微灌技术对环湖区退化人工草地的影响  

Micro Irrigation Technology Affecting Degraded Artificial Grassland in the Area Around Qinghai Lake

作　　者：张金旭 李润杰 

机构地区：[1]青海省水利水电科学研究所,西宁810001

出　　处：《中国农学通报》2016年第29期120-123,共4页Chinese Agricultural Science Bulletin

基　　金：2016年度青海省创新平台建设专项"青海省水资源高效利用工程技术研究中心"(2016-GX-G06)

摘　　要：旨在采用微灌技术对环湖区混播人工草地进行节水灌溉试验的观测研究,探索环湖区人工草地对灌溉条件响应,为环湖区混播人工草地管理和持续高效利用提供参考依据。采用光伏扬水系统进行微喷灌节水灌溉试验,调查群落结构,计算地上和地下植物量。研究表明:植物群落多样性、均匀度、生态优势度指数均为灌溉区大于对照区;水分充足条件下能促进植物茎叶的生长,而干旱有利其根部的发育;灌溉可有效提高环湖区人工草地的优良牧草产量。可见水分的增加抑制了退化草地指标种生长,有利于草地恢复,环湖区人工草地对灌溉条件具有较好响应。The purpose of this study is to explore the response of artificial pasture to irrigation conditions inQinghai Lake region and provide reference for its management and sustainable utilization. Photovoltaicpumping system with micro sprinkler was adopted to conduct micro irrigation experiment in mixed sownpasture around Qinghai Lake. Then community structure was investigated, above and under-ground grasslandbiomass was calculated. Results showed that diversity index, evenness index and ecological dominance indexof plant community in the control area were smaller than that of irrigated area. Irrigation promoted the growth ofplant leaf, while drought was in favor of the root development. Irrigation effectively improved forage productionin artificial pasture. Therefore, the increase of soil moisture could inhibit the growth of indicator species indegraded pasture, benefit grassland restoration, and the artificial pasture around the lake could response wellto irrigation.

关 键 词：环青海湖区 退化草地 群落结构 均匀度指数 生态优势度指数 

分 类 号：S275.5[农业科学—农业水土工程]