Study Of Flora On Choripetalous Weeds In Urban And Rural Of Southern Junggar Basin

The southern area of the Junggar Basin is the core area of northern Xinjiang's agricultural economic development.The reclamation areas and other production have been expanding.Various industries such as agriculture,forestry,animal husbandry and fishery have become increasingly close to domestic and foreign exchanges,resulting in traditional weeds.Before we have time to fully understand and manage,the expansion of reclamation areas and other production and living areas has caused some indigenous plants in desert oasis areas to frequently appear in human life concentrated areas,and the continuous introduction and naturalization of foreign weeds have made the southern Junggar Basin.The control of weeds in agricultural areas is obviously inadequate.From the autumn of 2017 to the summer of 2020,the team conducted a comprehensive and systematic field investigation on the weeds in the urban,rural and agricultural areas of the southern Junggar Basin,and clarified the species and the types of weeds in the agricultural areas in the southern Junggar Basin.Specific geographical distribution,analysis of its flora composition and species diversity characteristics,in the form of specimens and color pictures,for the identification and control of weeds in agriculture,forestry,animal husbandry,fishery,for plant entry and exit inspection and quarantine,agricultural products processing and Trade,urban and rural greening and environmental protection,ecological security and ecological civilization construction provide useful services and technical support,and also provide a new theoretical basis for basic botany research on Xinjiang weeds.Research indicates:1.There are 24 families 95 genera and 202 families of stoloniferous weeds in the rural area of southern Junggar Basin,which there are 62 common weeds.There are no typical malignant weeds or invasive alien species in the spermatozoon weeds in the study area.Three new record genus of exotic weeds in Xinjiang were found in the study area,namely Cruciferae Orychophragmus Cruciferae,Euphorbiaceae Euphorbiaceae Acalypha and Lythraceae Lymanthaceae Ammannia;7 species of Xinjiang exotic The newly recorded species of weeds are Amaranthus hybridus,Amaranthus blitoides,Amaranthus viritos,Amaranthus viridis,Erysimum amurense,Orychophragmus violaceus,Acalypha australis,and Amaranthus amaranthus.2.From the perspective of the number-level quantitative structure of families,there are a total of 19 families of single-family and oligo-family of weeds in this area,accounting for the highest proportion(79.16%),but the number of genera is small.They constitute the main body of the genus-level quantitative structure in this area.They are Leguminosae,Leguminosae,Chenopodiaceae,Caryophyllaceae,Caryophyllaceae,Umbelliferae and Cruciferae.From the perspective of the number-level quantitative structure of families,there are 20 families of single-family and oligocephaly in the area,including 72 species,accounting for 35.64 of the total species;Although there are only 4 families in the family,they contain 64.36% of the total species,which is the main body of the area.They are Chenopodiaceae(43),Cruciferae(37)and Leguminosae(33))And Polygonaceae Polygonaceae.Therefore,Chenopodiaceae(9/43),Cruciferae(23/37)and Leguminosae(14/33)of Leguminosae(14/33)are the dominant families of weeds in the area.3.From the perspective of the species-level quantitative structure within the genus,the degree of differentiation of the weed genera in this area is high,and 70% of the weed species contained in the small genus and single species can also be considered as weed plants in this area.The composition of the genus is based on a single genus,while the composition of the genus is based on the weed species contained in the small genus.Among them,there are many types of Polygonum(11),Salsola(11),Chenopodium(10),Suaeda(8),Lepidium(7),Amaranthus(7)),Rumex is Rumex(6).4.Life-type characteristics: There are 3 types,mainly one or two-year-old herbaceous plants,with 129 species,accounting for 63.86% of the total species;followed by perennial herbs,there are 65 species;semi-shrubs have 4 species.5.Ecological characteristics: There are 3 types,mainly mesophyte weeds,165 species,followed by moist weeds,32 species,and only 5 species of xerophytes.6.Geographical characteristics of the floristic elements: The geographical elements of the weed flora of the lobular flowers in the southern agricultural area of Junggar are relatively complex,with 9 types of distribution areas and 9 variants.Excluding the 22 genera distributed in the world,the number of genera contained in the Mediterranean Sea,West Asia to Central Asia and its variants and the distribution of the North temperate zone and its variants,and the number of genera contained in the Old World temperate zone and its variants are 22 genera,21 genera and15 genera,respectively,Accounting for 30.24%,28.75%,and 20.53% of the non-world distribution respectively;the pan-tropical distribution and its variants have 6 genera,accounting for 9.57% of the non-world distribution;the central Asian distribution and its variants have 5genera,accounting for 6.84 of the non-world distribution %;temperate Asian distribution,China to Himalaya distribution and China to Japan distribution have 1 genus.Among them,the three types of distribution in the northern temperate zone and its variants,the old world temperate zone and its variants,and the temperate zone in Asia are relatively typical types of temperate zone,with37 genera in total,accounting for 50.68% of the non-world distribution genera.The pan-tropical distribution and its variants and the distribution and variants of Central Asia are slightly infiltrated.7.Based on whether the weeds are widely distributed in various regions in the region,the202 species of weeds are divided into wide-area(common)weeds and narrow-area weeds,with 62 species and 140 species respectively.8.There are no quarantine weeds and malignant weeds that cause serious problems to all walks of life in the weedy weeds in this area.26 harmful weeds were further screened,and theremaining 176 weeds had little or no harm People are safe.In addition,among the 7 newly discovered newly distributed species in Xinjiang,Erysimum amurense,Orychophragmus violaceus,Amaranthus viridis and Amaranthus hybridus have not been temporarily harmed in the area;Acalypha astralis low-hazard weed;Amaranthus blitoides are moderately harmful weeds;Amaranthus longifolia Ammannia coccinea is a highly harmful weed.Relevant departments should pay attention to its tracking and monitoring and take effective measures to control it.