论文部分内容阅读
多年的研究证明,每年深耕30厘米以上和深翻松土耕作层到40～90厘米,一方面保证农作物增产有2.3～17.1依赖于土壤,另一方面却引起土壤有机质强烈分解从而降低了它的潜在肥力,发展了浸蚀过程,增加了劳动和资金消耗。如根据A·A·沙依泽夫(1968)的资料,南部碳酸盐黑土13年剧烈耕作减低了20厘米土层10％的腐殖质含量,30年要达20％。分析结果是在“阿列赫”库尔斯克禁伐区获得的。
Years of research have shown that cultivating more than 30 cm of deep tillage and deep tillage to 40 to 90 cm deep each year ensures that the increase of crop yields from 2.3 to 17.1 depends on the soil and on the other hand leads to the strong decomposition of soil organic matter and thus to its reduction Potential fertility, the development of the erosion process, an increase of labor and capital consumption. According to AA Shaishev (1968), vigorous cultivation in the southern carbonate soils for 13 years reduced the 10% humic content of 20 cm soils by 20% in 30 years. The results of the analysis were obtained in the “Alleged” Kursk felling area.