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OALib Journal期刊
ISSN: 2333-9721
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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
DOI: 10.3724/SP.J.1145.2011.00809, PP. 809-813
Keywords: 添加硅,紫花苜蓿,土壤水分,土壤氮,土壤磷,土壤钾
Abstract:
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（medicagosativa）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.图1表3参22
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