Effect of row spacing configuration and density regulation on dry matter production and yield in cotton
Row spacing configuration and plant density are critical factors influencing cotton yield and fiber quality.In Xinjiang,cotton is primarily planted using a wide-narrow row spacing system,though equal row spacing is also used.However,there is ongoing debate regarding the effectiveness of these two methods.To clarify this,a two-year field experiment was conducted using the cotton variety Zhongmian 88.A split-plot design was employed,with row spacing configurations (equal row spacing and wide-narrow row spacing) as the main plot and planting densities 12×104 plants hm-2 (D1),16×104 plants hm-2 (D2),and 18×104 plants hm-2 (D3) as the sub-plots.The study aimed to compare the effects of row spacing configuration and plant density on cot-ton population growth,dry matter accumulation and distribution,as well as yield and fiber quality.The results showed that the growth rate of leaf area index (LAI),the peak LAI,and the proportion of reproductive organ biomass at the boll opening stage were higher in both equal rows spacing and wide-narrow row spacing at intermediate density (16×104 plants hm-2) compared to the other treatment combinations,with no significant differences between the two configurations.Additionally,no significant differences were found among treatments for cotton growth rate (CGR),net assimilation rate (NAR),and boll growth rate (BGR).Over the two years,seed cotton yields were similar for equal row spacing and wide-narrow row spacing at medium density,with no significant differences in fiber quality.A comprehensive analysis over both years concluded that under medium density,both row spacing configurations can achieve optimal yield and fiber quality.This study provides a scientific basis for selecting row spacing configurations and planting densities for cotton cultivation in Xinjiang.
cottonsingle and double row configurationsdensitiesgrowth indicatorsdry matter accumulation and partitioningyield and quality
万方数据
维普
