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试验结果指出,~(14)C标记的秸秆在淹水土壤中的年矿化量较旱地土壤中的高。旱地土壤中~(15)C秸秆前期矿化较淹水土壤快,但半月以后,均低于淹水土壤。不同用量试验结果表明,秸秆施用量与土壤有机质年矿化率之间呈显著性正相关,表明有机肥施用量愈大,土壤有机质矿化愈快。~(14)C秸秆配合无机氮肥施用,可提高~(14)C秸秆碳的矿化量。本文初步回顾了国内外有关文献,认为有机肥在水田和旱地中的分解特征似还未清楚.由于影响因子较为复杂,对于一些基本概念,如淹水土壤中有机质的分解和积累等问题,仍有待进一步研究和阐明。
The results showed that the annual mineralization amount of ~ (14) C-labeled straw in flooded soil was higher than that in dry land. The upland mineralization of ~ (15) C straw in dry land was faster than that in flooded soil, but it was lower than that in flooded soil after half a month. The results showed that there was a significant positive correlation between straw application and annual mineralization rate of organic matter in soil, indicating that the greater the application of organic fertilizer, the faster the mineralization of soil organic matter. ~ (14) C straw combined with inorganic nitrogen fertilization can increase the amount of mineralized carbon of ~ (14) C straw. In this paper, the domestic and foreign literatures are reviewed, and it is unclear that the decomposition characteristics of organic manure in paddy field and dry land are still unclear.Because the impact of factors is complex, for some basic concepts such as the decomposition and accumulation of organic matter in flooded soil, To be further studied and clarified.