山西农业大学学报（自然科学版）2017，Vol.37Issue(6)：390-395,401,7.
无根系竞争时田间密植对高粱光合色素的影响
Effects of close planting on photosynthetic pigments in field grown sorghum under absence of root competition
摘要
Abstract
[Objective]The objective of this paper was to study the effects of mutual shading on photosynthetic pigments under close planting in field-grown sorghum (Sorghum bicolor).[Methods]In the absence of mineral deficiency,we investigated the effects of planting density on population light environment,photosynthetic pigments and SPAD (Soil and Plant Analyzer Development) value.[Results]Increased planting density not only induced a distinct decline in light intensity,but also resulted in a significant increase in chlorophyll content;the chlorophyll content increased gradually with increased leaf position in the upper canopy of the population at the medium and high planting density,but it decreased in low planting density;compared with sorghum grown at high planting density,the lower canopy leaves at medium planting density had longer duration of stay green and photosynthetic function,while the senescence speed of lower canopy leaves was quicker at low planting density.[Conclusion]Under absence of root competition,close planting induce a marked increase in chlorophyll content,and the chlorophyll content increase gradually with increase leaf position in the upper canopy;to increase planting density not only modifies the duration of stay green,but also promotes the optimization of photosynthetic function in individual plants.关键词
高粱/种植密度/相互遮阴/叶绿素Key words
Sorghum/Planting density/Mutual shading/Chlorophyll分类
农业科技引用本文复制引用
李涛,王卫锋,姜闯道..无根系竞争时田间密植对高粱光合色素的影响[J].山西农业大学学报（自然科学版）,2017,37(6):390-395,401,7.基金项目
国家自然科学基金项目(30871455) （30871455）
山西农业大学科技创新基金项目和博士引进人才支持计划项目(2015YJ25) （2015YJ25）
北京市自然科学基金项目(6122025) （6122025）
