摘要
[目的]为了明确江苏沿海地区NPK配施对小麦产量形成的影响,进而制定适合江苏沿海地区主要土壤类型和小麦种植的肥料基础配方。[方法]以江苏大面积种植品种春性小麦扬麦18为试材,通过田间试验和实验室分析,研究不同N肥、P肥、K肥配比施肥对小麦干物质积累、产量及构成的调控效应。[结果]不同NPK肥施肥水平对扬麦18产量均有显著的调节作用。在试验条件下,处理⑥(N2P2K2)产量最高,其次为处理⑦(N2P3K2),处理①(N0P0K0)产量最低。在促进小麦生长发育的N、P、K这3种营养元素中,N肥的增产效果最为明显。但是,当N肥的施用量超过一定的水平时,小麦产量则出现下降趋势,其中,处理N3P2K2的小麦产量比处理N2P2K2低498 kg/hm2。PK肥对小麦产量的效应也表现出相同的趋势。[结论]处理N2P2K2既能满足小麦对肥料的需求,又不使其异常生长,从而有利于增强植物的光合特性,提高灌浆强度。
Abstract [ Objective] The research aimed to identify the effect of N, P and K fertilizer on wheat yield in Jiangsu coastal area, then develop a fertilizer formula which was adequate for the specific soil types and wheat cropping system in Jiangsu coastal area. [ Method ] Take the spring wheat young wheat 18 which was planted in large area in Jiangsu as the test materials, and through field experiment and laboratory analysis,the regulating effect of different ratio of nitrogen fertilizer, phosphorus fertilizer and potash fertilizer on dry matter accumulation, yield and quality was studied. [ Result ] All levels of nitrogen fertilizer, phosphorus fertilizer and potash fertilizer played a significant regulatory role. In this experi- ment, the yield of treatment（~） （ N2 P2 K2 ） was the highest. The second was treatment（~）（ N2 P3 K2 ）. The lowest was treatment（~）. Nitrogen stimula- tion effect was the most obvious in the three nutrient elements nitrogen, phosphorus and potassium that could promote wheat growth and the devel- opment. But wheat production decreased when nitrogen content was above a certain level. The yield of treatment N3P2K2 was lower than that of treatment N^P2K2 by 498 kg,/hm2. The phosphorus effect on wheat yield also showed the same trend. [ Conclusion] Treatment N2P2K2 can satis- fy the demand for fertilizer, and its normal growth enhance photosynthetic characteristics of plants, and increase the strength of grouting.
出处
《安徽农业科学》
CAS
2013年第17期7496-7498,7501,共4页
Journal of Anhui Agricultural Sciences
基金
江苏省科技支撑计划资助项目(SBE 2012342)
江苏高校优势学科建设工程资助项目
