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在江苏扬州黄粘土上设置免耕、少耕田间试验,并取上述大田土壤进行盆栽试验,测定作物生产力,探索土壤且巴力自调效应。结果表明,土壤自身对容重有自调功能,种植1年稻、麦后,容重小的逐步变大,大的逐步变小。砂壤土和黄粘土容重极差由0.6降到0.2和0.27(稻季),麦季极差降到0.12和0.17。自调速率以砂壤土为快。随时间的推移,不同容重渐趋自调点1.3g/cm~3左右,这种自调性在田间不同耕法处理区得到了重视。土壤养分、
No-tillage and less-tillage field trials were conducted on yellow clay in Yangzhou, Jiangsu Province. Pot experiments were conducted on the above-mentioned field soils to determine crop productivity and explore soil self-tuning effects. The results showed that the soil itself has the function of self-tuning to the bulk density. After planting rice and wheat for one year, the bulk density gradually increased and the bulk gradually became smaller. The bulk density of sandy loam and yellow clay ranged from 0.6 to 0.2 and 0.27 (rice season), respectively, with extremely poor wheat to 0.12 and 0.17. Self-tuning rate of sandy loam to fast. With the passage of time, the different volumetric weights gradually become self-regulating point of about 1.3g / cm ~ 3, this self-regulation in the field of different tillage processing area has been valued. Soil nutrients,