摘要
在低钾和中钾土壤上,采用田间试验研究了氮钾配施对弱筋小麦氮、钾养分吸收及产量和品质的影响。结果表明,氮钾肥配合施用促进了弱筋小麦植株氮、钾含量的提高,氮、钾养分吸收表现出一定的正交互作用;合理配施氮钾肥能够显著地提高弱筋小麦产量。在低钾土壤上,N180K150处理产量最高(5023 kg/hm2);中钾土壤上,最高产量(5145 kg/hm2)为N180K90处理。两种土壤上,氮肥的产量效应均大于钾肥。低钾土壤上,氮钾对小麦产量表现出极显著的正交互作用。提高氮肥用量显著降低了弱筋小麦的专用品质,钾肥对小麦品质的独立效应不显著,但是钾对氮的品质效应存在着交互作用。弱筋小麦抽穗期或灌浆期植株氮、钾含量与子粒品质的相关系数较大,与产量的相关系数则是以拔节期或抽穗期较大。适当减少氮肥用量和增加氮、钾肥基施比例有利于改善弱筋小麦的品质。
The field trials were conducted to study effects of combined application of nitrogen （N） and potassium （K） on nutrient uptake, grain yield and quality of weak gluten wheat on low-K and medium-K soils. The results showed that combination of N and K fertilizers could increase N and K content and absorption of wheat plant. There was a positive interaction of N and K on nutrient absorption. The rational combination of N and K fertilizer increased the yield of weak gluten wheat significantly. The treatment of N180K150 achieved the maximum yield of 5023 kg/ha in low-K soil while the N180K90 obtained maximum yield of 5145 kg/ha in medium-K soil. The yield response of wheat to N was more significant than that of potassium. The significant positive interaction of N and K fertilizer on the grain yield was found in low-K soil. The quality of weak gluten wheat was decreased notably with the increase of N rate in two soils. There was interaction between N and K on quality of weak gluten wheat while the effect of single K was not obvious. The correlation coefficients of N and K content with grain yield or quality were better at jointing and heading stages or at heading and filling stages, respectively. The quality of weak gluten wheat could be improved either by reducing N rate properly or increasing basal N and K ratios.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2007年第6期1054-1061,共8页
Journal of Plant Nutrition and Fertilizers
基金
国家和安徽省"粮食丰产工程"项目(2006BAD02A06)资助
关键词
氮钾配施
弱筋小麦
产量
品质
养分吸收
土壤供钾水平
combined application of N and K
weak gluten wheat
yield
quality
nutrients absorption
soil K supply level
