干旱胁迫对河西走廊边缘绿洲甜高粱产量、品质和水分利用效率的影响  

Effect of drought stress on yield,quality and water use efficiency of sweet sorghum in marginal oasis of Hexi Corridor

作　　者：解婷婷[1] 苏培玺[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站植物逆境生理生态与生物技术实验室,兰州730000

出　　处：《中国生态农业学报》2011年第2期300-304,共5页Chinese Journal of Eco-Agriculture

基　　金：国家自然科学基金项目(31070359);中国科学院西部行动计划项目(KZCX2-XB2-09-03)资助

摘　　要：为研究能源作物甜高粱在干旱区不同土壤水分条件下的生产力和水分利用状况,在甘肃河西走廊边缘绿洲区,对3种土壤水分(正常水分、中度干旱和重度干旱)条件下甜高粱产量、品质和水分利用效率进行分析。结果表明:中度干旱胁迫下甜高粱茎秆和整个地上部生物产量最高,其鲜重分别为77.3 t·hm-2和101.1 t·hm-2,干重分别为27.6 t·hm-2和34.9 t·hm-2。3种土壤水分条件下茎秆汁液锤度分别为21.9%(正常水分)、22.1%(中度干旱)和22.4%(重度干旱),但差异不显著。中度干旱胁迫下甜高粱的水分利用效率最高,为4.72 kg·m-3。说明适度的土壤水分亏缺,不仅有利于甜高粱生产力和品质的提高,而且更有利于节约水资源。To understand the productivity and water use status of sweet sorghum,the yield and quality of biomass and water use efficiency of the crop under different soil water conditions（normal water,moderate drought and severe drought） in marginal oasis in Hexi Corridor region,Gansu Province were analyzed.Based on the results,the maximum stem and aboveground biomass yield occurred in moderate drought stress condition,with fresh weights of 77.3 t·hm-2 and 101.1 t·hm-2,and dry weights of 27.6 t·hm-2 and 34.9 t·hm-2,respectively.Stem juice brix was 21.9%（normal water）,22.1%（moderate drought） and 22.4%（severe drought）,with no significant difference among the treatments.A maximum water use efficiency of 4.72 kg·m-3 was noted for the moderate drought stress treatment.This showed that not only sweet sorghum productivity and quality was higher,but also the valuable/scarce water resources of the region was saved under moderate drought stress.

关 键 词：甜高粱 河西走廊 边缘绿洲 干旱胁迫 生物产量 茎秆汁液锤度 水分利用效率 

分 类 号：S514[农业科学—作物学]