A Study on the Provenance Selection of Chinese Fir in the Dagangshan Region
- Received Date: 1991-05-20
- Available Online: 2012-12-04
Abstract: Based on 183 provenances selected from 13 provinces and regions,according to the BIB design of Chinese Fir provenance test,a variance analysis has been made on the height,diameter breast-height,and volume to show that:(1)a marked difference exists in the growth characteristics of the height,the D.B.H and the volume with a result that the quicker growth provenance Chinese Fir is 46% higher,55% bigger in D.B.H.and 2.16 times larger in volume than the slower one;(2) by way of a comprehensive praisal made on the various characteristics of the genetics distance,the provenances have been classified into 4 types,i.e.the fastest growth,the moderate,the slower and the slowest,of which the 12 fastest ones have the genetics gains of 5.22% in H,of 3.81% in D.B.H.and 12.65% in V as compaired with CK,there being a noted tendency that the 12 fastest provenances are centred mainly on Rongjian River valley,southeast of Guizhou Province and northwest of Guangxi Province,and the upper reaches of Minjian River valley,Fujian Province;(3) the provenances are of better heritability of 0.721 6~0.729 9,in H,D.B.H.and V,whose phenotype C.V.is larger than genotype C.V.;the volume genotype C.V.is larger than D.B.H.one,with the latter larger than the height C.V.;of 3 growth characteristics,the genetics variance components account for 11.3%~13.3% in the total variation,replication ones 17.7%~27.8%,and error ones 60.9%-69.0%.