Comparison of several soil nutritions in pure Cunninghamia lanceolata plantations and mixed forests, and relationship between nutrition and growth factors
After comparing the soil nutritions in pure Cunninghamia lanceolata plantations and mixed forests of C. lanceolata and Pinus massoniana, Phyllostachys heterocycla, Michelia macclurel, Schima superba and Vernicia fordii, the correlation analysis on soil nutrition content and C. lanceolata growth factor was conducted. The results are as followings: (1) The nitrogen, phosphorus and organic matter contents raised and the soil pH decreased in mixed forests of C. lanceolata and Pinus massoniana; the nitrogen and potassium contents increased in mixed forests of C. lanceolata and P. heterocycla; the nitrogen and organic matter contents increased and the soil pH decreased in mixed forests of C. lanceolata and V. fordii; the soil pH raised in mixed forests of C. lanceolata and S. superba. (2) There were significantly influences of soil pH, organic contents on DBH, height of C. lanceolata. And there was a significantly influence of nitrogen content on height of C. lanceolata. The stimulative influences of five forest stand types on growth factors of C. lanceolata ordered from high to low as following: P. massoniana > V. fordii > P. heterocycla> M. macclurel. And the mixed forests of C. lanceolata and S. superba can't improve the growth of C. lanceolata.
NETL
NSTL
万方数据
维普
