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以吉林省德惠市8年黑土田间定位试验的小区土壤为研究对象,对不同耕作方式下土壤硬度和容重进行研究.结果表明:免耕增加了土壤硬度,主要表现在2.5～17.5cm土层;在玉米连作和玉米-大豆轮作下,苗眼处免耕处理的最大土壤硬度分别为2816和1931kPa,秋翻处理下分别为2660和2051kPa,对作物生长均没有限制作用;秋翻处理的土壤硬度曲线随垄形而变化,免耕处理的土壤硬度曲线起伏较小.与秋翻相比,免耕显著增加了5～20cm土层的土壤容重.5～30cm土层的土壤容重在免耕处理下变化幅度较小,在秋翻处理下随土壤深度的增加逐渐增大.土壤容重与土壤硬度之间相关性不显著.
The soil hardness and bulk density under different tillage methods were studied in the plot of 8-year black soil field experiment in Dehui, Jilin Province. The results showed that no-tillage increased the soil hardness, mainly in 2.5 ~ 17.5cm soil layer ; Under the continuous cropping of corn and corn-soybean rotation, the maximum soil hardness of no-tillage at the seedling eye was 2816 and 1931 kPa, respectively, which were 2660 and 2051 kPa under the autumn turn-over respectively, with no restriction on crop growth; The curve of hardness changes with ridge shape, and the curve of undravated soil hardness has little fluctuation. Compared with autumn turning, no-tillage significantly increased the soil bulk density of 5 ~ 20cm soil layer. Under the treatment of autumn fall, the soil bulk density increased gradually with soil depth increasing.The correlation between soil bulk density and soil hardness was insignificant.