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锡林郭勒盟国营黑城子种畜场一分场从1975年起,用机械大垄压条法进行大面积造林3000多亩,收到了显著的防护效益,每年从林地中收优质干草60多万斤。这里原来是农用耕地,由于春季多风,土壤为多年风积的沙质淡栗钙土,又处在迎风口,风蚀严重。肥沃的表土被风揭走,形成了许多锅底坑,个别地方深达1米。严重的沙化,致使种粮不收;种草不长。(见照片)
Since 1975, a large-scale afforestation has been carried out on a large area of 3000 mu with a mechanical wide-ridge-pressing method, and a significant protection benefit has been received. More than 60 kg of high-quality hay are harvested from the woodlands every year. Here is the original farmland, due to windy spring, the soil for many years of windy sand Xiaotianli soil, and in the mouth, wind erosion serious. The rich topsoil was exposed by the wind and formed many pot pits, some 1 meter deep in some places. Serious desertification, resulting in grain does not accept; grass is not long. (See photo)