地下部分隔对间作小麦养分吸收和白粉病发生的影响

Effects of root separation on nutrient uptake of wheat and occurrence of powdery mildew under wheat-fababean intercropping

通过根系分隔的盆栽试验,探讨了地下部分隔对小麦//蚕豆间作系统中小麦的养分吸收和白粉病发生的影响。结果表明:根系不分隔小麦的生物量和N、P、K吸收量均大于尼龙网分隔处理和根系完全分隔处理。根系分隔方式还影响了小麦白粉病的发生,小麦白粉病的发病率和发病指数均表现为根系不分隔(I)<尼龙网分隔(M)<完全分隔(P)。表明地下部的相互作用改善了小麦的生长,提高了小麦抗白粉病的能力。

A pot experiment was conducted to study the effects of root separation on wheat growth, nutrient uptake and occurrence of powdery mildew in wheat and fababean intercropping. The results showed that wheat shoot biomass and the amounts of N, P, K uptake were higher without root separation （I） than those with either mesh separation （M） or solid separation （P）. Root separation also affected the occurrence of powdery mildew of wheat. Both infected leaf ratio and disease index of wheat powdery mildew followed the order of no root separation（I） 〈 mesh separation（M） 〈 solid separation（P）, indicating that the growth of wheat was enhanced and the resistance to powdery mildew of wheat was improved due to the interaction of roots.