新疆荒漠地区C4植物的生态分布与区系分析

以前人工作为基础，对照已发表的C3/C4植物一览表，及近年国内外陆续发表的资料，综合整理出新疆荒漠地区已知的C4植物名录，共有14科63属的279种植物，同时归纳分析了279种C4。植物的分类地位、生活型、地理成分以及区系特点等方面。研究结果表明：藜科最多，其次是禾本科、莎草科、百合科和蓼科等等。所以该区的C4类型中被...

Geographic distribution and ecology of C4 plants in Xinjiang

All the C4 plants in the arid area of Xinjiang were identified according to the stable carbon isotope ratios contents and some related 1iteratures.There are 278 species of C4 plants from 66 genuses in 12 families.The taxonomy,life form,geographical element and the areal-types of genera were accordingly analysis.The results showed that the families with most species orderly from Chenopodiaceae,Gramineae,Cyperaceae,Liliaceae,Polygonaceae etc.Among which,the dicotyledon more than monocotyledon of angiosperm,there is not C4 plants in the pteridophyte and the gymnosperm.Annual and perennial of C4 plant dominate in the arid area of Xinjiang.This reveals these species compete with a better-adapted and more powerful succession evolution.The dominant of C4 plants species occupy accounts for 10%.Among C4 plants 125 species grow in sand dune,103 species grow in salt and alkaloid environment,56 species grow in wet environment.Everything prove C4 plant might have higher tolerance to environmental stresses(dry and salting)and could make greater contribution to sand land restoration of botanic characters.Furthermore,The floristic composition of C4 plants is concisely enumerated and were found to belong to 10 categories,which the dominant element of the geographical composition was Mediterranea,W.Asia to C.Asia and there are 13 genera and 60 species in this region.The distribution of the florae reflects the dynamic climatic and geological changes during the species succession on a historical scale.Therefore,it is suggested to carry out the study on breeding,introduction and popularization of C4 plants and so as to solve desertification in the arid regions in northwest China.The complete investigation of the plant resources and their distribution and succession in the region will provide the scientific basis for protecting the plant resources in the region.