地下部分隔对蚕豆/玉米间作氮素吸收和土壤硝态氮残留影响

利用田间试验,探讨了地下部分隔对蚕豆/玉米间作氮素吸收和土壤硝态氮残留的影响,结果表明:蚕豆/玉米间作,蚕豆不分隔条件下籽粒和秸秆吸氮量比分隔分别增加20 10%,34 43%;玉米不分隔条件下籽粒吸氮量与分隔近似,但秸秆吸氮量比分隔减少13 04%;蚕豆和玉米不分隔条件下土壤硝态氮累积量都高于分隔。蚕豆/空带间作,蚕豆不分隔籽粒吸氮量高于分隔,但土壤硝态氮累积量没有差异。空带/玉米间作,地下部分隔与否,作物吸氮量和土壤硝态氮累积量都没有差异。

Effect of Root Separation on Plant Nitrogen Uptake and Soil Nitrate Nitrogen Residual in Faba Bean/Maize Intercropping

The effect of root separation on plant nitrogen uptake and nitrate nitrogen residual were investigated through field experiment. The results showed that the nitrogen uptake of faba bean with no root separation were higher than that with root partition, and nitrogen acquisition of grain and straw were increased by 20.10% and 34.43%, yet maize nitrogen uptake with no root separation were little lower than that of with root partition. The nitrate nitrogen accumulation both in soil of faba bean and maize strip with no root partition were higher than that of with root separation in faba bean/maize intercropping. When faba bean intercropped with no maize, faba bean nitrogen uptake with no root separation were significantly higher than that of with root partition, yet there existed no difference between root partition and no root partition for soil nitrogen accumulation in blank soil. And plant nitrogen uptake and nitrate nitrogen accumulation varied little between root separation and no root separation in faba bean/maize intercropping with no faba bean.