小麦蚕豆间作对作物根系活力、蚕豆根瘤生长的影响*

 通过田间试验研究了小麦、蚕豆间作条件下不同施氮水平对小麦、蚕豆根系活力和蚕豆根瘤生长状况的影响，结果表明：氮肥施用对作物根系活力、蚕豆根瘤生长及作物产量均有显著影响，在同样氮素水平下间作小麦的根系活力均比单作小麦高，如孕穗期在N₀,N₉₀,N₁₈₀,N₂₇₀分别增加了0.91%，3.5%，3.0%，2.4%；而间作蚕豆的根系活力均低于单作蚕豆：如开花期在N₀,N₉₀,N₁₈₀,N₂₇₀分别降低了1.3%，28.1%，13.7%，5.7%；间作蚕豆根瘤数均高于单作蚕豆，如结荚期在N₀,N₉₀,N₁₈₀,N₂₇₀分别提高了13.6%，31.4%，5.4%，30.6%，随施氮量的增加，根瘤数均呈减少的趋势。间作蚕豆产量结果是N₁₈₀>N₉₀>N₀>N₂₇₀ ，间作小麦产量结果是N₁₈₀>N₂₇₀>N₉₀>N₀。

Effects of Wheat and Broad Bean Intercropping on the Root Activity and Root Nodulation of Broad Bean

Field experiment was carried out to investigate the effect of nitrogen fertilizer on root activity of broad bean and wheat, and broad bean’s nodule growth situation in wheat/broad bean intercropping system.The result showed that the effect of nitrogen fertilizer on output and the land equivalent of intercropping were significant.In the same nitrogen fertilizer, wheat root activity in intercropping was higher than monoculture system, in the boot stage N₀,N₉₀,N₁₈₀,N₂₇₀ separately enhanced 0.91%，3.5%，3.0%，2.4%.otherwise broad bean root activity in intercropping was lower than monoculture; in the bloom stage N₀,N₉₀,N₁₈₀,N₂₇₀ separately reduced 1.3%，28.1%，13.7%，5.7%.The broad bean nodules were more than monoculture, in the bear pots stage N₀,N₉₀,N₁₈₀,N₂₇₀ separately enhanced 13.6%，31.4%，5.4%，30.6%.With the increasing of nitrogen fertilizer the nodules of broad bean were decreased. Broad bean output of bears fruit is N₁₈₀>N₉₀>N₀>N₂₇₀ and wheat yields is N₁₈₀>N₂₇₀>N₉₀>N₀ in intercropping system.