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辽宁省西北部风沙土主要分布于东北科尔沁沙地边缘,面积较大约有2926000亩。风沙土土壤瘠薄,风蚀严重,易春旱、秋吊,耕作粗放,粮食产量低而不稳。针对上述问题我们在彰武县章古台公社对风沙土的耕作措施进行了调查,并在所内进行了试验研究,情况概述于下。一、春旱特点风沙土(即风积沙土),土质松散,无结构,质地为沙粒。90%以上的土壤颗粒粒径在0.5～0.05毫米之间,土壤组成以粗沙粒和细沙粒为主(按我国土壤颗粒的分级标准)。土壤母质为颗粒均匀的石英砂,粒径在0.5～0.05毫米之间。粘粒很少,成土作用微弱,非毛管孔隙多,毛管孔隙少。渗水性强,保水性差。水分在耕层中保蓄量很少,即使在湿润的情况下,也只能含有7～10%的水分。地表不易看到径
Sandy soil in northwestern Liaoning Province is mainly distributed in the northeastern Horqin Sandy margin, an area of about 2926000 acres. Windy soil Soil infertility, severe wind erosion, easy spring drought, autumn hanging, extensive farming, low and unstable grain yield. In view of the above problems, we investigated the tillage measures of aeolian sandy soil in Zhanggutai Commune, Zhangwu County, and carried out pilot studies in this area. The situation is summarized below. First, the characteristics of spring drought Sandy soil (Aeolian sand), loose soil, no structure, the texture of sand. More than 90% of the soil particles have a diameter of 0.5-0.05 mm. The soil consists mainly of coarse grains and fine grains (according to the grading standards of soil particles in China). Soil parent material as uniform quartz sand, particle size between 0.5 ~ 0.05 mm. Small clay, fissures into soil weak, non-capillary pores, capillary pores less. Water seepage, poor water retention. Moisture reserves in plowed very little, even in wet conditions, it can only contain 7 to 10% of the water. The surface is not easy to see the path