沼液施肥对杨树林地土壤微生物量碳氮的影响
China Forestry Science and Technology(2015)
Abstract
沼液是沼气发酵过后的液体残留物,是一种优质的有机肥料.研究了不同沼液施肥对杨树林地土壤微生物量碳氮的影响.结果表明:施用沼液可以提高土壤微生物量碳、氮的含量,微生物量碳、氮含量增加范围分别为4.29% ~ 61.62%和6.08% ~ 76.10%,土壤微生物量碳氮含量随沼液施用量增加逐渐提高.土壤微生物量碳氮呈正相关.土壤微生物量碳氮比随沼液施用量增加逐渐下降,其变化范围为9.92 ~ 10.81,土壤微生物量碳氮比与微生物量碳、氮含量负相关.
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