太行山刺槐花量与蜜源林经营

通过对大量标准地的调查研究表明，单株开花量主要受自身遗传因素的控制，单株在量为0－5．2kg／株，同一单株各年度的开花量也有较大变化。林分花量与林龄、林分平均胸径、林分平均高、林分优势木平均高、每公顷胸高断面积、每公顷蓄积、林分总生物量、林分干量、林分枝量、林分叶量、林分根量等林分因子均具有极显著的相关关系，通过逐步回归分析，筛选出影响林分花量的主要林分因子，并建立了林分花量的多元回归估测模型。林分花量生长动态符合生物增长的Logistic运动规律，其速生点为8a，速生期为4-12a，林分生长后期的花量动态与干、枝、叶、根等其它器官的生长动态存在显著差异，上述结论对蜜源林的经营具有重要意义。

STUDY ON THE FLOWER MASS OF BLACK LOCUST AND MANAGEMENT OF NECTARIFEROUS FOREST IN TAI HANG MOUNTAIN

The black locust (Robinia pseudoacacia L.) is one of most important nectariferous tree species. Most of black locust forests are not fit for timber production. They are suitable for managemnt as nectar source. Based on 490 sample trees and 81 plots, the flower mass of individual tree and stand of black locust were studied. The flower mass of individual tree is 0-5. 2kg per tree. It is determined by its genetic factor. The flower mass of stand hasclose links with age, G, D, H, M, Wt, Ws, Wb, W, Wl et al. After analysis regression step by step, the main factors that affect the flower mass of stand were screened and the multiple regression estimation model of flower mass of stand was established. The growth dynamics of stand flower mass fdllows the Logistic.The fastest growing point is at 8 years. Its rapid growth period is at 4-12 years. There are significant differences between flower mass dynamics and the growth rules of stem, branch, leaf and root at the late phase of stand growth- These results are useful for the management of nectarferous forest.