| 土壤水势对桃树几个生理指标变化的影响 |
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| 引用本文： | 贺军奇,赵宝峰.土壤水势对桃树几个生理指标变化的影响[J].河北农业大学学报,2009,32(5). |
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| 作者姓名： | 贺军奇 赵宝峰 |
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| 作者单位： | 长安大学,环境科学与工程学院,陕西,西安,710054 |
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| 基金项目： | "干旱半干旱地区水文生态与水安全学科创新引智基地" |
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| 摘 要： | 土壤水势是描述土壤干旱程度及土壤水分对植物有效性的重要指标。通过在不同土壤水势条件下,测定桃树光合速率、蒸腾速率以及叶片水分利用效率,分析了不同土壤水势下各个生理指标随时间的变化规律。结果表明:桃树在1 d内光合呈双峰变化规律,具有明显的"午休"现象,蒸腾速率变化与光合变化特征相似,也呈双峰变化规律,土壤水势过高并不利于桃树对水分的利用,当土壤水势维持在-60~-40 kPa之间时,桃树叶片光合速率、平均蒸腾速率以及水分利用效率相对较高。综合分析表明,土壤水势控制在-60~-40 kPa时,桃树各生理指标变化均维持较高水平,有利于桃树生长。
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| 关 键 词： | 土壤水势 桃树 光合速率 蒸腾速率 |
Research on the impacts of soil water potential on a few physiological indicators of peach tree |
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| HE Jun-qi,ZHAO Bao-feng.Research on the impacts of soil water potential on a few physiological indicators of peach tree[J].Journal of Agricultural University of Hebei,2009,32(5). |
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| Authors: | HE Jun-qi ZHAO Bao-feng |
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| Institution: | HE Jun-qi,ZHAO Bao-feng(School of Environmental Science & Engineering,Chang'an University,Xi'an 710054,China) |
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| Abstract: | Soil water potential is an important indicator that represents the extent of soil moisture and effectiveness of water use.In this paper,the measurement of peach tree photosynthesis,transpiration rates,as well as leaf water use efficiency were identified in different soil water potential.Furthermore,analysis of the variety of physiological indicators with time in different soil water potential was conducted.The results revealed that the law of photosynthesis of peach tree in one day presented bimodal changes... |
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| Keywords: | soil water potential peach tree photosynthesis rate transpiration rate |
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