Effects of Fertilizer Level and Intercropping Planting Pattern with Corn on the Yield-Related Traits and Insect Community of Soybean

Intercropping of corn and soybean is widely practiced in agricultural production. However, few studies have investigated the effect intercropping fertilizer reduction on yield. In present study, were interplanted 2:2, 2:3 2:4 ratios. Two levels (normal: 600 kg/ha VS. reduced: 375 kg/ha) set. The effects planting patterns growth yield soybeans studied based changes enzyme activities related to nitrogen metabolism insect community field. results show that significantly reduced biomass, 100-seed weight soybean. also these yield-related traits; a decreasing trend was more obvious with decrease ratio. had greater plant than reduction. Reduction nitrogen-metabolism-related enzymes addition increased NR (nitrate reductase) activity R5, pattern negative Reduced only Pielou evenness index. application beneficial respect outbreak greenhouse whitefly. an can increase number species, as well Shannon–Wiener diversity index community, reduce Simpson dominance population important pest, green leafhopper. conclusion, C2S4 (two rows four soybean) scientific occurrence pests through ecological regulation does not enzymes-related most cases, ensuring