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一、国外流沙地飞播固沙的研究概况苏联第一次飞播于1931年秋,在达格斯坦自治共和国境内乌拉兹克尔的流沙地,播种梭梭和巨野麦。其效果正如M.彼得洛夫所总结的(1950),认为中亚细亚南部条件不同的沙漠地区的飞机播种的经验证明,在地下水位浅的半植被沙地上,效果最好;在植物生长条件较坏的沙漠深处,尤其是在裸露的新月形沙丘地上,由于种子常被吹到凹地去,幼苗易遭受沙暴和沙埋,因此飞播效果最差。为了提高飞播效果,必须预先在播种区的丘间低地上设置行列式或格状机械沙障。
I. Introduction to the Study on the Abstruct and Sand-fixation of Abandoned Sands Abroad The first Soviet effort of aerial seeding was carried out in the autumn of 1931 by sowing Haloxylon ammodendron and giant giant wheat in the quicksand of Uralsky in the Daghestan Autonomous Republic. Its effect, as summarized by M. Petrov (1950), suggests that the experience of aircraft seeding in deserts of different conditions in the southern Central Asia proved to be the best on semi-vegetation sandy land with shallow groundwater table. Deep in the bad deserts, especially on the crescent-shaped desert sand dunes, seedlings are most susceptible to sandstorms and sand as the seeds are often sunk into the valleys, resulting in the worst aerial seeding. In order to improve the effect of aerial seeding, it is necessary to set up a determinant or grid-shaped mechanical sand barrier in advance in the lowland of the mound in the sown area.