摘要
[目的]研究不同底肥施用量对肥力较低的滨海黏质脱盐土条件下的稻茬麦产量构成和氮肥吸收利用率的影响。[方法]采用随机区组试验设计，以苏北地区主要栽培品种之一的淮麦28为试验材料，研究了稻茬麦底肥用量对小麦茎蘖动态、产量结构、花后旗叶SPAD值动态变化、旗叶面积及氮肥吸收利用率的影响。[结果]较高磷肥投入对小麦茎蘖动态变化、产量结构、花后旗叶SPAD值、叶面积、氮肥利用率均有明显促进作用，以尿素150 kg／hm2＋磷酸二胺300 kg／hm2小麦产量和经济效益最高。[结论]在肥力较低的滨海黏质土壤条件下，应该重视氮、磷肥平衡施用，充分发挥作物的生产潜能。
Abstract
Objective]To research the dosage of different base fertilizers on yield components, nitrogen use efficiency of wheat after cutting rice under the condition of the inshore glue desalting soil.[Method] Huaimai 28, one of the main varieties of Northern Jiangsu, was used to study the effects of different base fertilizers on wheat stem tillers dynamics, yield components, the SPAD value variation after flowering, flag leaf area and nitrogen use efficiency by using the method of randomized block design.[ Result] Higher P fertilizer input played an active role in wheat stem tillers dynamics, yield components, the SPAD value variation after flowering, flag leaf area and nitrogen use efficiency.And 150 kg/hm2 urea+300 kg/hm2 DAP (diammonium phosphate) could obtain the maximum yield and economic benefits.[Conclusion] Under the condition of the inshore glue desalting soil, we must pay more attention to the balance of nitrogen and phosphate fertilization to give full play to the crop production potential.
基金项目
江苏省农垦农业科学研究院2016年农业科研项目(2016－02)
国家科技期刊平台
NSTL
维普
万方数据