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서남부간척지 벼 담수표면직파 재배시 기비시용시기별 생육 및 수량
김영두 ( Young Doo Kim ),최민규 ( Min Kyu Choi ),백만기 ( Man Gee Baek ),구본일 ( Bon Il Ku ),강신구 ( Shin Gu Kang ),박홍규 ( Hong Kyu Park ),최원영 ( Weon Young Choi ),고재권 ( Jae Kwon Ko ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4
Field experiment was carried out to identify the optimum time of basal application of nitrogen in Southwestern reclaimed saline land. Nitrogen application before seeding and 10, 20 & 30 days after seeding were evaluated with three nitrogen application levels(140, 170 & 200 kg/ha) in Munpo soil series having 0.1~0.2% of soil salinity. Nitrogen was split-applied with forestage; basal, tillering stage, flowering initiated stage and ripening stage by a ratio of 50-20-20-10%. Results reveled that seedling stands were considerably higher when basal nitrogen applied before seeding as compared to after seeding. Grain yield increased with increase of nitrogen application before seeding. Grain yield was the highest when nitrogen application was 170~200 kg/ha before seeding. Therefore, it is recommended that the optimum nitrogen application level was 170~200 kg/ha before seeding in direct seeded rice in southwestern reclaimed saline land for maximum plant establishment and grain yield.