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以浙江嘉兴和衢州两个为期10年的定位试验资料为基础,应用Jenny方程对土壤有机质平衡过程作数学模拟研究,得出在该条件下两地的土壤有机质矿化率和年矿化量,分别为4.04%和5.08%,1.347和1.221t/hm2,推算出在稻田每年投入45t/hm2厩肥或不施肥条件下对土壤有机质平衡的长期影响:若稻田每年施入45t/hm2厩肥,60年之后,土壤的有机质含量将趋至平衡,嘉兴和衢州稻田的土壤有机质含量将分别达到50.4g/kg和49.2g/kg;而不施肥区仅仅依靠稻田根茬残留作为有机物料的补充来源,两地的土壤有机质含量将最终分别下降至22.5g/kg和16.0g/kg。维持无肥区土壤有机质平衡的有机物年需要量为3～5t/hm2。
Based on the two 10-year experimental data of Jiaxing and Quzhou in Zhejiang Province, the Jenny equation was used to simulate the process of soil organic matter balance, and the mineralization rate of organic matter and annual mineralization in the two places were obtained. Which is 4.04% and 5.08%, 1.347 and 1.221t / hm2, respectively. The long-term effects on the balance of soil organic matter under the condition of 45t / hm2 of manure input or non-fertilization in paddy fields are calculated. After that, the content of soil organic matter will tend to balance, and the contents of soil organic matter in Jiaxing and Quzhou paddy fields will reach 50.4g / kg and 49.2g / kg, respectively; while the non-fertilization area relies only on the residue of rice stubble as the supplementary source of organic materials. Soil organic matter content will eventually decline to 22.5g / kg and 16.0g / kg, respectively. The annual organic matter needed to maintain the balance of soil organic matter in the area without fertilizer is 3 ~ 5t / hm2.