Study on root soil physics and chemistry differences in Castanopsis fissa half-sibfamilies
Annotatsiya
In order to study half-sib families of Castanopsis fissa's root soil physics and chemistry differences, fifty two seven-yearold C. fissa half-sib families growth were investigated by adopting randomized complete block test method, and through selecting 9 representative C. fissa families' rhizosphere soil as the materials, theirs differences in rhizosphere soil nutrient contents and correlations of rhizosphere soil nutrient contents to tree height and diameter at breast height were analyzed. The results show that C. fissa rhizosphere soil pH values were lower than that of non-rhizosphere soil pH values and the changing laws of organic matter contents were just the opposite, and rhizosphere and non-rhizosphere p H value, organic matter content in the soils had significant differences; C. fissa's halfsib families rhizosphere and non-rhizosphere soil available P contents were significantly different, and hydrolyzed N and available K contents both had very significant differences. The tree height, DBH negatively correlated with total P concentration, correlation coefficients were-0.682 4, 0.598 0; and the tree height, DBH positively correlated with hydrolysis N, available K contents, and the correlation coefficients of tree height and hydrolysis of N, available K contents were 0.567 8, 0.630 7, the correlation coefficients of DBH and hydrolysis of N, available K contents were 0.595 0, 0.774 2; however, DBH had weak correlation with organic matter, total N, total K, available P.