共和沙珠玉沙区沙障植物筛选研究

Study on Screening of Sand Barrier Plants in Shazhuyu Sandy Area of Gonghe Basin

荒漠化沙区造林工程中,沙障植物的选择是影响造林效果的因素之一。本研究选择7种乔灌木和6种草本植物在共和沙珠玉沙区进行种植试验。结果显示,沙地云杉、青海云杉、乌柳、柽柳、沙地柏、沙棘等植物在沙珠玉沙区成活率高,对沙区生境适应性较强,适宜作为沙珠玉沙区防风固沙植物;菊芋、沙蒿、披碱草在播种一年后,生物量大,根系深,适应性强,是优良的固沙植物。此外,本文通过不同沙障模式试验,发现高立式网笼沙障+沙地柏植物沙障+沙棘(或柠条)植物沙障模式下,苗木成活率高,对沙区生境适应性较高,是适合沙珠玉沙区防风固沙的新模式。

In the afforestation project in desertified sandy areas,the selection of sand barrier plants is one of the factors affecting the afforestation effect.In this study,7 species of trees and shrubs and 6 species of herbaceous plants were selected for planting experiment in Shazhuyu sandy area of gonghe basin.The results showed that the survival rate of picea mongolica,picea crassifolia,black willow,tamarix chinensis,sabina vulgaris and Sea-buckthorn was higher,and they were suitable to be used as wind prevention and sand fixation plants in shazhuyu sandy area.jerusalem artichoke,Artemisia desterorum Spreng and Elymus dahuricus were excellent sand fixation plants with large biomass,deep root system,fast depression and strong adaptability.In addition,through the experiments of different sand barrier models,it was found that the model of polyethylene material high net cage sand barrier+Sabina vulgaris plant sand barrier+seabuckthorn(or Caragana)plant sand barrier had high survival rate of seedlings and high adaptability to the habitat of sandy areas,which was a new mode suitable for wind protection and sand fixation in shazhuyu sandy area.