| 清耕与覆草措施对枣树叶水势的影响 |
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| 引用本文： | 张 俊,李建贵,杜 研,陈辉惶.清耕与覆草措施对枣树叶水势的影响[J].西北农业学报,2012,21(5):155-152. |
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| 作者姓名： | 张 俊 李建贵 杜 研 陈辉惶 |
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| 作者单位： | 1. 新疆农业大学林学与园艺学院,乌鲁木齐,830052
2. 新疆农业大学科研处,乌鲁木齐,830052 |
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| 基金项目： | 自治区科技厅支撑计划课题项目，自治区科技厅条件平台建设项目 |
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| 摘 要： | 从生态节水理念出发,以阿克苏市红旗坡农场棉花试验基地内的2.67hm2枣园为研究对象,对枣园采取清耕与覆草措施,比较两者的水分状况,以达到节水灌溉的目的。同时对清耕与覆草措施下枣树叶水势的日、季变化规律及影响因子进行分析。结果表明,清耕与覆草措施的枣树叶水势日变化均值分别为(-1.23±0.66)MPa和(-1.14±0.60)MPa,季变化均值分别为(-1.24±0.12)MPa和(-1.17±0.10)MPa。覆草措施的枣树叶水势明显高于清耕措施,两者日变化曲线均呈单谷型,季变化均呈"V"型,这种变化规律是枣树适应该地区生境的生理特征之一。清耕与覆草措施枣树叶水势的日变化与气温、大气相对湿度、辐射照度有十分显著的相关性,季变化与土壤水势也有十分显著的相关性。清耕与覆草措施下枣树叶水势与蒸腾量也呈线性相关,土壤水势下降,蒸腾加快,叶水势降低;土壤水势上升,蒸腾减弱,叶水势回升。
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| 关 键 词： | 清耕 覆草 枣树 叶水势 日、季变化 影响因子 |
Influence on Leaf Water Potential of Cleaning Tillage and Covering Straw on Ziziphus jujuba Mill |
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| ZHANG Jun,LI Jiangui,DU Yan and CHEN Huihuang.Influence on Leaf Water Potential of Cleaning Tillage and Covering Straw on Ziziphus jujuba Mill[J].Acta Agriculturae Boreali-occidentalis Sinica,2012,21(5):155-152. |
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| Authors: | ZHANG Jun LI Jiangui DU Yan and CHEN Huihuang |
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| Institution: | 1(1.College of Forestry and Horticulture,Xinjiang Agriculture University,Urumqi 830052,China; 2.Management of Scientific Research,Xinjiang Agriculture University,Urumqi 830052,China) |
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| Abstract: | From the ecological water-saving theory,the 2.67 hm2 of jujuba(Ziziphus jujubea Mill.) orchard of the experimental base of cotton in the Hongqipo farmland of Aksu city as the research object,cleaning tillage and covering straw were used and the water conditions were compared,so as to achieve the purpose of saving water irrigation.Meanwhile,the daily and seasonal variation of leaf water potential of the cleaning tillage and straw covering for jujuba and related factors were analyzed.The daily average leaf water potential of cleaning tillage and straw covering were(-1.23±0.66) MPa and(-1.14±0.60) MPa,respectively.The seasonal average water potential of cleaning tillage and straw covering were(-1.24±0.12)MPa and(-1.17±0.10)MPa,respectively.The leaf water potential under straw covering was higher than that of cleaning tillage.Both daily average variations were single-valley curves,and both seasonal average variations were V-shape curves.This was a combined function of both internal and external factors,and reflected one of physiological characteristics of Chinese jujuba adaptable to the local site.Close correlation could be found between the both variations of leaf water potential and temperature,relative humidity,illumination.Leaf water potential has a negative correlation to air temperature and intensity of illumination,and a positive correlation to air humidity.Evident positive correlation existed between the variation of leaf water potential and soil water potential,and linearity correlation existed between leaf water potential and evapotranspiration quantity.The transpiration went up and the leaf water potential went down while the soil water potential decreased;the leaf water potential was still lower when the transpiration and the soil water potential increased,the leaf water potential recovered when the transpiration decreased. |
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| Keywords: | Cleaning tillage Straw covering Ziziphus jujuba Mill Leaf water potential Daily and seasonal variation Influence factors |
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