| 保水剂对冬小麦土壤水分和光合生理特征的影响 |
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| 引用本文： | 杨永辉,吴普特,武继承,黄占斌,冯浩,管秀娟,何方.保水剂对冬小麦土壤水分和光合生理特征的影响[J].中国水土保持科学,2010,8(5):36-41. |
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| 作者姓名： | 杨永辉 吴普特 武继承 黄占斌 冯浩 管秀娟 何方 |
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| 作者单位： | [1]西北农林科技大学资源环境学院 ,陕西杨凌712100 [2]河南省农业科学院植物营养与资源环境研究所,郑州450002 [3]中国科学院水利部水土保持研究所,陕西杨凌712100 [4]中国矿业大学（北京）,北京100083 |
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| 基金项目： | 国家863节水农业项目，河南省杰出青年基金项目 |
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| 摘 要： | 为探明保水剂施用对冬小麦不同生育期的土壤水分、叶片相对含水量及光合生理等的作用,采用保水剂大田试验,研究分析了冬小麦不同生育时期保水剂对土壤水分动态变化、叶片相对含水量及光合特征等的影响。结果表明:1)从返青期到孕穗期,随保水剂用量的增加,020cm土壤含水量显著提高,且2040 cm土壤水分均提高,其基本表现为:60 kg/hm2>90 kg/hm2>30kg/hm2>对照。2)叶片相对含水量表现为:拔节期,随保水剂用量的增加,叶片相对含水量降低,但均显著高于对照（P0.05）,但均显著高于对照（P<0.05）。3)冬小麦各生育期的光合生理特征表现为:用量为60kg/hm2的光合速率、蒸腾速率及叶片水分利用效率均相对最高,而30和90kg/hm2保水剂用量结果各异,但均显著高于对照（P<0.05）。综上所述,保水剂显著提高了冬小麦各生育期的土壤水分、叶片相对含水量及其光合速率、蒸腾速率及水分利用效率等,且以60kg/hm2保水剂用量的效果为佳。
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| 关 键 词： | 冬小麦 保水剂 土壤水分 叶片相对含水量 光合特征 |
Effects of water-retaining agent on soil moisture, photosynthesis characteristics of Triticum aestivum L. |
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| Yang Yonghui,Wu Pute,Wu Jicheng,Huang Zhanbin,Feng Hao,Guan Xiujuan,He Fang.Effects of water-retaining agent on soil moisture, photosynthesis characteristics of Triticum aestivum L.[J].Science of Soil and Water Conservation,2010,8(5):36-41. |
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| Authors: | Yang Yonghui Wu Pute Wu Jicheng Huang Zhanbin Feng Hao Guan Xiujuan He Fang |
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| Institution: | 1.College of Resource and Environmental Sciences,Northwest A ＆ F University,712100,Yangling,Shaanxi;2.Institute of Plant nutrition ＆ Resource Environment,Henan Academy of Agricultural Sciences,450002,Zhengzhou;3.Institute of Soil and Water Conservation,Chinese Academy of Sciences ＆ Ministry of Water Resources,712100,Yangling,Shaanxi;4.China University of Mining ＆ Technology-Beijing,100083,Beijing： China) |
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| Abstract: | In order to investigate the characteristics of soil moisture,leaf relative water content（LEWC） and photosynthesis of Triticum aestivum L.in different growth stages,the field trial,which researched the effect of water-retaining agent（WRA）（0,30,60,90kg/hm2） on soil moisture,leaf relative water content and photosynthetic characteristics,was carried out.The results indicated that 1） soil moisture in 0-20cm deep soil increased obviously from returning green stage to booting stage with the increase of the WRA.Meanwhile,the WRA added soil moisture in 20-40cm deep soil in different growth stages of Triticum aestivum L.and soil moisture were as follows： 60kg/hm2 90kg/hm2 30kg/hm2 CK（0kg/hm2）.2） LEWC indicated that at jointing stage,LEWC decreased with the increase of the WRA but evidently higher than CK,while was were no difference between 90kg/hm2 and 30kg/hm2 of the WRA.At booting stage,LEWC of 90kg/hm2 was highest compared with other treatments and that of CK was lowest.At grain-filling stage,there was no difference remarkably between the treatments of the WRA but evidently higher than CK.3） Photosynthetic characteristics of Triticum aestivum L.in different growth stages were as follows： photosynthetic rate,transpiration rate and leaf water use efficiency were relatively highest under the 60kg/hm2 of water-retaining agent compared with other treatments of the WRA,while that of 30kg/hm2 and 90kg/hm2 were different but higher than CK.In all,the WRA significantly increased soil moisture,leaf water potential,photosynthetic rate,transpiration rate and leaf water use efficiency and its suitable or recommended dosage was 60kg/hm2. |
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| Keywords: | Triticum aestivum L water-retaining agent soil moisture leaf relative water content photosynthetic characteristics |
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