Application of Fertilizers in Pinus massoniana Plantations in Daqingshan, Guangxi Province
- Received Date: 1990-12-03
- Available Online: 2012-12-04
Abstract: A fertilizer application trial on the 10-year-old and 2-year-old Pinus massoniana plantations had been practised for 3 years and their growth were recorded by establishing permanent sample plots.The results showed that,in the 10-year-old stands treated with 122.5 kg/haa and 225.0 kg/haa of superphosphate (15% P2O5) for 2 years successively,the volume productions were respectively increased by 11.3% and 14.5%,compared to the check stands.Fertilizers should be applied when the total contents of N,K and P in soil for the tree's growth are under 0.1%,0.1% and 0.04% respectively.And it is suggested that fertilization would be effective for the middle age forest,but not for the young unless the soil in the young plantations are extremly meagre.