植株密度和空间分布对棉株光截获和籽棉产量的影响：综述
摘要：棉花等作物行内的光衰减受冠层结构影响，而冠层结构由地上茎部的大小、形状和方向决定。不同光截获水平会导致棉花一系列的形态、解剖、生理和生化变化。植物生长的生理决定因素包括光截获、光能利用率、干物质积累、生长持续时间和干物质分配等。在棉花生产中，最大限度地利用光能可以通过改变植株冠层成分结构影响冠层分布，从而产生最佳植株种群体的栽培措施来最大限度地利用光能来实现。本文重点分析了棉株空间分布和密度对棉花光截获的影响程度。棉花的枝条往往生长在向行间空间里生长，以避免荫蔽。，冠层组分结构的改变应避开荫蔽并争夺光照。较高密度下，尤其是开花期，最大叶面积指数越大，在棉花花期尤为显著，其种群数量较高，表明棉花产量较就越高。
Title: The impact of plant density and spatial arrangement on light interception on cotton crop and seed cotton yield: An overview
Authors: CHAPEPA Blessing,?MUDADA Nhamo?&?MAPURANGA Rangarirai
Abstract
Light attenuation within a row of crops such as cotton is influenced by canopy architecture, which is defined by size, shape and orientation of shoot components. Level of light interception causes an array of morpho-anatomical, physiological and biochemical changes. Physiological determinants of growth include light interception, light use efficiency, dry matter accumulation, duration of growth and dry matter partitioning. Maximum light utilization in cotton production can be attained by adopting cultural practices that yields optimum plant populations as they affect canopy arrangement by modifying the plant canopy components. This paper highlights the extent to which spatial arrangement and density affects light interception in cotton crops. The cotton crop branches tend to grow into the inter-row space to avoid shade. The modification of canopy components suggests a shade avoidance and competition for light. Maximum leaf area index (LAI) is obtained especially at flowering stage with higher populations which depicts better yields in cotton production.
Journal of Cotton Research. 2020, 3:18
https://doi.org/10.1186/s42397-020-00059-z
https://jcottonres.biomedcentral.com/articles/10.1186/s42397-020-00059-z
发布日期: 2020-07-31
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