Grant-in-Aid for Scientific Research (A)
Plant nutrition/Soil science
|Research Institution||TOHOKU UNIVERSITY|
SAIGUSA Masahiko TOHOKU UNIV., AGRICULTURE DEP.PROFESSOR, 農学部附属農場, 教授 (10005655)
遠藤 政弘 三菱化成(株), 部長研究員
藤田 利雄 チッソ(株), 肥料研究所, 所長
陽 捷行 国際農林業水産業研究センター, 部長研究員
MAE Tadahiko TOHOKU UNIV.AGRICULTURE DEP.PROFESSOR, 農学部, 教授 (60134029)
金田 吉弘 秋田県農業試験場, 主任研究員
ANDO Ho YAMAGATA UNIV.AGRICULTURE DEP.PROFESSOR, 農学部, 教授 (90005661)
庄子 貞雄 東北大学, 農学部, 教授 (10005605)
みなみ 捷行 国際農林水産業センター, 部長研究員
ITO Toyoaki TOHOKU UNIV.AGRICULTURE DEP.ASSOCIATE PROFESSOR, 農学部附属農場, 助教授 (10176349)
CANADA Yosihiro AKITA AGRICULTURAL STATION CHIEF RESEARCHER
MINAMI Katsuyuki JIRCUS CHIEF RESEARCHER
|Project Fiscal Year
1994 – 1996
Completed(Fiscal Year 1996)
|Budget Amount *help
¥13,000,000 (Direct Cost : ¥13,000,000)
Fiscal Year 1996 : ¥2,800,000 (Direct Cost : ¥2,800,000)
Fiscal Year 1995 : ¥3,200,000 (Direct Cost : ¥3,200,000)
Fiscal Year 1994 : ¥7,000,000 (Direct Cost : ¥7,000,000)
|Keywords||CONTROLLED AVAILABILITY FERTILIZER / RICE / NO-TILLAGE / DIRECT SEEDING / LOW COST CULTIVATION / CORN / ENVIRONMENTAL POLLUTION / NITROGEN-15 / 肥効調節型肥料 / 水稲移植栽培 / 不耕起栽培 / 水稲直播栽培 / 省力・低コスト栽培 / 環境負荷軽減 / デントコーン / 重窒素トレーサ法 / 肥効調節 / 肥料 / 環境負荷 / 施肥法 / 施肥窒素量率 / 低コスト栽培 / 肥効調節型 / 施肥窒素利用率 / 低コスト|
No-tillage (NT) cultivation of both rice and corn were conducted using controlled availability fertilizer (CAF) to reduce both labor costs and environmental degradation while maintaining high yields.
Innovative rice cultivation methods was developed by using sigmoid type of CAF (POCUs-100 ; 100-days release duration-polyolefin coated urea) as a single basal application of total nitrogen in nursery box for the NT transplanting system. Brown rice yields of NT system with POCUs-100 in nursery box were statistically the same or grater than those of conventional tillage (CT) system with readily available fertilizer (RAF). Recoveries of basal POCUs-100-N of rice plants (73-83%) were much higher than those of RAF (20-39%) and thus reduced greatly environmental degradation caused from fertilizer. Further more, no-tilled direct seeding of rice without soil cover were developed using Y-shape furrow and CAF considering the dominant presence of poor drained paddy soils in north eastern Japan. Seedling establishment of rice was improved by using both Y-shape furrow and CAF in combination with POCUs-100 and Long 40 containing nitrate and ammonia.
In dent corn cultivation, Co-situs application of CAF (POCU-30+POCU-70) and corn seeds in no-tillage system was studied in comparison with that of RAF and corn seeds. Emergence rate of corn seedling was more than 90% in CAF plot while that in RAF plot was less than 40% because of burning problem. The dry matter production of corn in NT with CAF was the same or greater than that in CT system applied both basal and top-dressed RAF.
Therefore, it was concluded that NT with CAF in both rice and corn cultivation is innovative feasible method to reduce both labor and environmental degradation while maintaining high yield.