关键词: 大蒜, 大蒜, 产量, 氮素供应目标值, 有机氮矿化

Abstract:

For the study of soil water-soluble organic carbon in long-term fertilization under the conditions of the evolution of features, this study since 1988 through the beginning of the application of organic manure, chemical fertilizer and organic fertilizer chemical fertilizer facilities in vegetable soils of long-term water-soluble organic carbon (WSOC) content of conducted a study, analysis of soil water-soluble organic carbon content and changes in the distribution profile. With the B group (chemical fertilizer) than, A group (organic fertilizer and organic manure + chemical fertilizer) water-soluble organic carbon content increased significantly; 0-20cm ,20-40cm ,40-60cm soil layer of organic fertilizer 3 and nitrogen fertilization treatment with water-soluble organic carbon content with the increase of the amount of nitrogen fertilizer reduced; the processing water-soluble organic carbon content of 0-20cm soil highest in three layers of high and low high-trend. Long-term fertilization treatment showed that the soil water-soluble organic carbon in the soil Cultivation fertilization is sensitive to the application of organic manure can increase the water-soluble organic carbon content of soil.