农业科学研究2024，Vol.45Issue(1)：38-43,6.
秸秆还田下种植密度对玉米产量及土壤理化性质的影响
Effects of Planting Density on Maize Yield and Soil Physicochemical Properties under Straw Returning
摘要
Abstract
To investigate the effects of different planting densities on maize yield and soil physicochemical properties under straw return,and to screen out the optimal maize planting density under straw return,this experiment used Xianyu 335 as the test material.Under the condition of straw returning,three planting densities were set:WF(67 500 plants/hm2),WSF(82 500 plants/hm2)and WSFR(97 500 plants/hm2).The effects of different planting densities on the physicochemical properties of soil and maize yield in the cultivated layer were analyzed.The results show that the contents of total nitrogen,alkaline nitrogen,fast-acting phosphorus,fast-acting potassium and organic matter all increased first and then decreased with the increase in planting density,reaching the highest at a planting density of 82 500 plants/hm2.The total salt,bulk weight and porosity increased with increased planting density.The number of grains per panicle and the 100-grain weight decreased with the increase in planting density,showing a negative correlation,while the number of panicles per hectare and yield significantly increased with planting density,showing a positive correlation.The highest yield was 1 065.79 kg/667 m2 at a density of 97 500 plants/hm2.From the viewpoint of yield,WSFR(97 500 plants/hm2)is the optimal planting density,and from the viewpoint of soil nutrients,WSF(82 500 plants/hm2)is the optimal planting density.关键词
秸秆还田/种植密度/玉米/土壤理化性质/产量Key words
straw return/planting density/maize/soil physicochemical properties/yield分类
农业科技引用本文复制引用
马楠,康建宏,吕开源,谭小敏,刘素..秸秆还田下种植密度对玉米产量及土壤理化性质的影响[J].农业科学研究,2024,45(1):38-43,6.基金项目
宁夏高质量发展与生态保护科技创新示范项目(NGSB-2021-3-02) （NGSB-2021-3-02）
宁夏自然科学基金项目(2021AAC03072) （2021AAC03072）
宁夏重点研发项目(2019BBF02003) （2019BBF02003）
