本文通过灰漠土中磷的分级实验以及磷的各个形态与有效磷的关系实验,认为磷肥施加到灰漠土中后主要以Cag-p的形式积累。它在土壤中的含量随施加磷肥的增加而增加。Cala-p和O-p在10年的过程中没有变化。而cas-p与土壤有效磷没有显著的相关关系,ca2-p与有效磷则显著相关。如何降低Cag-P的积累量并促使cag-P向ca2-P转化是提高灰漠土有效磷的根本途径。在无机肥、有机无机复合肥的实验中,单施加无机肥会增加土壤对磷的吸附。施加秸杆可以降低土壤对磷的吸附,同时,也降低了磷的解吸 ...
兰中东
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2010年4-9月,以巢湖富磷地质区池塘为试验对象,测定了叶绿素a与不同形态磷的浓度以及藻类的数量和组成,分析了沉积物藻类可利用性磷(AAP)含量与磷平衡浓度,提取并用分子生物学方法鉴定了沉积物无机磷细菌的主要种类。结果表明,沉积物溶解总磷与AAP含量显著正相关 ...
陈玺 +4 more
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