河西走廊内陆盐渍土生物修复与调控研究
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国家自然科学基金(40471083)


A Study of Bioremediation and Control on Inland Saline Soil in Hexi Corridor
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    摘要:

    分析了河西走廊内陆盐渍土的分布、类型和含盐特征。生物修复与调控试验研究表明,草甸盐土经种植碱茅草3 a,耕层土壤与对照相比脱盐率达77.00%,pH值下降了0.25个单位,容重降低0.14 g/m3,总孔隙度增加5.29%,团粒结构增加了23.14%,自然含水量增加70.30 g/kg。3年生碱茅草平均产草量36 000 kg/hm2(鲜重);盐化耕地采用以种植牧草为中介,将种植业与农区林业、畜牧业有机结合成互相依存,互相促进的农林牧复合生物系统治理后,土地利用率可达184.00%以上,可获得16 300~35 500元/hm2的经济收入,治理区农户人均纯收入由1 300.80元增加到2 160.70元,增加了66.00%。

    Abstract:

    The distribution,type,and salt characteristics of inland saline soil in the Hexi corridor were analyzed.Experiments of bioremediation and control were conducted with the alkali meadow grass planted in saline soil for 3 years.Contrasted with control group,topsoil desalination rate was up to 77.00%;pH value decreased 0.25 pH unit;soil bulk density decreased 0.14 g/m3;total porosity increased by 5.29%;soil aggregate structure increased by 23.14%;soil water content increased 70.30 g/kg;average triennial alkali grass yield was 36 000 kg/hm2(fresh weight).In addition,planting forage in saline soil as a medium and establishing a compound agro-forestry-animal system promoted the sound combination of planting industry,forestry,and livestock husbandry.Because of the reasons,utilization ratio of land reached more than 184.00%;the income of land increased from 16 300 to 35 500 yuan/hm2;average income per farmer in the controlling region increased by 66.00%,from 2 160.70 to 1300.80 yuan.

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吕彪,许耀照,赵芸晨.河西走廊内陆盐渍土生物修复与调控研究[J].水土保持通报,2008,(3):198-200

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  • 收稿日期:2007-08-29
  • 最后修改日期:2007-11-19
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  • 在线发布日期: 2014-11-26
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