人工种植红豆草对灰棕荒漠土改土效应的研究  

Effect of planting sainfoin on the improvement of gray-brown desert soil

作　　者：肖占文[1] 张俐[1] 刘金荣[2] 

机构地区：[1]河西学院农学系,甘肃张掖734000 [2]河西学院生物系,甘肃张掖734000

出　　处：《干旱地区农业研究》2011年第3期199-202,共4页Agricultural Research in the Arid Areas

基　　金：甘肃省科技支甘项目(2010-006)

摘　　要：在甘肃河西走廊的灰棕荒漠土上,进行了人工种植红豆草对灰棕荒漠土改土效应的研究,结果表明：3年生红豆草鲜草产量64.50 t/hm2,折干草22.57 t/hm2,产值为1.47万元/hm2;与CK比较,0～20 cm耕层田间持水量、团聚体、总孔隙度分别增加12.05%、18.33%和15.47%,容重、pH分别降低0.41 g/cm3和0.70,全盐由5.15g/kg降低到2.19g/kg,脱盐率达到57.48%;有机质,速效N、P、K亦随之增加.In gray-brown desert soil in Hexi Corridor of Gansu,a study was carried out on the effect of planting sainfoin on the improvement of gray-brown desert soil.The results showed that the fresh grass yield of 3-year-old sainfoin was 64.50 t/hm2,equalling hay 22.57 t/hm2,and the output value was 14,700 yuan/hm2;compared with CK,0～20 cm topsoil field capacity,aggregates,total porosity increased by 12.05%,18.33% and 15.47%,while the bulk density and pH decreased by 0.41 g/cm3 and 0.70,respectively;the total salt reduced from 5.15 g/kg to 2.19 g/kg,with a desalination rate of 57.48%;and organic matter and available NPK also increased.

关 键 词：灰棕荒漠土 红豆草 改土培肥 经济效益 

分 类 号：S156.93[农业科学—土壤学]