不同灌溉方式对柳枝稷生长及光合特性的影响  

Effects of different irrigation methods on the growth and photosynthetic characteristics of switch grass

作　　者：珊丹[1] 陈杨 荣浩[1] 田秀民[1] SHAN Dan;CHEN Yang;RONG Hao;TIAN Xiumin(Institute of Water Resources for Pastoral Area,Ministry of Water Resources of China,Hohhot 010020,Inner Mongolia;Datang International High Alumina Coal R&D Center,Ordos 010010,Inner Mongolia)

机构地区：[1]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [2]大唐国际高铝煤炭资源开发利用研发中心,内蒙古鄂尔多斯010010

出　　处：《江苏水利》2019年第6期41-45,共5页Jiangsu Water Resources

基　　金：大唐国际高铝煤炭研发中心科技项目;中国水利水电科学研究院基本科研业务费专项(MK2017J04)

摘　　要：柳枝稷作为一种优良的纤维素类草本能源植物,被认为是一种理想的可再生替代能源之一,同时又具有优良的牧草特性及水土保持功能。研究2种滴灌方式对柳枝稷生长及光合特性的影响,可为其在我国西部地区大面积种植提供依据。研究结果表明,地上滴灌、地下滴灌10~20cm土层土壤含水量平均值为18.84%、12.41%,灌水量相同时,采用地上滴灌10~20cm土壤含水量要高于地下滴灌。地上滴灌处理下柳枝稷生长发育要显著高于地下滴灌处理。在生育期内,地上滴灌处理下的柳枝稷叶片净光合速率、蒸腾速率和水分利用效率均高于地下滴灌处理,在柳枝稷生长期内,开花期的植物耗水量最大。Switch grass, as an excellent cellulosic herbaceous energy plant, is considered as one of the ideal renewable alternative energy sources, as well as excellent forage characteristics and soil and water conservation functions. The effects of two kinds of drip irrigation methods on the growth and photosynthetic characteristics of switch grass were studied, which could provide a basis for large-scale planting in western China. The results showed that the average soil water content of the ground layer drip irrigation and subsurface drip irrigation was 18.84% and 12.41%. The soil water content of 10 to 20cm on the ground is higher than that of underground drip irrigation in the same amount of water. The growth of switch grass under drip irrigation on the ground was significantly higher than that of underground drip irrigation. During the breeding period, the net photosynthetic rate, transpiration rate and water use efficiency of the switch grass under drip irrigation on the ground were higher than those of underground drip irrigation. In the long period of willow grass, the flowering plants consume the largest amount of water.

关 键 词：滴灌 土壤含水量 净光合速率 水分利用效率 

分 类 号：S157.2[农业科学—土壤学]