Study on Soil Amenlioration Effect of Planting Grasses in Wind – Sandy Land of Yellow River Floodplain

27 Mar Study on Soil Amenlioration Effect of Planting Grasses in Wind – Sandy Land of Yellow River Floodplain

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Abstract

通过野外取样与室内分析相结合的方法, 研究了黄泛平原风沙化土地种植高丹草、无芒雀麦、黑麦草、阿 尔冈金苜蓿、沙打旺、草木樨后的土壤改良效果。 结果表明:与对照风沙土相比, 牧草种植区的土壤容重减小, 土壤 总孔隙度、毛管孔隙度与非毛管孔隙度增加, 持水性能提高;土壤中的有机质、碱解氮、速效磷、速效钾含量分别提高 了 14.29%～ 126.53 %、22.72 %～ 376.15 %、12.72%～ 364.09 %和 17.78 %～ 114.76%, 但不同牧草改良土壤的效 果不同, 豆科牧草对土壤的改良效果优于禾本科牧草。

English Abstract

The soil amelioration effect of planting Sorghum sudanense , B romus inermis Leyss , Lolium perenne , Medicago sativa cv .Algonquin , Astragalus adsurgens , Melilotus suaveolens in w ind -sandy land
of Yellow River floodplain w ere studied by field testing and indoor analysis .The results show ed that
planting grasses directly influenced the physical features and nutrient contents in soil .Compared with control , the soil bulk density decreased , w hile total soil porosity , capillary porosity , non -capillary porosity
and w ater binding capacity increased ;at the same time, the content of organic matter , alkali -hydrolysable N , available P and available K raised by 14 .29 % to 126 .53 %, 22 .72 % to 376 .15 %, 12 .72 % to
364.09 % and 17 .78 % to 114 .76 % respectively , and then the amelioration effect w as different with different grasses , and the effect of 3 kinds leguminous grasses w as superior to 3 kinds of germanous grasses .
Planting grasses was of great significance to ameliorating soil , preventing and controlling soil and w ater
loss , developing grass industry and promoting accord development of ecology and economy in wind -sandy
land of Yellow River floodplain .