盐池沙地退化草场植被恢复与流沙防治效果分析_凌侠.pdfVIP

25 　4 Vol.25　No.4 2004 12 Dec.2004 Journal of Inner Mongolia Agricultural University :1009-3575(2004)04-003 -03 1 2 1 1 , 　 , 　, 　 (1., 　1000 3;2., 　010019) :　、, 。 :, , 66.3%～ 214%, , , 1.54 。, 0cm ～ 40cm 0.01 mm 、、、、, , , , , +。 :　;　;　;　;　 　S 12.　　 　A : : ANALYSIS ON VEGETATION RESTORATION AND DRIFTING-SAND CONTROL ON SANDY DEGRADED GRASSLAND IN YANCHI 1 2 1 1 LING Xia , 　DONG Zhi , 　SUN Bao-ping , 　YANG Guang (1.　Beijing forestry university, Beijing, 1000 3;2.　Inner Mongolia agricultural university, Huhhot, 010019) Abst act:　In this paper, by investigating soil, field vegetation, and surface w ind erosion status, combining in- door analysis, the effect of vegetation recovery on sandy degraded grassland in Yanchi is studied.The results show that:after the process of protective growth, grazing rest and reseeding, the plant species and vegetation coverage are increased, and biomasses are enhanced about 66.3214, at the same time, the effect of the measure of combining protective growth, grazing rest and reseeding is better than that of single protective grow th and grazing rest, the formers biomass is 1.54 times more than the latter.With the fixing of drifting-sand and the recovering of vegetation in demonstration area, the contents of physical clay minerals, organic matter, total N, available P and available K are all increased compared w ith those on drifting-sand.The thickness of w ind ero- sion in drifting-sand control area is reduced, and the thickness is different in different vegetati