Genetic Variations In Carbon Content Of Pinus Sylvestris Var. Mongolica And High Carbon Storage Provenances And Families Selection

Taking the28-year-old Pinus sylvestris provenance (set at Maoershan) test plantation, the34-year-old and32-year-old and (set at Qingshan and Cuohai, respectively) Pinus sylvestris half-sib families progeny test plantation as research objects, We determined and estimated tree height, diameter at breast height (DBH), standing tree volume, wood basic density, carbon content, trunk biomass, carbon storage, lignin content and cellulose content. Then we analysed correlation coefficient and the genetic variations in growth traits, timber characters, biomass of trunk and carbon content by software of spss18. To provide materials for afforestation superior families and provenances of high carbon content were selected out. The main research results are as follows:Provenance test results showed that the genetic variation in volume, biomass and carbon storage were abundant, the variation coefficient were25.322%、26.818%and26.117%. The genetic variations in wood basic density, carbon content, lignin content and cellulose content is relatively less, the variation coefficient were1.479%,6.209%,4.522%and3.038%. Correlation analysis shows that the relativity between carbon storage with growth traits and main biomass is significant positive correlation. Honghuaerji and Tuqiang were chosen as the best provenance. The mean value of carbon storage (30.222kg) was higher than mean value of all families by19.8%.The results of families test show that the genetic variation in trunk volume, biomass of trunk, carbon storage of trunk, biomass of leaves, carbon storage of leaves, biomass of branches, carbon storage of branches, biomass of ground part and carbon storage ground part were rich, the variation coefficient were19.181%,20.955%,20.923%,14.521%,14.940%,19.894%and19.901%. The genetic variations in wood basic density, carbon content, lignin content and cellulose content is relatively less, the variation coefficient were4.011%,1.158%,1.616%and6.566%. Trunk carbon storage is significantly positive correlated with tree height, diameter at breast height (DBH), volume and trunk biomass. According to above results, we analysed the data by the theory of variance analysis and Duncan method.77-19and77-16were chosen as the best families. The value of ground part biomass was40.671kg and37.637kg. The value of ground part carbon storage was40.671kg and37.637kg. The mean value of carbon storage was39.154kg, which was higher than mean value of all families by19.29%.Families test at Cuohai:The genetic variation in volume, biomass and carbon storage were abundant, the variation coefficient were31.421%、31.998%and31.903%. The genetic variations in wood basic density and carbon content are relatively less, the variation coefficient were2.725%and1.868%. There is weak negative correlation between carbon content with the other traits. Correlation analysis shows that the relativity between carbon storage with growth traits and main biomass is significant positive correlation. Finally we select K70and A64as the superior families. The mean value of carbon storage (19.903kg) is higher than mean value of all families36.89%.