不同水分梯度对阿拉善盟地区4种沙生植物幼苗生长的影响  

Effects of Different Water Gradients on Seedling Growth of Four Species of Desert Plants for Alxa League

作　　者：谢菲 席海洋[2] 张斌武 桂翔 杨阳 刘俊良 XIE Fei;XI Hai-yang;ZHANG Bin-wu(Alxa League Forset Seedling Station,Alxa,Inner Mongolia 750300;Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Aacademy of Sciences,Lanzhou,Gansu 730000)

机构地区：[1]内蒙古阿拉善盟林木种苗站,内蒙古阿拉善750300 [2]中国科学院寒区与旱区环境工程研究所,甘肃兰州730000

出　　处：《安徽农业科学》2018年第32期96-98,共3页Journal of Anhui Agricultural Sciences

基　　金：阿拉善沙产业研究院科技计划项目"沙生植物良种选育及繁殖技术研究"

摘　　要：[目的]比较4种沙生植物幼苗最适生长水分梯度,总结4种阿拉善盟地区乡土树种幼苗苗期管理方式。[方法]选择黑果枸杞、沙拐枣、花棒、梭梭4种具有代表性的阿拉善地区乡土沙生植物1年生幼苗,通过生长期不同水分梯度的田间试验研究,分析不同水分梯度下各试验小区生长季土壤含水量,生长季末幼苗植株存活率、株高、地径及新梢长度等生长指标。[结果]黑果枸杞苗期管理的适宜水分梯度为生长季每隔20 d灌溉1次,连续灌溉5次,每次灌水量为870 m^2/hm^2;沙拐枣、花棒、梭梭苗期管理的适宜水分梯度为生长季每隔20 d灌溉1次,连续灌溉4次,每次灌水量为870 m^3/hm^2。[结论]该研究为建立行之有效的适用于乡土树种的灌水方式提供了依据。[Objective]To compare the optimum water gradient for seedlings growth of four species of desert plants,to summarize the seedling management methods for those native tree species in Alxa League.[Method]Four representative annual seedlings of native desert plants in Alxa League were selected from the field such as Lycium ruthenicum Murr.,Calligonum arborescens Litv.,Hedysarum scoparium,Haloxylon ammodendron.Field trials with different water gradients during growth period were conducted.The soil moisture content in the growing season,the survival rate of planting seedlings at the end of the growing season,the growth indexes such as plant height,ground diameter and new growth length were measured.[Result]The suitable water gradient for the seedling management of L.ruthenicum was irrigated once every 20 days in the growing season,and continuously irrigated five times,the amount of water was 870 m 2/hm 2 each time.The seedling management of C.arborescens,H.scoparium,H.ammodendron was irrigated once every 20 days in the growing season,and continuously irrigated four times,with an irrigation volume of 870 m 2/hm 2 each time.[Conclusion]This study provided basis for establishing effective irrigation methods suitable for native tree species.

关 键 词：沙生植物 水分梯度 土壤含水量 存活率 生长量 

分 类 号：S718.45[农业科学—林学]