| 红枣光合特性与水分利用效率日变化研究 |
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| 引用本文： | 柴仲平,王雪梅,孙霞,蒋平安,吴海华.红枣光合特性与水分利用效率日变化研究[J].西南农业学报,2010,23(1). |
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| 作者姓名： | 柴仲平 王雪梅 孙霞 蒋平安 吴海华 |
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| 作者单位： | 1. 新疆农业大学草业与环境科学学院,新疆,乌鲁木齐,830052
2. 新疆师范大学地理科学与旅游学院,新疆,乌鲁木齐,830054 |
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| 基金项目： | 自治区科技攻关，重点项目计划课题"果树营养特性与水肥耦合技术研究"，新疆农业大学草业与环境科学学院青年教师科研启动基金，土壤学自治区重点学科资助 |
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| 摘 要： | 通过对新疆农一师九团栽植5年树龄的红枣进行光合特性与水分利用效率日变化研究。结果表明:枣树叶片的Pn、Tr、Gs在日变化过程中均呈单峰曲线,但峰值出现的时间并不一致。峰值分别为21.2μmol.m-2.s-1、4.33 mmol.m-2.s-1、286.5mol.m-2.s-1,出现的时间为13:00、13:00和11:00。Ci的日变化曲线基本与Pn相反,9:00开始降低,11:00左右达到最低值,而Ls的日变化曲线基本与Pn相同,当Ci升高时Ls降低。WUE最高值为5.37μmolCO2.mmol-1H2O,出现在上午9:00,此后随着蒸腾速率的持续上升,水分利用效率开始下降。
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| 关 键 词： | 红枣 光合特性 水分利用效率 日变化 |
Research on Diurnal Variations of Photosynthetic Characteristics and Water Use Efficiency of Zizyphus jujube |
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| CHAI Zhong-ping,WANG Xue-mei,SUN Xia,JIANG Ping-an,WU Hai-hua.Research on Diurnal Variations of Photosynthetic Characteristics and Water Use Efficiency of Zizyphus jujube[J].Southwest China Journal of Agricultural Sciences,2010,23(1). |
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| Authors: | CHAI Zhong-ping WANG Xue-mei SUN Xia JIANG Ping-an WU Hai-hua |
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| Abstract: | The variations of photosynthetic characteristics and water use efficiency of Zizyphus jujube in 9 Mission of the first farming army of Xingjiang were studied. The results showed that diurnal variations of Pn , Tr and Gs of Zizyphus jujube leaves all took on a curve with one summit, but the emerging time of summit was different. Summit of Pn was 21.2 μmol·m~(-2)·s~(-1), summit of Tr was 4.33 mmol·m~(-2)·s~(-1), summit of Gs was 286.5 mol·m~(-2)·s~(-1), and their emerging time each was 13:00 Pm, 13:00 Pm and 11:00 Am. The curve of diurnal variations of Ci was contrary to Pn, it began decreasing at 9:00 Am and reached low at 11:00 Am, but the curve of diurnal variations of Ls was same to Pn. When Ci was increasing, Ls was decreasing. The summit of WUE was 5.37 μmol CO_2·mmol~(-1)H_2O, it emerged at 9:00 Am. After this, WUE began decreasing with Tr increasing. |
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| Keywords: | Zizyphus jujube Photosynthetic characteristics Water use efficiency Diurnal variations |
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