Nutrient Characteristics And Dynamic Change Of Chlorophyll Content On Chlorotic Cinnamomun Camphcra's Leaves

Cinnamomum camphora is given more and more attention as an important species of trees in urban construction,but also getting more and more serious chlorotic.In this paper,Chlorotic Cinnamomum camphora on the nutrient characteristics of the leaf and chlorophyll content were studied in order to find some orderlinesses which were useful for urban tree management.The soils under urban green-lands in Hefei were badly disturbed by human activities,particularly the pollution from architectural garbage.Urban soil could trend to be alkaline.In the past,Cinnamomum camphora rhizosphere soil nutrient were studied more,dynamic change of chlorophyll content and leaf nutrient,dynamic changes on Chlorotic Cinnamomum camphora weie mainly studied in this paper,and re-absorption of nutrients and nutrient use efficiency were studied and analized to identify the correlation of nutrient content between chlorophyll content and nutrient use efficiency,and nutrient resorption.Chlorophyll a/b in the different nutritional status has the significant or very significant chaneges.To concrete results,the four status have significant difference,health old leaves and new leaves(p=0.0424),chlorotic old leaves and new leaves(p=0.0072),healthy old leaves and chlorotic old leaves(p=0.0315), Healthy new leaves and chlorotic leaves(p=0.0011).Chlorophyll a/b of the curve in health camphor mad chlorotic camphor change in the trend of inconsistency.Health old leaves and chlorotic old leaves are rising from 1 to 5,but after the health of old leaves and slowly returning to their original level,chlorotic old leaves will continue to rise;new healthy leaves and chlorotic leaves had a similar trend changes,To have continued to rise,after the chlorotic leaves continue to rise,and healthy new leaves dropped to the level of original level,and changes in a small range.Nitrogen,phosphorus,potassium,sulfur,calcium,boron,iron,magnesium, manganese,zinc,aluminum,copper and sodium both in the chlorotic and health nutritional status have significantly different,the trend also.Health camphor chlorotic camphor and calcium content t=0.4092(p=0.6890),zinc content of t=1.6028(p= 0.1330),sodium t=0.7586(p=0.4616),manganese content in t=0.5108(p= 0.6761) And copper content of t=1.6653(p=0.1197) not significant,aluminium content of t=2.50989(p=0.0261) and potassium content of t=2.879(p=0.0129) significantly,the sulfur content of t=7.0777(p=0.0000) And magnesium content of t=3.1350(p=0.0079),iron content t=4.6807(p=0.0004),boron in t=4.2063(p= 0.0010),total phosphorus content of t=3.13769(p=0.0079) and nitrogen content of t=5.9021(p=0.0001) difference was significant.The nutrient element of magnesium,iron and nitrogen has deeply effect to the health of the blade.From the result of comparison studies about the factor analysis,through the chlorotic and the healthy camphor leaves nutrition element,we change the thirteen nutrition elements of the healthy incense camphor tree blade into five mainly factors,the determine factor of the first four are:K,N,Mn;Mg;P; Ca,Fe;Zn.The contribution of the five mainly factors are 40.63%,26.62%,10.47%,8.99%,7.84%.Samely,the thirteen nutrition elements of the chlorotic camphor also change to five mainly factors,the determine factor of the first four are:Fe,Mg,N; P;Mn,Cu,Na;S.The contribution of the five mainly factors are 33.24%,19.02%,13.67%,17.14%,10.36%.The same factors of the health and the chlorotic leaf are Fe,Mg,N,and the totally contribution is more than any other factors.So the three elements have deeply affect to the chlorophy contents and nutrition situation of camphor tree.The phosphorus,manganese,zinc and copper elements in the healthy Cinnamomun camphor leaves has more relative to the chlorophy contents than other factors.The relevance modulus is 0.9853,0.82874,0.975 and 0.84796.but in the chlorotic lives,these elements show very low correlativity,the relevance modulus is 0.0319,0.00706,0.261 and 0.0659.the reason probably is the insufficiency of these factors in the chlorotic incense camphor tree.The boron contents in the chloroticting incense camphor is more than the health.Maybe also because of the bellyful of the boron lead to chlorotic.By the deeply comparison studies about the utility and the absorptivity of the of the chlorophy contents in the leaf and nutrient,we can come to a conclusion:the utility and the absorptivity of nutrient both have much correlativity with the chlorophy contents,the relevance modulus of the utility of absolutely nitrogen;phosphorus and potassium and the chlorophy contents are 0.64827,0.8064 and 0.55737,but the relevance modulus of the utility of nitrogen,phosphorus and potassium and the chlorophy contents are 0.86536,0.8992 and 0.79009.It can be seen from the relevance modulus that the indirect reason of the chlorophy contents is the factors with the high chlorophy correlativity.