水田転換畑におけるダイズ不耕起狭畦無培土栽培の継続による収量， 品質の経年変化

日本作物学会紀事

坂東 悟¹  藤山 英保² 

[1] 鳥取県農林総合研究所農業試験場;鳥取大学農学部

关键词: Continuous cultivation;    連作;    No-tillage;    不耕起;    Seed quality;    子実品質;    Soybean;    ダイズ;    Yield;    収量;   

DOI  :  10.1626/jcs.80.426

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

No-tillage cultivation without molding (NTC) of soybean, which decreases the instability of yield and improves the profitability compared with conventional cultivation (CVC) has spread among large-scale farmers. In Japan, however, due to few experiments on NTC, its advantage is not well recognized. To evaluate successive NTC in the field converted from paddy, we investigated the changes in the growth, yield and quality of soybean (Tamahomare) for 7 years (2003—2009) under NTC and CVC. There was no serious damage by diseases or pests during the period. Total C and available N in soil (0—30 cm) greatly decreased. There was no difference in yield between NTC and CVC, the average yield being 320 g m-2. The change in yield during the successive cultivation tended to be larger in CVC than in NTC. In both NTC and CVC, seed protein content varied with the year, but there was no difference in the protein content between NTC and CVC. A high correlation was observed between Ca content of seed and ex-CaO in 0—30 cm soil (r=0.86**) in both NTC and CVC. Ca content of seed increased during the successive cultivation, and at the fifth harvest was about 2.5 times that in the first year. In addition, the average Ca content of seed was higher in NTC than in CVC, which might be due to the difference in soil management. In NTC, 100-seeds weight, large-seed rate, stem thickness and number of pods per plant were lower, but the number of pods m-2 was higher than in CVC , which might be due to the difference in planting density.

【 授权许可】

Unknown