| 缩节胺(DPC)对不同密度下棉花冠层结构特征与产量性状的影响 |
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| 引用本文： | 罗宏海,赵瑞海,韩春丽,张旺锋.缩节胺(DPC)对不同密度下棉花冠层结构特征与产量性状的影响[J].棉花学报,2011,23(4):334-340. |
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| 作者姓名： | 罗宏海 赵瑞海 韩春丽 张旺锋 |
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| 作者单位： | 石河子大学新疆兵团绿洲生态农业重点实验室;农学院,石河子832003 |
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| 基金项目： | 国家自然科学基金项目，国家科技支撑计划项目 |
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| 摘 要： | 在新疆气候生态条件下,设置适量化调和超量化调方式,每个化调下设3个种植密度,研究了化学调节剂(DPC)对不同密度棉花冠层结构及产量的影响.结果表明:随密度增加,两种化调量下均表现叶面积指数(LAI)增大、叶倾角(MFA)变大,株型变紧凑；但密度过大,群体散射辐射透过系数(TR)小,造成生育后期群体光合速率(CAP)较快...
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| 关 键 词： | 化学调节剂 种植密度 冠层结构 产量性状 棉花 |
Effects of Growth Regulators(DPC) on Canopy Architecture and Yield Characteristics of Cotton under Different Planting Densities |
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| LUO Hong-hai,ZHAO Rui-hai,HAN Chun-li,ZHANG Wang-feng.Effects of Growth Regulators(DPC) on Canopy Architecture and Yield Characteristics of Cotton under Different Planting Densities[J].Cotton Science,2011,23(4):334-340. |
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| Authors: | LUO Hong-hai ZHAO Rui-hai HAN Chun-li ZHANG Wang-feng |
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| Institution: | The Key Laboratory of Oasis Eco-agriculture of Xinjiang Production Construction Group/College of Agriculture,Shihezi University, Shihezi 832003, China |
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| Abstract: | In order to study the effect of growth regulators (DPC) on canopy architecture and yield characteristics of cotton at different planting densities, two elements experiment with two levels of growth regulator and three plant densities was conducted. Results showed that under different levels of growth regulator, the leaf area index(LAI) and mean foliage angle(MFA) increased as planting density increased, while the canopy transmission coefficiency for radiation penetration(TR) decreased. Very high planting density impacted the canopy structure negatively, resulting in a rapid decline of canopy photosynthetic rate(CAP). The LAI, MFA and CAP decreased with the amount of growth regulator increasing, but TR increased. Although light interception index and dry matter weight reduced, the proportion of dry-matter distributing to the reproductive organs increased rapidly. The LAI, MFA and CAP displayed a highly significant positive correlation with boll number and yields of lint at later full bolling and boll opening stage. The TR correlated negatively with dry matter of above-ground from flowering to boll opening stage. Therefore, enhancement of leaf area, mean foliage inclination angle and photosynthesis capacity during full bolling and boll opening stage could lead to increase of yield of lint. |
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| Keywords: | planting density canopy structure yield characteristics cotton |
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