近似法计量施用有机肥料对培肥水稻土土壤的研究

用近似法计量施用有机肥培肥土壤,测定土壤有机质矿化率和农肥及作物根茬的腐殖化系数。5a试验结果表明,土壤有机质矿化率在轻壤质良水型水稻土上平均为2.44%,轻壤质滞水型水稻土上平均为1.39%。有机质的腐殖化系数:马粪为35%～40%;猪粪为28%～34%;水稻根茬为45%。根据上述结果,计算了有机肥的建议施肥量,该计算值在水稻土上基本符合生产实际情况。

Studies on the approximate calculation of organic fertilizer application to ameliorate rice soil

The approximate calculation was applied to determine the application of organic fertilizer and to test organic matter mineralization rate in rice soil and decomposition and humification coefficient of crop stubble. The results of five year experiment showed that organic matter mineralization rate in rice soil with light quality and abundant moisture was 2.44 percent, and 1.39 percent in the soil with light quality and water detention. The decomposition and humification coefficient of organic matter is 35 to 40 percent in horse manure, 28 to 34 percent in swine manure, and 45 percent in rice stubble. Based on the results above, the suggestive application amount of organic fertilizer was calculated and the value was accordant with the reality of production.