シロクローバを利用したスィートコーンのリビングマルチ栽培体系における窒素フローの推定

日本作物学会紀事

三浦 重典¹  小柳 敦史¹  小林 浩幸¹  渡邊 好昭¹ 

[1] 農業・生物系特定産業技術研究機構

关键词: Leaching of nitrates;    窒素溶脱;    Living mulch;    リビングマルチ;    Nitrogen fixation;    窒素固定;    Nitrogen flow;    窒素フロー;    Sweet corn;    スィートコーン;    White clover;    シロクローバ;   

DOI  :  10.1626/jcs.73.436

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To estimate the nitrogen competition between crops and living mulch plants, we compared the nitrogen flow in the sweet corn (Zea mays L.) - white clover (Trifolium repens L.) living mulch system (LM) with that in the conventional cultivation (CV). The field experiments were conducted in 2000 - 2002. Yield and total nitrogen content of sweet corn in LM were the same as that in CV. During the sweet corn growing period, the amount of nitrogen supplied from white clover residue to soil was estimated to be 11.72 gm-2. On the other hand, nitrogen taken up by white clover was 7.11 gm-2, and 1.55 gm-2 of which was from soil and fertilizer. The amount of nitrate leached out in LM was about 2.0 gm-2, which was lower than that in CV. The experiment using 15N showed that 27.3 % (2.48 gm-2) of nitrogen taken up by sweet corn was from the white clover residue and 6.62 gm-2 was from soil and fertilizer. The estimation of nitrogen flow showed that the nitrogen removal from soil in LM was about 2 gm-2 less than that in CV. These results suggest that nitrogen competition between sweet corn and white clover would be small. We consider that the rate of nitrogen fertilizer application could be reduced by using this living mulch system.

【 授权许可】

Unknown