Characteristics of weed flora and diversity in urban-rural areas of Altay in Xinjiang
To understand the occurrence of urban-rural weeds in Altay area of Xinjiang,a systematic study was conducted on the types,geographical distribution,faunal composition,and diversity characteristics of weeds in this area by field investigation,morphological classification and identification,and reference to some literatures.The results show that:(1)There are 274 weed species across 154 genera and 37 families in urban-rural areas in this area.The dominant families are Gramineae(51 species),Compositae(42 spe-cies),Chenopodiaceae(35 species),Leguminosae(28 species),Cruciferae(13 species)and Polygonaceae(13 species).In the composition of the genus,there are 103 genera and 103 species of single-species genera,and 46 genera and 133 species in a few-spe-cies genera(2～5 species).Both of them account for the highest proportion in the number of weed genera and species in this area(re-presenting 96.75%of genera and 86.13%of species).Additionally,multiple genera(6～9 species)of Leymus,Artemisia,Polygo-num,Chenopodium and Atriplex have obvious advantages.(2)The geographical composition of 154 genera of weeds in this area is cat-egorized into 9 distribution types and 11 variants,predominantly temperate elements(71 genera,138 species).(3)The weed life forms in this area primarily include perennial(144 species,52.55%)and annual/biennial herbs(121 species,44.16%),with fewer parasitic herbs and subshrubs.Mesophytic weeds dominate the habitat types(215 species,78.47%),with fewer hygrophyte and xero-phyte weeds.(4)Native weeds(269 species,98.18%)are predominant in the weed flora,alongside 5 exotic weeds with potential and 10 quarantine weeds recorded over the past 20 years.Relevant departments should focus on monitoring and controlling quarantine weeds(10 species),malignant weeds(30 species),and severely harmful weeds(19 species)while tracking their population dynamics.
万方数据
维普
