棉花学报2025，Vol.37Issue(3)：221-234,14.DOI:10.11963/cs20240073
行距与密度对长江流域机采棉株型和产量的影响
Effects of row spacing and planting density on plant architecture and yield of mechanically harvested cotton in the Yangtze River Basin
摘要
Abstract
[Objective]This research aimed to investigate the optimal row spacing and planting density of mechanically harvested cotton in the Yangtze River Basin.[Methods]Field trials were conducted in Changsha,Yueyang,and Hengyang Cities in Hunan Province in 2024,using the JX0010 cotton variety as the experimental material.The main plot included three row spacing treatments:90 cm(L1),83 cm(L2),and 76 cm(L3),while the subplot had three planting density treatments:60 000 plants·hm-2(D1),75 000 plants·hm-2(D2),and 90 000 plants·hm-2(D3).The plant architecture,aboveground dry matter mass,net photosynthetic rate(Pn),chlorophyll content(soil and plant analyzer development,SPAD value),leaf area index(LAI),and yield traits were compared under different treatments.[Results]At the same row spacing,as planting density increased,plant height tended to increase,while the number of fruiting branches,stem diameter,and length of the fourth fruiting branch tended to decrease.The height of the first fruiting branch was higher under L1D3 treatment.At the full squaring stage,the aboveground dry matter mass per plant tended to increase with the increasing of planting density at the same row spacing.The dry matter mass of stems,leaves,reproductive organs,and whole plant were higher under L1D3 treatment at the full squaring stage,full flowering stage,full boll-setting stage,and boll opening stage.At the full flowering stage and full boll-setting stage,Pn was higher under the D2 treatment at the same row spacing;at the boll opening stage,Pn tended to increase with the increasing of planting density,and Pn was higher under L1D3 treatment.At the same row spacing,SPAD value and LAI(except for the L1 treatment in Changsha at the full squaring stage)increased with the increasing of planting density from the full squaring stage to boll opening stage.The L1D3 treatment had the highest number of bolls per plant.Under the same row spacing,seed cotton yield and lint yield increased with the increasing of planting density,with L1D3 treatment showing the highest seed cotton yield and lint yield,which were significantly higher than the other seven treatments(expcept L2D3 treatment)at both Yueyang and Hengyang test sites.[Conclusion]Under the conditions of this experiment,the optimal row spacing for JX0010 cotton is 90 cm,and the optimal planting density is 90 000 plants·hm-2.关键词
棉花/行距/密度/产量/株型/光合性能/长江流域棉区Key words
cotton/row spacing/density/yield/plant architecture/photosynthetic performance/cotton-growing region of the Yangtze River Basin引用本文复制引用
隋鲁鹏,刘爱玉,江又红,赵世浩,周仲华,徐姣,成芳,张永莉,谢章书,荣志凌,王方园,朱家军,李飞..行距与密度对长江流域机采棉株型和产量的影响[J].棉花学报,2025,37(3):221-234,14.基金项目
湖南省棉花产业技术体系栽培与良种繁育岗位专家项目(湘农发[2022]31号) （湘农发[2022]31号）
湖南省棉花科技创新项目(湘财建指[2024]162号) （湘财建指[2024]162号）
