77年間継続した四要素無施用区と堆肥施用区にみられる水稲玄米収量の経年推移と各要素の施用効果

日本作物学会紀事

井澤 敏彦²  籾井 隆志¹ 

[1] 愛知県農業総合試験場 安城農業技術センター;愛知県農業総合試験場 作物研究部

关键词: Adding compost;    堆肥施用;    Component deficiency;    要素欠除;    Consecutive study;    連用試験;    Five elements;    五要素;    Multi-regression-analysis;    重回帰分析;   

DOI  :  10.1626/jcs.76.288

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effects of four fertilizer elements (nitrogen, phosphoric acid, potassium and lime) and compost on rice plant during the 77 years from 1926 were studied. Lack of adding nitrogen, phosphoric acid, potassium and lime significantly decreased the yield, conversely adding compost increased the yield. The ratio of the yield in the plot lacking nitrogen or phosphoric acid to that with four elements fertilized was considered to decrease gradually. On the contrary, the ratio of the yield in the plot with compost to that with four elements fertilized gradually increased. Therefore, it is considered that compost effect is increased gradually. However, it was uncertain why the ratio of the yield in the plot lacking potassium and lime to that with the four elements gradually increased. We found definite fertility of the soil without application of fertilizer and the effect of four elements on the yield.

【 授权许可】

Unknown