论文部分内容阅读
分布于长江三角洲大江南北的高沙土并非由古河床物质抬升形成,而是较深海滨波浪运动的结果.土质沙性,蓄水力差,属沙瘦型低产土壤.由于地下水埋深在1米以上,表土有夜潮现象,三麦易受渍害,超深耕疏松犁底层,开好地面沟,并建立地表复被可以改良.改种水稻,推广一红二黑三绿”可提高土壤有机质.在水源不足的地区,可实行三旱三熟制或二早一水制.因土种植豆类、油菜、花生和胡萝卜等作物,相应地发展榨油、制粉等加工副业,从而建立起更高水平的经济结构.从而使土壤由低级的无序演变到高级的有序状态.
The high sandy soil distributed in the north and south of the Yangtze River delta is not formed by the uplifting of ancient riverbed material, but the result of deep seaside wave movement. The sandy soil with poor water storage capacity is sandy and low yielding soil. , The top soil has the phenomenon of night tide, three wheat susceptible to stains, ultra-deep plow loose plow bottom, open the surface ditch, and the establishment of surface re-quake can be improved. Replanting rice to promote a red two black three green "can improve soil organic matter. In areas with insufficient water resources, three or three crops may be used to produce water, and some crops such as legumes, rape, peanuts and carrots will be planted for processing crops such as oil extraction and milling, thereby creating more A high level of economic structure that will allow the soil to evolve from a low level of disorder to a high level of order.