Effects of Increasing Planting Density and Reducing Nitrogen Application on Yield of Silage Maize
Zhengqingzhu 1,Beinongqingzhu 368 and Zhengdan 958 were used as experimental materials,and the effects of nitrogen application,planting density and varieties on dry matter yield and fresh yield were studied.The results showed that dry matter yield and fresh yield were significantly influenced by nitrogen fertilizer,planting density and variety.At the same density level,the dry matter yield and fresh yield of the three varieties decreased with the decrease of nitrogen application.However,there was no significant difference between N1 and N2 treatments.Under the same nitrogen application level,the dry matter biological yield of the three maize varieties showed a trend of first increasing and then decreasing with the increase of density.The orders of dry matter yield of three maize varieties was Zhengqingzhu 1＞Beinongqingzhu 368＞Zhengdan 958 under high density and conventional nitrogen application(N1D3 and N1D4).The orders of dry matter yield of three maize varieties was Beinongqingzhu 368＞Zhengqingzhu 1＞Zhengdan 958 under low density and conventional nitrogen application(N1D1,N1D2)and reduction of nitrogen(N2 and N3).Therefore,the recommended planting density of Zhengqingzhu 1 and Beinongqingzhu 368 was 82500 plants/hm2 under the condition of 10%N reduction(N2),and Zhengdan 958 was not recommended for planting as silage maize,which can achieve the target of higher yield by increasing density and reducing nitrogen.
Silage maizeDry matter yieldNitrogen fertilizerPlanting density
万方数据
维普
