河南农业大学学报2018，Vol.52Issue(3)：397-403,7.
减少底肥施用量和农药施用次数对小麦条锈病、白粉病及产量的影响
Effects of dosage of fertilizer and times of pesticides use on wheat stripe rust, powdery mildew and yield
摘要
Abstract
In order to provide scientific basis for the cultivation and management of wheat " double reduction",this paper studies the effect of reducing dosage of base fertilizers and pesticide spraying times on the disease occurrence and yield of wheat by using Zhengmai 103,Zhengmai 101,Zhoumai 18 and Aikang 58 as experimental materials.The experiment set three dosage levels of base fertilizers(habit dosage,reducing habit dosage 20％,reducing habit dosage 40％),and three levels of pesticide spraying times(to prevent wheat strip rust and powdery mildew twice by spraying pesticide,reducing once,reducing twice),to study the effect of at different fertilizer and pesticide levels on wheat disease occurrence and yield.The results show that different dosages of base fertilizer had no effect on the basic seedling number and the effect on the tiller number before the winter,the maximum tiller number,the effective tiller number and the production was positively correlated.Compared with the habit dosage of base fertilizer,the reduction of the yield was very small under reduction of habit dosage by 20％; while the reduction of the yield was greater under the reduction of habit dosage by 40％.The different treatment times of powdery mildew and stripe rust had certain influence on the disease index of the experimental variety,but had positive correlation with the yield.if we reduce pesticide spraying once,the yield reduction will be small.If we reduce pesticide spraying twice,the yield reduction will be large.In terms of economic benefits,combined with the cost estimation of fertilizers,pesticides and other costs,the economic benefit is the highest at the level of reducing habit dosage by 20％and disease prevention once.In conclusion,under the precondition of the current fertility level,if we reduce 20％of the base fertilizer and prevent powdery mildew and strip rust once,the optimal planting benefit of wheat can be achieved.关键词
小麦/减量/底肥用量/农药喷施次数/白粉病/条锈病/产量Key words
wheat/reduction/dosage of base fertilizer/spray pesticide times/powdery mildew/strip rust/yield分类
农业科技引用本文复制引用
柳东阳,雷振生,晁岳恩,姜军,吴政卿,杨攀,汪庆昌,李文旭,李巍,车军..减少底肥施用量和农药施用次数对小麦条锈病、白粉病及产量的影响[J].河南农业大学学报,2018,52(3):397-403,7.基金项目
河南省重大科技专项(151100111100) （151100111100）
