Ecological Significance of Planting Suaeda salsa in Saline / Alkali Soils in the Lop Nur Potash Mine
LI Cong-juan;SUN Yong-qiang;FAN Jing-long;ZHAI Zhi-zhong;YANG Si-rui;FAN Jing-wei;WANG Ting-ting;WANG Shi-jie;ZHANG Heng;National Engineering Technology Research Center for Desert-Oasis Ecological Construction,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences;Key Laboratory of High Efficent Processing of Bamboo of Zhejiang Province,China National Bamboo Research Center;Xinjiang Agricultural University;Xinjiang Entry-exit Inspection and Quarantine Portal;
Lop Nur is one of the most serious salinization regions in the world. In this case,saline soil improvement and ecological restoration plays an important role in improving the ecological landscape,microclimate and living environment for Lop Nur Potash mine. This study was conducted in the Lop Nur potash mining artificial vegetation ecological demonstration area,the planted Suaeda salsa was selected to study the different soil types effects on plant growth and whole replacement soil than other soil types,and relatively grew slowly in the slag zone,indicating that good soil environment is conducive to the growth of plants; for slag zone,although the salt content was not the highest,the large porosity make it have a poor water retention capacity,and therefore,plants in this zone grew not well. In the original soil zone,although the germination and survival rate was lower,the survival individual grew well,which indicating that once Suaeda salsa adapted to saline soil environment,high salinity will not influence its growth. The root shoot ratio results showed that the original soil zone slag zone slag + replacement soil zone whole replace soil zone,indicating that the plants had to develop a more powerful roots to get more nutrients and water to survive better in the poor soil environment( high salt / high porosity),such phenomenon is a kind of ecological mechanisms of plant adaptation to stress environment. The results of soil chemical properties after Suaeda salsa have been planted showed that: soil organic carbon content,total nitrogen,total phosphorus and total potassium content increased with the growing year. while,it reduced the salt content and p H in the original soil area,indicating that Suaeda salsa plays an important role in reducing the soil salts and accumulation of soil nutrients in alkali-saline soil area.
【Fund】： 新疆维吾尔自治区科技支撑项目(201433101);; 中国科学院西部博士专项(XBBS201205);; 国家自然科学基金(31300449)
【CateGory Index】： S156.4
【CateGory Index】： S156.4