緑肥レンゲ（Astragalus sinicus L.）を17年間連用した水稲収量と その変動要因

日本作物学会紀事

平野 清³  浅井 辰夫²  前田 節子¹  飛奈 宏幸²  西川 浩二² 

[1] 静岡英和学院大学短期大学部;静岡大学農学部附属地域フィールド科学教育研究センター;畜産草地研究所

关键词: Chinese milkvetch;    レンゲ;    17 successive years;    17年間連用;    Early growth;    初期生育;    Factor of yield decrease;    減収要因;    Green manure;    ç·‘è‚¥;    Growth characteristic;    生育特性;    Paddy rice;    水稲;    Yielding ability;    収量性;   

DOI  :  10.1626/jcs.82.353

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 green manure fertilization (Chinese milkvetch) and pesticide application on the grain yield of early maturing rice variety were examined for 17 successive years in the paddy field of Shizuoka University. Green manure without pesticide (only weeds were removed with a weeder and by hand ;GM) were applied from 1993 to 2009, green manure and pesticide (GMP) from 1999 to 2009, chemical fertilizer and pesticide (CFP) from 1993 to 2009. According to weather fluctuation and the damage by rice stem borer from 1993 to 2000, the average rice grain yield in the GM plot during this period was 409 g m-2, while that during the nine years after 2001 was 466 g m-2, which was the same as that in the GMP plot (468 g m-2). On the other hand, the average rice grain yield in the CFP plot was 517 g m-2 from 1993 to 2000 and 539 g m-2 after 2001. The biomass yield of Chinese milkvetch was decreased by the feeding by the exotic insect in the GMP and GM plot in 2006, 2007 and 2009. Thus, the average biomass yield in the GM plot during those three years was 414 g m-2, although that in the other years was 493 g m-2 which was 93% of that in the CFP plot. A close positive correlation was observed between the amount of Chinese milkvetch applied and the rice grain yield. Therefore, the effect of the application of Chinese milkvetch was retarding of early growth of rice.

【 授权许可】

Unknown