| 不同土壤水分条件下添加硅对紫花苜蓿茎叶和土壤氮磷钾含量的影响 |
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| 引用本文： | 刘慧霞,郭正刚.不同土壤水分条件下添加硅对紫花苜蓿茎叶和土壤氮磷钾含量的影响[J].应用与环境生物学报,2011(6):809-813. |
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| 作者姓名： | 刘慧霞 郭正刚 |
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| 作者单位： | 西北民族大学生命科学与工程学院;兰州大学草地农业科技学院; |
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| 基金项目： | 国家自然科学基金项目(No.30900173); 中国博士后科学基金首批特别项目(No.200801242)资助~~ |
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| 摘 要： | 为提高植物氮磷钾利用能力,采用盆栽试验研究了不同土壤水分条件下添加硅对紫花苜蓿(Medicago sativa)茎叶和土壤氮、磷、钾含量的影响.结果表明,土壤含水量为饱和含水量的35%和80%时添加硅对紫花苜蓿生物量没有明显影响,而土壤含水量为饱和含水量的50%和65%时则显著提高了紫花苜蓿生物量(P<0.05);添加硅对紫花苜蓿茎叶内氮含量没有显著影响,但显著提高了茎叶内钾和磷含量(P<0.05);添加硅对土壤全氮、速效氮、全钾和全磷含量没有显著影响,而显著提高了土壤速效磷含量(P<0.05),显著降低了土壤速效钾含量(P<0.05).说明添加硅能够显著增加紫花苜蓿茎叶内磷和钾的积累量,刺激土壤速效磷释放,降低土壤速效钾含量.
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| 关 键 词： | 添加硅 紫花苜蓿 土壤水分 土壤氮 土壤磷 土壤钾 |
Effects of Supplementary Silicon on Nitrogen, Phosphorus and Potassium Contents in the Shoots of Medicago sativa Plants and in the Soil Under Different Soil Moisture Conditions |
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| LIU Huixia & GUO Zhenggang.Effects of Supplementary Silicon on Nitrogen, Phosphorus and Potassium Contents in the Shoots of Medicago sativa Plants and in the Soil Under Different Soil Moisture Conditions[J].Chinese Journal of Applied and Environmental Biology,2011(6):809-813. |
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| Authors: | LIU Huixia & GUO Zhenggang |
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| Institution: | LIU Huixia1 & GUO Zhenggang2(1College of Life Science and Engineering,Northwest University for Nationalities,Lanzhou 730030,China)(2College of Pastoral Agricultural Science and Technology,Lanzhou University,Lanzhou 730020,China) |
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| Abstract: | A pot experiment was carried out to determine the effect of supplementary silicon on nitrogen,phosphorus and potassium contents in the shoots of alfalfa(Medicago sativa) plants and in the soil under different soil moisture conditions.The results indicated that supplementary silicon had no effect on the biomass of alfalfa plants when the soil moisture was 35% or 80% of field water capacity but significantly increased the biomass of alfalfa plants when the soil moisture was 50% or 65% of field water capacity(... |
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| Keywords: | supplementary silicon Medicago sativa soil moisture soil nitrogen soil phosphorus soil potassium |
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