减量施肥对滴灌冬小麦生长、产量及养分利用的影响

目的]研究不同化肥减施对滴灌冬小麦生长、产量及肥料利用率的影响,分析最佳的减肥模式,为滴灌冬小麦化肥减施提供理论依据.方法]以常规施肥(N240 P105 K37.5)和空白处理(N0 P0 K0)为对照,设置4个减肥处理,测定滴灌冬小麦的产量及构成、农艺性状、干物质和肥料利用率.结果]与常规种植相比,4个减肥处...

Effects of Fertilizer Reduction on Growth,Yield and Fertilizer Utilization of Winter Wheat under Drip Irrigation

【Objective】 Effects To study the effects of different chemical fertilizer reduction patterns on growth, yield and fertilizer utilization of winter wheat under drip irrigation were studied,in order to providewith the view of providing theoretical basis for chemical fertilizer reduction of winter wheat under drip irrigation and finding out,Conducted the best pattern to reduce fertilizer. 【Method】 The control was conventional farm household (N₂₄₀P₁₀₅K_37.5) and blank treatment (N₀P₀K₀),as the control, set up 4 fertilizer reduction treatments were set up to determine, the yield and composition, agronomic characters, dry matter and fertilizer use efficiency of winter wheat under drip irrigation were investigated. 【Result】 Compared with conventional farmers, there were significant differences in yield, grain per spike and 1,000-grain weight among the four treatments, the highest yield was 9,673.54 kg/hm² treated with T₃, 36.8% of increase production. The trend of dry matter accumulation under reduced fertilization was consistent with conventional farmers and blank control, and it increased rapidly in the jointing stage, reaching the maximum value in the mature stage; Compared with T₅, the dry matter transport before and after anthesis of T₃ treatment increased by 30.2% and 29.4%, respectively; There were no significant differences in dry matter transport volume, transport rate and grain contribution rate among other treatments. The four indexes of spikelet number, panicle length, plant height and grain weight per panicle of T₃ treatment were highest, which were 16.57, 6.69 cm, 84.87 cm and 2.13 g. The agricultural efficiency of N and P fertilizer increased from 1.6-20.19 kg/kg and 5.13-59.00 kg/kg, respectively, compared with control treatments. And the partial productivity increased from 2.25-45.53 kg/kg and from 5.13-116.91 kg/kg. 【Conclusion】 There was no significant effect on the yield of winter wheat under drip irrigation using fertilizer reduction, and the rational application of nitrogen and phosphorus fertilizer was beneficial to increase the yield. Comprehensive comparative analysis showed that T₃ model (N₂₄₀P_52.5 K_37.5) was more suitable in our area.