上海地区水稻土,60年代以来由于三熟制的发展,土壤淹水时间延长,且湿耕辗压,致使土壤物理环境恶化,耕层变浅,犁底层上升增厚土壤发僵,通气性变差,尤其是一些质地粘重的土壤如淘干泥等土体紧实,更易引起上层滞水,发根困难。为了改变这种不良状况,我们于秋播耕翻前,应用了“深松土犁”进行深松土,以改善这种紧实土壤的 In the paddy soils of Shanghai area, since the development of three-cropping system in the 1960s, the prolonged flooding of soil and the wet rolling resulted in the deterioration of the physical environment of the soil and the tilth of the tilth of the plow. Poor, especially some of the texture sticky soil, such as Amoy dry clay and other soil compaction, more likely to cause the upper stagnant water, hair root difficulties. In order to change this kind of bad situation, we applied “deep loess plow” for deep loosening before autumn tillage to improve the compaction soil