摘要
在榆林的流动沙丘上,飞播后植物的幼苗受剧烈风蚀保存率很低。本文主要探讨用植物本身作障碍物来抵抗风蚀的效果。花棒(Hedysarum scopariumFisch et.Mey)、踏郎(Hedysarum mongolicum)不同播量的试验表明,适当提高播量,增加幼苗密度,林地能较为有效地抗抵风蚀,因而提高保存面积率。而初期幼苗稀疏的林地,经过几年之后都失败了。
As seeds air-sowed on moving dune of Yu-Lin Region are subjected tointense wind erosion,their survival percentage is very low.Tnis article mainlydeals with the effect of seeding as a barrierin resistance to wind erosion. Experiments by sowing different amounts of seeds of Hedysarum scopariumand Hedysarum mongolicum showed that if amount of seed used was higherand sowed properly,nigher density of seedlings would result,the dune wasbetter colonized and more resistant to wind erosion,consequently percentage ofsurvival was high.The area where early seedlings were sparse ended in failureafter a few years.
