Cupreous preparation and zincous preparation played a role in regulating root growth and development of Ginkgo *** chemical root control preparations of Cu 100 g·L-1,ZnCO3120,160 g·L-1,Zn（AC）2 120,160 g...
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Cupreous preparation and zincous preparation played a role in regulating root growth and development of Ginkgo *** chemical root control preparations of Cu 100 g·L-1,ZnCO3120,160 g·L-1,Zn（AC）2 120,160 g·L-1 and DK 1 g·L-1 were able to inhibit the length of first classical latteral root,thereby they controled root *** first classical lateral roots treated with cupreous preparation and diquat preparation were shorter than that treated with zincious preparation,however the later produced seedlings with better *** length of first classical lateral root,the number of out-side roots with the diameter under 1 mm,and the number of root tips as diameter under 1 mm had linear correlations between them,thus the number of out-side roots could be a better index than the length of first classical lateral root for determining the effective of the root control.
Questionnaire survey was taken,the plant-caused pollution in 4 typical cities including Beijing,Hefei,Chengdu and Guangzhou was *** of three kinds of plant-caused pollution such as pollen,flying hair and catkin,and sm...
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Questionnaire survey was taken,the plant-caused pollution in 4 typical cities including Beijing,Hefei,Chengdu and Guangzhou was *** of three kinds of plant-caused pollution such as pollen,flying hair and catkin,and smell between different cities and different people were *** results are as follows:the plant-caused pollution has obviously regional distribution *** rate of plant-caused pollution is 5.72% in Beijing,0.59% in Chengdu,2.12% in Hefei and 2.11% in *** order of the number of three kinds of plant-caused pollution allergen is pollen>flying hair and catkin>*** allergen caused by pollen and flying hair and catkin gathers largely in March to *** allergen caused by smell gathers largely in *** whole condition of the allergen is female>male,and most of them are 20 to 50 years *** results provide basis for the further research,and are also helpful for prevention of plant-caused pollution in urban area.
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