| The investigation and research of species composition of garden trees,analysis of families and genera,analysis of the new garden trees,ornamental characteristics(viewing flowers,fruit observation,foliage and outlook)and diversity of garden woody plantswere carried out in Zhengzhou city.And using the way of typical combined random sampling,selected 28 green different types of green space as the main research object,To understand applicationsituation that the garden woody plantsresources and so on in Zhengzhou city,and 82 sample were selected to record garden woody plantscommunity,basing on community theory,statistical analysis of plant community characteristics,applied frequency,species important value,speciesrichness index,diversity index,evenness index,and other the status of the citygreenbelt plant community.According to the investigation and statistics,summarizes the application of garden woody plants in Zhengzhou city.At the end,summing up the characteristics and shortcomings,and put forward the corresponding suggestions according to the existing problem.The investigation and the analysis results are as follows:1:Analysis of species diversity and ornamental characteristics of garden woody plants in Zhengzhou city.(1)There were 91 families,273 genera,684 species 7 subspecies,58 cultivated varieties,80 varieties and 42 forms of garden woody plants in Zhengzhou city.Among them,there were 8 families,23 genera,46 species,19 cultivated varieties,5 varieties and 2 forms of Gymnospermae and 83 families,250 genera,638 species,7 subspecies,39 cultivated varieties,75 varieties and 40 forms of Angiospermae.Among Angiospermae,there were 81 families,239 genera,607 species,7 subspecies,37 cultivated varieties,69 varieties and 38 forms of Magnoliopsida and 2 families,11 genera,31 species,2 cultivated varieties,6 varieties and 2 forms of Liliopsida.(2)The statistical classification according to the of plants species source,there were 68 families,216 genera,385 species of local Zhengzhou native plants.and there were 486 alien species.Among them there were 78 families,193 genera,393 speciesdomestic introduced cultivation.and there were 34 families,59 genera,93 species foreign introduced cultivation.Among foreign introduced cultivation,there were 12 families,17 genera,19 species naturalized plants.Also there were 21 families,26 genera,33 species endemic to China.(3)Analysis of families and genera of garden woody plants in Zhengzhou.there were 91 familiesthat the number of families(48 families)in the middle section of the 2~9 species was the most,accounting for 53.93% in all kinds of families garden trees,Contains more than 20 large families containing species(464 species)wast the most,accounting for 53.27% in all kinds of species garden trees.The most species of Rosaceae in the statistical garden woody plants species that there were 21 genera,148 species.There were 273 generathatbelong to the medium containing 5~9 species(262 species)was the most,accounting for 30.08% in all kinds of species garden trees.The number of single genera(127 genera)was the most,accounting for 45.52% in all kinds of genera garden trees.(4)There were 60 families,131 genera,189 species,21 varieties and 12 forms of were not redorded in Flora of Zhengzhou(2008).(5)There were 411 kinds of trees species,383 kinds of shrubs species,37 kinds of vines species,40 kinds of bamboos species of garden trees.Among them,there were 184 kinds of evergreen garden trees,and 647 kinds of deciduous garden trees.Also there were 104 kinds of trees species,74 kinds of shrubs species,9 kinds of vines species,35 kinds of bamboos species of new records of garden trees.Among of new records of garden woody plants that there were 91 kinds of new records evergreen garden trees,including 23 species of trees,30 species of shrubs,3 species of vines and 35 species of bamboo.and there were125 kinds of new records deciduous garden trees,including 81 species of trees,44 species of shrubs,6 species of vines.(6)Analysis of according to the plants ornamental characteristics,there were 558 kinds of view flowers and plants species(200 genera belong to 92 families)in Zhengzhou city,369 species of fruit trees(155 genera belong to 90 families),192 species of foliage trees(71genera belong to 40 families),24 species of viewtrees(15 genera belong to 12 families).The floweringgarden woody plants in Zhengzhou mainly focus on the period from March to August.The white,red,and yellow plants are the most.The fruit trees are mainly seen from June to November.The red fruit treeswere the most,andberry,pear fruit and stone fruit dominate,there are 112 species of foliage trees in the foliage,which occupy the largest number of foliage plants in Zhengzhou city.2:The investigation and statistics of garden woody plants communities in Zhengzhou city show that:(1)Zhengzhou city the garden woody plants Patrick index S ranged from 4 to 19,the highest value of 19 is only one community.The plots of the Henan Agricultural University belong to the university campus.The Patrick S index higher(S≥10)have 30 community,accounting for 36.58%.The Patrick S index in 7~9 plants communities that the totai of 38 communities,accounting for 46.34% of the total community.(2)In the green land of the garden community in Zhengzhou city,Shannon-Wiener index(H ?)to park green tree layer to the maximum value,up to 3.663,while the square green shrub layer was the least,only 2.384.In the different types of green land,the Shannon-Wiener index(H ?)was the greatest in the tree layer.From the diversity Simpson index(D),the species diversity of all types of tree layers and shrub layers is very close,but the D value of the tree layer of the park green is the largest,up to 0.967,and the D value of the tree layer of the square green space is the smallest,only 0.898.(3)From the change trends of the Pielou evenness indexJsw and Jsi in the garden green space of Zhengzhou city,it would be found that there was no significant difference in the uniformity of the green land types,but overall the tree layer uniformity is greater than the shrub layer uniformity. |
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