山东农业大学学报（自然科学版）2025，Vol.56Issue(5)：874-879,6.DOI:10.3969/j.issn.1000-2324.2025.05.016
密度对露地直播春棉经济性状的影响
Planting Density on Economic Traits of Spring open-field direct-seeded cotton
摘要
Abstract
To determine the optimal varieties and planting densities for spring open-field direct-seeded cotton in Northwestern Shandong,as well as to mitigate plastic film pollution,this experiment adopts a two-factor randomized block design,using four conventional spring cotton varieties(strains)-Demian 10,Demian 13,Demian 14,and Demian 16 as experimental materials,with three density treatments:high(9×104 plants·ha-1),medium(6.75×104 plants·ha-1),and low(4.5×104 plants·ha-1).Taking the local conventional planting mode of these four varieties as the control,the study explores the effects of density on key agronomic traits,dry matter accumulation,yield,and fiber quality of spring open-field direct-seeded cotton.The results show that with the increase of planting density,the number of fruit branches,number of bolls per plant,boll weight,and lint percentage of each variety significantly decrease.The plant height first decreases and then increases.The dry matter weights of roots,stems,leaves,boll shells,unginned cotton and single plant all significantly reduce.Fiber quality is mainly influenced by variety,and the micronaire value significantly decreases with increasing density.Variety,density and interaction of variety by density are the main factors affecting unginned cotton yield.The variety DM10 at a planting density of 9×104 plants·ha-1 achieves the highest unginned cotton yield of 4 934.84 kg·ha-1,which is equivalent to the yield of CK4,with a source sink ratio of 0.43.These findings indicate that selecting suitable varieties and optimal planting densities for spring open-field direct-seeded cotton can effectively mitigate residual plastic film pollution at its source.关键词
密度/露地直播/棉花/经济性状/品种密度互作Key words
Density/open-field direct-seeded/cotton/economic traits/interaction of variety by density分类
农业科技引用本文复制引用
董灵艳,李凤瑞,史加亮,赵文超,王汝明,张东楼,齐洪鑫,张爱民,杨秀凤..密度对露地直播春棉经济性状的影响[J].山东农业大学学报（自然科学版）,2025,56(5):874-879,6.基金项目
山东省现代农业产业技术体系棉花创新团队(SDAIT-03-05) （SDAIT-03-05）
山东省农业良种工程(2020LZGC002) （2020LZGC002）
德州市市级研发计划项目(德科字[2020]59号) （德科字[2020]59号）
