沙枣（Elaeagnus angustifolia L．）在黄河三角洲盐碱地的应用前景

THE APPLICATION PROSPECT OF ELAEAGNUS ANGUSTIFOLIA L. IN SALINE SOIL ON THE YELLOW RIVER DELTA

黄河三角洲是我国三大三角洲之一，总面积达5．4×105 hm2，其中盐碱地面积达70％以上，并且仍在以每年1．3×105 hm2的速度增加．黄河三角洲地区土地盐碱化程度高，夏季降雨集中，春秋季较干旱，这些不利的环境因素导致该地区生态环境比较脆弱，绿化造林难度大，植被覆盖面积小，当地的景观生态系统比较单一．因此，筛选优质抗盐碱树种并建立一套完整的绿化栽培体系，以提高黄河三角洲地区的绿化面积是现在所面临的严峻问题．沙枣由于抗旱耐盐碱成为改良黄河三角洲地区的绿化树种，本文综述了沙枣作为黄河三角洲地区盐碱地绿化树种的应用前景．

The Yellow River Delta is one of the three delta in China,with a total area of 5.4 ×105 hectaresand the area of saline soil is more than 70%,what’s more,the saline soil area is still increasing at 1.3 ×105hectares per year.On the Yellow River Delta,the saline soil contains high salt,rain heavily in summer and it isdrought in spring and autumn,all that lead to fragile ecological environment,difficult afforestation and greeningand smaller area with vegetation cover,so that the local landscape ecosystem is relatively simple.Thus,it isimportant for us to collect highquality and saltresistance trees and establish a complete set of greening cultivationsystem.By this way,we can improve the greening area and landscape of the Yellow River Delta.Elaeagnusangustifolia is becoming greening trees because its tolerance to drought and salt.In this paper,the applicationprospect of Elaeagnus angustifolia as greening trees is reviewed.