In order to improve the fertility of purple soil and make reasonable use of green manures,root exudates of three types o......

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为了解福建省三明市石壁镇油茶林紫色土的土壤养分状况,为平衡施肥提供参考,采用土壤养分状况系统研究法对该地油茶林土壤养分限制......