased at high temperature by approximately 11%, the starch content was decreased, because the period of starch synthesis ended 4 days earlier. As in the case of starch synthesis, the expression of genes related to starch synthesis was increased at the early ripening stage in the high temperature treatment, however, the duration of expression tended to decrease rapidly. Furthermore, the partitioning rate of assimilation products in the panicle increased to a greater extent in the high temperature treatment than in the control. In contrast, for the stem and leaf, the partitioning rate of assimilation products decreased more rapidly in the high temperature treatment than in the control. On the basis of these results, it can be considered that the translocation rate of assimilation products increased to a greater extent in the high temperature treatment than in the control at the early ripening stage. These results indicate that the decrease in grain weight at high temperature during the ripening stage is attributable to an increase in the speed of starch synthesis at high temperature, but the increase in ripening speed does not compensate for the shortening of the ripening period. Finally to develop varieties and cultivation techniques suited to high temperature, we need to focus on physiological characteristics related to the duration of starch synthesis.

The increase in the frequency of occurrence of abnormal weather could include severe rainfall, which could cause rice submergence during the ripening stage. This experiment was conducted to clarify the effects of submergence during the ripening period on yield and quality of rice. The flooding treatment was conducted at 7 and 14 days after heading. Flooding conditions were created with two conditions, flag leaf exposed and overhead flooding, and each condition was divided into two conditions according to water quality—clear and muddy. Although the yield decrease was more severe at 7 days after heading because of the decrease in the ripening ratio, the head rice ratio was more affected at 14 days after heading because of the increase in the chalky kernel ratio. The maximum quantum yield (Fv/Fm), which indicates the photosynthetic efficiency, did not differ before and after the flooding treatment until flooding continued for 4 days. In addition, stem elongation occurred because of flooding as an avoidance mechanism in japonica rice. This phenomenon was expected to decrease the supply of assimilation products to the spikelet (sink). Overall, it was suggested that additional experiments should be conducted examining the change in the starch synthesis mechanism and transfer of assimilate products resulting from submergence, for development of cultivation techniques corresponding to submergence and breeding of varieties with submergence tolerance characteristics.

This research was carried out to investigate the germination and seedling growth characteristics of the halophyte Suaeda asparagoides under various salt concentrations, temperatures, and the presence or absence of light S. asparagoides has a non-endospermic dicotyledonous seed structure that is go stone-shaped with a dark brown color and covered by a star-shaped perianth. Germination within the temperature range 5~40°C varied from 8% to 65%. The highest germination occurred at 15°C. In seeds exposed to salt concentrations in the range 0~400 mM, the highest germination occurred at 0 mM, and the germination progressively decreased as the salt concentration increased. When the perianth of the seed was removed, the germination increased significantly. In the presence or absence of light, germination under white light was 5~20% higher than that under darkness, which varied according to salt concentrations in the range 0~300 mM. The plant growth of S. asparagoides, evaluated by plant height, branch number, root length, fresh weight, and dry weight, was higher in the concentration range 50~100 mM, and it decreased in the other concentrations. In conclusion, the seeds of S. asparagoides showed higher germination in fresh water at low temperature of approximately 15°C under light when the perianth was removed, and the plant growth was higher at salt concentrations of 50~100 mM.

This experiment was conducted to identify the variations in inorganic nutrients and plant growth in millet (Panicum miliaceum L.) due to soil salinity. The soil series was Munpo and soil texture was silt loam. The experimental soil was amended so that the soil had salinities of 0.8 dS m-1, 1.6 dS m-1, 3.2 dS m-1 and 4.8 dS m-1. Millet was transplanted 15 days after sowing. As soil salinity increased, the degree of reduced growth was in the order of seed production > root dry matter > plant dry matter > culm length > tiller number > stem thickness > Panicle length. Seed production was decreased to 18.9% in soil salinity of 1.6 dS m-1, 36.9% in of 3.2 dS m-1, and 50.7% in EC of 4.8 dS m-1. Root dry matter decreased to 35.8% in EC of 3.2 dS m-1, and to 40.5% in EC of 4.8 dS m-1. As soil salinity increased, Total nitrogen content increased in all aboveground parts, roots and seeds. However, There was no difference in CaO, P2O5, K2O and, MgO in soils of different salinity. On the other hand, Na2O content was higher in the order roots> shoots> seed, and in the case of roots, Na2O content increased to 1.02% in soil salinity of 4.8 dS m-1. However, up to soil salinity of 1.6 dS m-1, the Na2O content of the seed was similar to that in plant grown in the Control conditions(0.8 dS m-1). In conclusion, taking into consideration economic factors, millet could be cultivated in soil with salinities of up to approximately 1.6 dS m-1, and seed produced from reclaimedland would be suitable for human consumption.

This study was conducted to measure the effect of PE film mulching and irrigation methods on the growth, yield and antioxidant activity of potatoes tubers, in order to examine the possibility of cultivating potatoes in winter season in vinyl greenhouse on the reclaimed tidal land with weak ground inside the sea wall currently completed. The test was conducted on the sandy loam soil (Munpo series), and its salt concentration was 0.42% at the time of planting. The emergence speed per kind of PE film mulching was in the order of black > coloration > transparent > green color, with the black color showing the fastest speed. The temperature change during a day per kind of PE film mulching was in the order of transparent > coloration > green > black color. As for the salt concentration in the soil for each different way of water management, the salt concentration in the treatment of drip irrigation with 1 week interval was lower than that drip irrigation with 2 weeks interval. As for the growth of above-aerial part, plant length was higher, number of tiller and leaves were more and dry weight of above-aerial part was larger in the treatment of drip irrigaton with 1 week interval than drip irrigation with 2 weeks interval. As for the yield of potatoes depending on were higher with pear color vinyl treatment. each way of water management, the yield in the treatment of drip irrigation with 1 week interval was more than drip irrigation with 2 weeks interval. The yield for each different kind of PE film mulching in the weekly drip-irrigation management section was in the order of transparent ≥ black ≥ coloration ≥ green color. In both of total phenol content and DPPH free radical activity experiments, the content and activity