留茬覆盖免耕条件下土壤休闲期节水效应研究  

Study on Saving Water Effects of No-tillage with Straw Mulch During Summer and Winter Fallow

作　　者：姚宝林[1] 景明[2] 施炯林[3] 

机构地区：[1]塔里木大学农业工程学院,新疆阿拉尔843300 [2]黄河水利科学院引黄灌溉技术研究中心,河南新乡453003 [3]甘肃农业大学工学院,甘肃兰州730070

出　　处：《西北农业学报》2008年第2期122-125,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA2Z4191);甘肃省省长基金项目(RS015-A41-006)

摘　　要：在河西内陆河灌区将储水灌溉和留茬覆盖免耕技术相结合,经2003-2004年度和2004-2005年度的试验研究表明：留茬覆盖免耕在夏季休闲期比常规耕作和秸秆还田土壤分别多贮水18.09 mm、13.54 mm和12.06 mm、17.06 mm;冬季休闲期具有明显的抑蒸保墒效应,抑制蒸发率随储水定额的增加出现先增后减的变化趋势,在储水定额为975 m^3·hm^-2时达到最大,分别为38.1%和33.4%,在储水定额为2100 m^3·hm^-2时减少到7.3%和6.6%,结合播前土壤水分,初步确定储水定额为975 m^3·hm^-2时为宜。Winter storage irrigation connected no-tillage with straw mulch （NTS） experiments in Hexi inland river irrigation region in 2003-2004 and 2004-2005 showed that NTS increased the soil water contents 18.09 mm,13.54 mm and 12.06 mm,17.06 mm than conventional tillage with bare ground （CTB） and conventional tillage with straw（CTS） on summer fallow respectively; NTS could reduce soil evaporation effectively on winter fallow, The inhibition evaporation ratio of NTS changed from 38.1% , 33.4% to 7.3% ,6.6% at 975m^3·hm^-2 and 2 100 m^3·hm^-2 winter storage irrigation （WSI）quotas respectively. Pre-sowing soil water contents showed that 975 m^3·hm^-2 was the best winter storage irrigation quotas in Hexi irrigation region.

关 键 词：留茬覆盖免耕 休闲期 储水灌溉 

分 类 号：S152.7[农业科学—土壤学]