摘要
纵穿古尔班通古特沙漠,调查测度了草地植被格局参数和微地形,分析了土壤理化性质。利用CCA排序和其它数理统计方法,讨论了沙漠地形和土壤理化性质等生境影响下的沙漠植物群落结构空间变化:沙漠北部草本植物物种丰富、盖度较高,多见沙生针茅、驼绒藜、齿稃草和短叶假木贼;沙漠中-南部主要生长沙漠绢蒿、沙蒿、白茎绢蒿、尖喙=牛儿苗、东方旱麦草、梭梭和琵琶柴等,并且以乔灌木物种多样性较高为特征。白梭梭、白皮沙拐枣、蛇麻黄、沙苔草、线叶庭荠、角果藜等基本为该沙漠草地的广布成分。在此基础上对比了不同地段各植物群落中相关种的营养物质组成和适口性,发现北部草原化荒漠草地发育优质牧草,具有良好的饲用价值;中-南部荒漠草地牧草在适口性、营养性和综合等级上略逊于北部,但因其在冬季里的不可替代性而具有重要饲用价值。
The paper reports the results of investigation and analyses to vegetation patterns, micro-terrain and soil physical-chemical properties in Gurbantunggut Desert. Vegetation and soil data were collected along north-south transects in the area 44°14′04″-45°41′52″N and 87°37′09″- 88°24′04″E. With Canonical Correspondence Analysis （CCA） ordination and other statistics methods, the paper discussed the spatial variations of the plant community structures, affected by habitats of terrain and soil physical-chemical properties, in the desert. In the north of the desert, the species of herbaceous plants are richer and their covers are higher, and Stipa glareosa, Ceratoides lateens, Schismus arabicus, and Anabasis brevifolia are developed. In the mid-south of the desert, Salsola collina, Artemisia arenaria , Seriphidium terrae-albae , Erodium oxyrrhynchum , Eremopyrum orientale , Haloxylon ammoden- dron and Reaumuria soongorica are characteristic with diverse species of trees and shrubs. Haloxylon persicum, CaUigonum leucocladum, Ephedra distachya, Carex physodes, Alyssum linifolium and Ceratocarpus arenarius are generally widespread species in the desert steppe. Based on the above results, the paper compared the nutrition composition and palatability of the correlative species in every plant community of different regional sections and found that the good grazing plants are developed on the northern steppification desert grassland of the desert and have good feeding values. The integrated level of palatability and nutrition for the grazing plants in the mid-southern desert grassland of the desert is slightly lower than that in the north, and then an un-substitutive action in winter makes them have important value for grazing forage.
出处
《干旱区地理》
CSCD
北大核心
2008年第6期855-861,共7页
Arid Land Geography
基金
新疆阜康市林业局项目
GEF新疆草地项目共同资助
