ダイズの「乾物生産量-蒸発散量関係」に着目した共生窒素固定量推定の可能性

日本作物学会紀事

片山 忠夫¹  村田 和代¹  桑原 廣隆¹  村上 晃平¹  角 明夫¹  朝比奈 愛¹  箱山 晋¹ 

[1] 鹿児島大学

关键词: Dry matter production;    乾物生産;    Symbiotic nitrogen fixation;    共生窒素固定;    Nodulation;    根粒着生;    Non-nodulating mutant;    根粒非着生系統;    Nitrate inhibition;    硝酸阻害;    Evapotranspiration;    蒸発散;    Soybean;    ダイズ;   

DOI  :  10.1626/jcs.72.333

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The quantitative relationship between dry matter production (W) and evapotranspiration (ET) was examined in soybean cv. Tsurunoko cultivated in 8 L containers fertilized with a large amount of inorganic nitrogen (high N), where nodulation was poor, and with a small amount of N (low N), where nodulation was abundant. It was also examined in two isogenic lines; non-nodulating line T201 and nodulating line T202. The value of ET when W was zero (ETW=0), which was determined from the regression lines, was higher in the plants fertilized with a low N than with a high N, and in T202 than in T201. The transpiration coefficient (ΔET/ΔW) was not influenced by N level and was nearly the same in T201 and T202. Difference in W between T201 and T202 (δW) calculated from the difference in ETW=0 (δETW=0) was correlated with the amout of fixed nitrogen estimated in N difference method. These results suggest that the difference in ETW=0 between T201 and T202 represents the energy cost of nitrogen fixation.

【 授权许可】

Unknown