【摘要】 在黑河流域的灰棕荒漠土上种植了耐旱牧草小冠花改土培肥效果明显,3年生小冠花与CK比较,0~20 cm土层中自然含水量增加73.93g kg-1、土壤贮水量增加67.17m3hm-2、>0.25mm团粒结构增加12.16%、总孔度增加10.94%、土壤容重降低0.29g cm-3;pH由8.15降到7.83,全盐含量降低1.72g kg-1,脱盐率达到58.70%;土壤有机质增加3.01g kg-1、速效N、P、K分别增加20.9 mg kg-1、5.7 mg kg-1、11.3 mg kg-1,CEC增加7.0 cmol kg-1。3年生小冠花平均株高85.4 cm,单株鲜重1074.2g,单株干重343.8g,鲜草产量72.5 t hm-2,干草产量23.2 t hm-2,产值0.93万元hm-2。更多还原

【Abstract】 Little crest grass,a kind of drought-ednuring herbage was planted on the brown desert soil in Hexi valley to improve the soil fertility.Compared with the CK treatment,the nature moisture content of the soil planted little crest grass for 3 years increased73.93g kg^-1,water storage content 67.17m³ hm^-2,>0.25mm granular structure 12.16%,total porosity 10.94%,while soil bulk density decreased 0.29g cm³,pH from 8.15 to 7.83,total salt content 1.72 g kg^-1.Soil organic matter,available N,P and K,and CEC increased 3.01 g kg^-1,20.9mg kg^-1,5.7mg kg^-1,11.3mg kg^-1 and 7.0 cmol kg^-1,respectively.The average height of little crest grass with 3 years old was 85.4cm,fresh weight 1074.2g,dry weight 343.8g,yield of fresh grass 72.58t hm^-2,yield of dry grass 23.2 t hm^-2,output 93 thousand yuan hm^-2.更多还原