| 刈割对热研13号柱花草光合特性的影响 |
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| 引用本文： | 刘震,刘金祥,张世伟.刈割对热研13号柱花草光合特性的影响[J].草原与草坪,2009(1):55-57. |
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| 作者姓名： | 刘震 刘金祥 张世伟 |
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| 作者单位： | [1]甘肃农业大学草业学院,甘肃兰州730070 [2]湛江师范学院热带草业科学研究所,广东湛江524048 |
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| 摘 要： | 在盆栽条件下，用20，40和60d3个刈割周期与5，15和25cm3种留茬高度组合为9个刈割处理，对热研13号柱花草的光合特性进行研究。结果表明：刈割周期和留茬高度的互作对柱花草光合特性的影响，气孔导度（Gs）和蒸腾速率（Tr）达到显著水平，其他指标均不显著。高频次低留茬（20d5cm）刈割处理的柱花草光合速度（Pn），Gs，胞间C02间浓度（Ci）和Tr均最高，分别达到了20．52umol CO2／（m^2·s），0．49umol／（m^2·s），318．89uL／L和11．32mmol／（m^2·s）。而低频次高留茬（60d25cm）刈割处理柱花草的WUE最高，达到了2．75umol CO2／（mmol·H2O）。
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| 关 键 词： | 刈割 柱花草 光合特性 |
Effect of defoliation on photosynthetic characteristics of Stylosanthes guianenesis cv. Reyan No.13 |
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| LIU Zhen,LIU Jin-xiang,ZHANG Shi-wei.Effect of defoliation on photosynthetic characteristics of Stylosanthes guianenesis cv. Reyan No.13[J].Grassland and Turf,2009(1):55-57. |
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| Authors: | LIU Zhen LIU Jin-xiang ZHANG Shi-wei |
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| Institution: | 1.College of Pratacultural Science;Gansu Agricultural University;Lanzhou730070;China;2.Institute of Tropical Pratacultural Science;Zhanjiang Normal College;Zhanjiang 524048;China |
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| Abstract: | The effect of defoliation on the photosynthetic characteristics of Stylosanthes guianenesis cv.Reyan No.13 was studied with potted plant and 9 treatments,involving 3 defoliation intervals(20,40 and 60 days) and 3 stubble heights(5,15 and 25 cm).The results showed that the effect of different defoliation intervals and stubble heights on net photosynthetic rate(Pn),stomatal conductance(Gs) and transpiration rate(Tr) was significant(P<0.01),but it was not significant on intercellular CO2 concentrations(Ci) and... |
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| Keywords: | defoliation Stylosanthes guianenesis cv Reyan No 13 photosynthetic characteristics |
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