不同有机碳源对滇池沿湖大棚土壤水溶性氮、磷调控的研究

采用大田试验方法，研究了5龄大棚土壤在不施肥（CK）、常规施肥（C14）、混合秸秆粉（CF）和褐煤粉（MF）4种处理下对土壤水溶性氮、磷调控的影响。结果表明，在不影响作物产量的前提下，CF、MF和CK与CH相比均能降低土壤水溶性氮含量水平，而CF、MF可促进土壤水溶性磷解吸；CF、MF与CK相比，CF促进土壤水溶性磷的释出，MF抑制了土壤水溶性磷的释出。

A Research on the Regulation of Water Soluble Nitrogen and Phosphorus in the Green House Soil around Lake Dianchi by the Different Organic Sources

In the field test, the green house soil with five different ages has been tested with four treatments to study its water soluble nitrogen and phosphorus when there is no fertilizer application （CK）, or with regular fertilizer application （CH）, or applied with mixed crop straw powder （CF） or grinded brown coal （MF）. The results show that when the crop yield is not affected, the content of water soluble nitrogen in the soil is reduced under the treat- ments of CF, MF and CK rather than CH. The desorption of the water soluble phosphorus in the soil could be enhanced by CF and MF. When CF and MF are compared with CK, CF could help release the water soluble phosphorus in the soil while MF does the opposite.