Abstract:
Growth conditions and timber quality of
Pinus yunnanensis are decided by seeds'genetic characters.Because forests are afforested on wastehills where
Pinus yunnanensis is distributed, many seeds are needed.How to outcome earlier and more wasn't solved by many forestry workers.Through analysing, the authors drew the conclusion that
Pinus yunnanensis seed tree forests applying fertilizer could significantly increase growth incremnet of cone.Contrasted with those without applying fertilizer, cone quantity of per
Pinus yunnanensis seed tree forests applying CO(NH
2)
2 400g could increase by 103%;cone quantity of per tree applying K
2SO
4 500g could increase by 70%;cone quantity of per tree applying Na
2B
4O
7·H
2O 400g could increase by 62%;cone quantity per tree applying Ca(H
2PO
4)·H
2O 500 could increase by 83%.