The Cultivation Technique of Black Locust Nectariferous Forest
Gao Hongzhen, Bi Jun(Hebei Academy of Forestry Science, Shi Jiazhuang 050061, P.R.China)
The investigation results for abundant temporary and permanent plots show that the flower mass of individual tree is mainly determined by its genetic factor, and also affected by environmental conditions such as sunlight. No flower or few flower trees are about 20 3% in the population. The pruning of nectariferous forest should be replaced by thining, reserving efficient shoot in canopy class. Cut no flower and few flower individuals. The present nectariferous forest should be regenerated by high yield trees or new varieties. Its reasonable canopy density is 0 6～0 8, the management period is 15～20 a.