| 不同土壤水分条件下硅对紫花苜蓿生理特性及品质的影响 |
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| 引用本文： | 刘慧霞,王康英,郭正刚.不同土壤水分条件下硅对紫花苜蓿生理特性及品质的影响[J].中国草地学报,2011,33(3). |
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| 作者姓名： | 刘慧霞 王康英 郭正刚 |
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| 作者单位： | 1. 西北民族大学生命科学与工程学院,甘肃,兰州,730030
2. 兰州大学草地农业科技学院,甘肃,兰州,730020 |
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| 基金项目： | 国家自然科学基金，中国博士后科学基金(200801242)特别资助 |
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| 摘 要： | 采用盆栽试验研究了不同土壤水分条件下硅对紫花苜蓿生理特性及品质的影响.结果表明:土壤含水量为饱和含水量的80%和35%时,外源性硅对紫花苜蓿地上生物量没有显著影响,而土壤含水量为饱和含水量的50%和65%时,外源性硅显著增加了紫花苜蓿地上生物量;土壤含水量为饱和含水量的80%时外源性硅对紫花苜蓿叶片SOD活性、丙二醛和脯氨酸含量没有显著影响,土壤含水量为饱和含水量的65%时外源性硅显著降低了紫花苜蓿叶片SOD活性,而对丙二醛和脯氨酸含量没有影响,土壤含水量小于或等于饱和含水量50%时外源性硅显著降低了紫花苜蓿茎叶SOD活性、丙二醛和脯氨酸含量(P＜0.05);添加硅对紫花苜蓿茎叶比、粗纤维、粗蛋白质和类胡萝卜素含量没有显著影响.说明添加外源性硅提高了紫花苜蓿遭受水分亏缺胁迫时的抗氧化能力,减轻了水分亏缺对紫花苜蓿的伤害程度,但对紫花苜蓿牧草品质影响不大.
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| 关 键 词： | 土壤含水量 紫花苜蓿 渗透调节 抗氧化能力 牧草品质 |
Effect of Silicon on Some Physiological-biochemical Characteristics and Quality of Alfalfa under Different Soil Moistures |
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| LIU Hui-xia,WANG Kang-ying,GUO Zheng-gang.Effect of Silicon on Some Physiological-biochemical Characteristics and Quality of Alfalfa under Different Soil Moistures[J].Chinese Journal of Grassland,2011,33(3). |
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| Authors: | LIU Hui-xia WANG Kang-ying GUO Zheng-gang |
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| Institution: | LIU Hui-xia1,WANG Kang-ying1,GUO Zheng-gang2(1.College of Life Science and Engineering,Northwest University for Nationalities,Lanzhou 730030,China,2.College of Pastoral Agricultural Science and Technology,Lanzhou 730020,China) |
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| Abstract: | A pot experiment was carried out to determine the effect of silicon on physiological characteristics and forage quality of alfalfa under the different soil moistures.The results showed that silicon increased the biomass of alfalfa when the soil moisture was 50% or 65% of field water capacity,and did not affect the biomass when the soil moisture was 35% or 80% of field water capacity.Addition of silicon did not effect on the SOD activity,proline and malonaldehyde content in leaves of alfalfa when the soil mo... |
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| Keywords: | Soil moisture Alfalfa Osmoregulation Oxidation resistance Forage quality |
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