摘要:选取内蒙古温带典型草原,进行连续 6a 氮磷添加试验,采用土壤特征微生物 PLFA 生物标记技术,研究 6 个氮添加水平 N0(0 kg N hm-2 a-1) 、N1(56 kg N hm-2 a-1) 、N2(112 kg N hm-2 a-1) 、N3(224 kg N hm-2 a-1) 、N4(392 kg N hm-2 a-1) 、N5(560 kg N hm-2 a-1) 和 6 个磷添加水平 P0(0 kg P hm-2 a-1) 、P1(15.5 kg P hm-2 a-1) 、P2(31 kg P hm-2 a-1) 、P3(62 kg P hm-2 a-1) 、P4(93 kg P hm-2 a-1) 、P5(124 kg P hm-2 a-1
Fertilizer application is one of the most important management practices for improving soil fertility and increasing crop yield. However, it is far from certain how different forms of fertilizer affect the soil aggregate composition and carbon and nitrogen dynamics, especially for reddish paddy soils although it is one of the most popular soil types in China. A long鄄
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