50Mmol/L NaCl stress had no influence on level of ATP in root of Ginkgo andAilanthus.Level of ATP in roots of Ginkgo,Ailanthus and Robinia decreased greatly under200mmol/L NaCl stress.The extent of decrease of ATP level accord to plant salt tolerance:Ginkgo is more salt tolerance,and ATP decreases more slowly than that of Ailanthus andRobinia.

11.50mmol/L的NaCl脅迫沒有引起銀杏和臭椿根尖ATP水平的明顯改變；200mmol/L的NaCl脅迫引起銀杏国产熟女高精品裸交视频、刺槐和臭椿ATP水平指數(shù)性的衰減在线看片无码永久免费A，ATP的下降幅度的變化與植物耐鹽性一致：耐鹽性強的銀杏，ATP的下降幅度明顯比刺槐和臭椿小欧美激情1级片。

Ginkgo is more drought tolerant,and maintain relatively higher Pn under drought;Robinia pseudoacacia is less drought tolerant,and Pn decrease greatly under stress;Ailanthus altissima is placed in the middle.

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At one time, we emphasized the solar radiation transfer mechanics. To advance the estimation precision, in this paper, we classed land cover into four layer, canopy of Robinia pseudoacacia L ,top of Melilotus albus Desr,bottome of Melilotus albus Desr and layer of soil, separately estimated their fluxes of moisture, heat and CO2 ,actualized the separated simulation for each composement in soil-vegetation-atmosphere contimuum.

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At last,We carry out stability asssessment about the vegetation in virtue of the model builded in this plot.We calculate the vegetation's ecological water requirement on May 2004: canopy of Robinia pseudoacacia L require 5.2mm, Top of Melilotus albus Desr require 32.2mm, Bottome of Melilotus albus Desr require 8.6mm, Layer of soil require 17.6mm, totalize 63.6mm,Which more 22.33 mm than the contemporaneous rainfull 41.27mm.

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The Parthenolecanium corni Bouche has the certain degree difference between two kind of host plants population(Fraxinus chinensis Raxb, Robinia pseudoacacia Linn ). This kind of difference and biology habit and host plant related.

可能是由于寄主營養(yǎng)條件及寄主內(nèi)部不同結(jié)構(gòu)所形成的小環(huán)境差異對扁平球堅蚧不同種群間遺傳變異起到了重要作用欧洲熟妇色XXXX欧美在线观看。

Under different irrigation methods, such as small-pipe-flow irrigation and flooding irrigation, a study was conducted on Robinia pseudocacia L.

在小管出流與大水漫灌不同灌溉方式下欧美国产综合，研究刺槐Robinia pseudocaciaL。

There were only 94 vascular plant species, belonging to 50 family and 75 genera. The dominant species in the communities were deciduous broadleaf species Liquidambar formosana, Robinia pseudoacacia, Ailanthus altissima, Acer buergerianum, and Celtis sinensis, evergreen broadleaf species Cinnamomum camphora and Elaeocarpus glabripetalus, and Phyllostachys heterocycla. Robinia pseudoacacia+Cinnamomum camphora community had the highest Shannon-Wiener index (1757) and Phyllostachys heterocycla+Acer buergerianum community had the highest Simpson index (0163), but no consistency was observed between the curves of H and D. For vertical structure, most communities had no significant understory stratification.

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In chapter 4, the restoration and rehabilitation technology of multiple functional forest system were studied. Firstly, it was expounded that we should restore and rehabilitate watershed protection forest in source of rivers, in catchment areas of small watersheds and around reservoirs, which includes protecting the present natural forests and planting watershed protection forests in the non-forest land. The main afforestation models comprises "Cupressus funebris + Alnus cremastogyne or Robinia pseudoacacia}","Pinus massoniana + Camellia oleifera (or Robinia pseudoacacia","Populus + Robinia pseudoacacia ", etc.

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In order to explain clearly the variation status of embryo from tetrapoid Robinia pseudoacacia and fully use the variation resource initiated in the sexual reproduction of TRP in the further improvement of TRP, the classification and vitalities of seed embryos from tetraploid Robinia pseudoacacia were studied. The main results are as follow. According to the cotyledon number, color and plumpness, the seed embryos of TRP could be divided into 5 types: YVT (yellow, very replete,2 cotyledons), YMT( yellow, more replete,3 cotyledons ), YRF ( yellow, replete,4 cotyledons ), GNT ( green, no-replete, 2 cotyledons ) and WNT ( white, no-replete, 2 cotyledons ).

為了闡明刺槐同源四倍體種子胚變異狀況及充分利用刺槐同源四倍體有性過程創(chuàng)造的變異資源對四倍體刺槐進行遺傳改良，研究了刺槐同源四倍體種子胚類型及其生活力特征日韩国产欧美，主要結(jié)論如下：刺槐同源四倍體種子胚按照子葉數(shù)量内地自拍、顏色及飽滿程度，可以劃分出5個類型：黃二222aaa男人的天堂免费网址、黃三v在线观看欧美精品、黃四欧美在线精品一区二区三区、綠二及白二特级无码毛免费视频，所有類型種子胚混合平均單胚重量接近二倍體的1/2。

The results indicate that:(1)Compare with the comparion, the soil physics character are improved after vegetation restortion , the soil unit weight in cyclobalanopsis glauca, Pinus elliottii, Robinia pseudoacacia , mixed forest and fire slash shrub separatly are 1.525g/cm~3, 1.426 g/cm~3, 1.625 g/cm~3, 1.482 g/cm~3, 1.423 g/cm~3. We can find the soil unit weight in other forest all bigger than the comparion (1.580 g/cm~3) except Robinia pseudoacacia .All these mean forest soil is looser and better capacity for aerated and dank.

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