Studies on the Response of Nodulated Soybean to Nitrogen Fertilizer : I. On the carbon dioxide exchange of shoots and undergroud organs

Japanese Journal of Crop Science

Koh-ichiro ASANUMA¹  Noriyuki SUZUKI¹  John ANIM OFOSU¹  Kiyoshi KOGURE¹  Thomas Basuglo BAYORBOR¹ 

关键词: Biomass production;    乾物生産;    CO2 exchange;    収量;    Glycine max;    ダイズ;    Nitrogen fertilizer;    CO2交換;    Seed yield;    窒素肥料;   

DOI  :  10.1626/jcs.61.433

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The effect of nitrogen fertilizer on biomass production, nodulation, seed yield and CO2 exchange was determined in soybean (Glycine max Merr. cv. Akiyoshi) grown in a pot sand culture in a glasshouse. Plants received nutrient solutions containing either no nitrogen (0N), 100 ppm (1N) or 200 ppm (2N). Dry matter accumulation and leaf area increased with increasing levels of supplied nitrogen, while nodule development was significantly suppressed. Yield and the level of nitrogen fertilizer did not significantly affect its components, although 2N gave a slightly higher 100 seed weight and total seed yield per plant. Apparent photosynthesis and respiration of shoot reflected the plant size, but respiration of underground organs was related to the degree of nodule development. The results indicated that excessive application of nitrogen accelerated the growth of vegetative organs, but did not increase seed yield, and that this might be due to high carbon consumption by underground organs compared with the whole synthesized carbon by shoots.

【 授权许可】

Unknown