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田间试验于1984年秋播开始,分别在淮阴县渔沟乡、新渡乡和涟水县胡集乡的淤土、二合上和沙土上进行、试验设4个处理:O、CK,施过磷酸钙375,1125,2250,3375kg/hm~2。稻麦轮作,种植5a 共10季作物。主要研究结果如下:1.应用 looke 经验公式(P=R√t+b)和倒数方程(1/P_1=1/P_0+1/t)求得的土壤磷释放速率常数 R 值和最大释放量 P_0值和土壤水溶性磷,Olscn-P,Colwclc-P 及植株吸
Field trials began in the autumn of 1984 and were carried out on the silt, on the ground and on the soil in Yugou Township, Xindu Township and Huji Township, Lianshui County, Huaiyin County respectively. There were four treatments: O, CK, Calcium phosphate 375,1125,2250,3375kg / hm ~ 2. Rice and wheat rotation, planting 5a total of 10 seasons crops. The main results are as follows: 1. Using the looke empirical formula (P = R√t + b) and reciprocal equation (1 / P_1 = 1 / P_0 + 1 / t), the soil phosphorus release rate constant R and the maximum release P_0 value and soil water-soluble phosphorus, Olscn-P, Colwclc-P and plant absorption