The Decomposition and Accumulation of Soil Organic Matter under Film Mulching

doi:10.7668/hbnxb.1991.01.017

Abstract

Abstract: The decomposition of field-returned organic matter under film mulching was slightly higher than that under open ground cultivation, the humusifica-tion factor being 0.17-0.41, and the annual mineralization per mu (1/16 hectare) 92-164 kg. Application of mixed organic fertilizer and mineral fertilizer contributed more organic matter to soil than non-application, and only application of chemical ferilizer or organic fertilizer. Especially for undccompo-sed organic matter, appropriate application of chemical fertilizer is obviously superior than that of thoroughly decomposed organic fertilizer of equal amount of nitrogen. Therefore, it is necessary for recombine agronomic practices to adjust the relationship between the decomposition and accumulation of soil Organic matter.

Key words: Film mulching, Organic matter, Humusif ication factor, Rate Of mineralization

LiuJincheng, YangJingqiu, BaiChengyun. The Decomposition and Accumulation of Soil Organic Matter under Film Mulching[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(1): 99-104. doi: 10.7668/hbnxb.1991.01.017.

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