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研究了冀东地区主要高产土壤———褐土的有机质适宜范围、土壤有机质矿化率、9种有机肥 (物 )料的腐殖化系数及主要栽培作物的根茬残留率。结果表明 ,冀东地区小麦、玉米合计产量 1 35 0 0～ 1 5 0 0 0kg/hm2 的高产农田有机质适宜范围 1 2～ 2 0g·kg-1,有机质矿化率 2 5 8%～ 3 92 % ,9种有机肥 (物 )料腐殖化系数1 4 1 5 %～ 6 0 83% ,小麦、玉米根茬残留率 1 7 8%～ 2 5 2 % ,据此确定了保持土壤有机质平衡及逐步提高土壤有机质含量所需有机肥 (物 )料用量 ,实现了该区土壤有机质的定量调控
The suitable range of organic matter, soil organic matter mineralization rate, humification coefficient of nine kinds of organic fertilizer (material) and the stubble residue rate of main cultivated land were studied in this paper. The results showed that the suitable range of organic matter in high-yielding farmland was 1320 ~ 20g · kg-1, and the mineralization rate of organic matter was 25.8% ~ 392, with a total output of wheat and maize in the range of 1350 ~ 1500kg / hm2 %, 9 kinds of organic fertilizer (material) humification coefficient of 1415 ~ 6083%, wheat, corn stubble residue rate of 17.8% ~ 25.2%, thus determined to maintain soil organic matter balance And the amount of organic fertilizer (material) needed to gradually increase the organic matter content of soil, the quantitative regulation of soil organic matter