难降解性
The content of recalcitrant organic carbon,residual carbon from acid hydrolysis increased somewhat in all the treatments,except Treatment N,with Treatment NPK+OM being the most significant(p<0.05),while Recalcitrance index(RIC),rose significantly in Treatment K but fell significantly in Treatments N and NPK+OM(p<0.05).
与对照相比,除了单施氮处理外,其他施肥处理下土壤难降解有机碳(酸解残余碳)含量均呈增加趋势,也以NPK+OM的作用最明显(p<0.05);单施钾肥显著提高有机碳的难降解性(p<0.05),但单施氮和NPK+OM处理显著降低有机碳的难降解性指数(R IC,p<0.05)。