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七十年代,江苏太湖地区双、三熟制和机耕面积较大。在土壤耕作上有多耕多耙,种稻带水旋耕,种麦烂耕烂旋烂种等不合理做法。生产上出现了土壤物理性状变差,渍害较重、青泥化明显、秋耕作业困难、整地质量不良、影响三麦稳产增产等情况。目前双、三熟制面积有较多下降,但这些情况仍然存在。针对这一问题,1980年起,我们在该地区主要类型的水稻土上,研究了免耕法的应用效果。现阐述免耕后土壤肥力演变和作物产量变化的趋势,并讨论改进土壤耕作技术的途径。
In the seventies, Jiangsu and Taihu Lake areas double, three cooked and plow larger. In the tillage on the soil there are more tillage rake, rice water rotary tillage, rotten rotten cultivated rotten species and other unreasonable practices. Production appeared on the decline of soil physical properties, stains heavier, obvious green mud, autumn plowing operations difficult, poor quality of soil preparation, affecting the three wheat stable yield increase and so on. At present, the area of double and triple cropping has more decline, but these situations still exist. In response to this problem, since 1980, we have studied the application effects of no-tillage on the main types of paddy soils in the region. The trends in soil fertility evolution and crop yield change after no-till are presented, and ways to improve soil-tillage techniques are discussed.