논문 상세보기
pp.68-76
본시험은 하해습성 충적통인 전북통에서 벼 무논골뿌림재배시 측조시비에 알맞은 시비량 및 시비방법을 밝히고자 1995년에 동진벼를 10a당 5kg씩 5월 15일에 6조식 모논골뿌림 파종기로 파종하는 동시에 표준시비량의 100%와 80%량의 완효성 복비를 파종기부착 측조시비기로 파종골의 측면 4cm에 3cm깊이와 5cm길이로 전량을 기비로 시용하여 시험한 결과를 요약하면 다음과 같다. 1. 측조시비에서는 어느 파종방법이나 관행보다 초장이 길고 경수가 많았으나 유효경비율은 적었고, 측조시비방법간에는 100%가 80%시비보다 수수는 많았으나 유효경비율이 적었고, 3cm가 5cm깊이 시비보다 수수가 많고 유효경비율도 높았다. 2. 엽면적지수와 건물중은 생육초기에는 측조시비보다 관행시비서 높았으나 최고분얼기 이후는 측조시비가 높았고 측조시비방법간에는 생육초기는 3cm깊이 시비가 5cm깊이 시비보다 높았으나 최고분얼기 이후는 5cm시비에서 높았다. 3. 토양중 NH4 -N는 파종후 25일에는 관행이 측조시비보다 많았으나 파종후 40일부터는 측조시비가 많았으며, 측조시비간에는 파종후 40일까지는 3cm시비가 5cm시비보다 많았으나 그후에는 5cm시비가 3cm시비보다 많았다. 4. 복상형질은 관행시비보다 측조시비가 나빴고, 측조시비간에는 80%시비보다 100%시비에서, 3cm시비보다 5cm시비에서 불량하여 측조시비 100%에서는 출수후 30일에 3정도의 복상이 발생하였다. 5. 출수 및 m2 당 입수는 관행시비방법이 측조시비 80%보다도 적었으나 측조시비의 시비량 및 시비방법간에는 별 차이가 없었다. 6. 쌀수량은 관행이 측조시비 80%보다도 적었으며, 기타 측조시비방법에서 관행시비와 별 차이가 없었다. 이상 생육 및 수량으로 보아 모논골뿌림재배에 알맞은 측조시비의 시비량 및 시비방법은 관행시비량의 80%를 완효성비료로 파종과 동시에 파종골옆 4cm에 3cm 깊이로 시용하는 것이라고 생각된다.
To elucidate the optimum fertilizer level and application method for band application under puddled-soil drill seeding in Jeonbuk series of fluvio-marine alluvial soil at National Honam Agricultural Experiment Station in 1995, using Dongjinbyeo, slow releasing compound fertilizer of 100％ and 80％ to conventional application level was applied totally as basal fertilizer simultaneously with seeding under 3cm and 5cm depth from soil surface in a distance of 4cm from the seeded row. Plant height was taller and tiller number was higher in band application than conventional application but ratio of effective tiller was vice versa. Panicle number was more but ratio of effective tiller ratio was lower in 100％ than 80％ level of band application and they were higher in 3cm than 5cm depth from soil surface. Leaf area index and dry weight was higher in conventional application at early growth stage but was vice versa after maximum tillering stage, and they were higher in 3cm depth at early growth stage but 5cm depth after maximum tillering stage. NH4 -N in soil was higher in conventional application at 25 days after seeding but, thereafter was lower than band application and it was higher in 3cm than 5cm depth till 40 days after seeding but was versa, thereafter. Lodging degree was slightly higher in band application, 100％ level and 5cm depth than in their counterparts. Panicle number and grain number per m2 was lower in conventional application than 80％ or 100％ level of band application without significant difference between band application levels or application methods. Yield was higher at 80％ level of band application under 3cm depth than conventional application, but no significantly different among other application methods. Therefore, 80％ level of band application under 3cm depth of soil surface was more effective for puddled-soil drill seeding on the basis of the reduction of application efforts, better plant growth and higher yield in rice.
