主要气候、土壤因素对兰考泡桐生长影响的初步研究

本文借助树木气候学，树木年代学的研究方法，经典林木研究手段和个体生态学理论相结合，对兰考泡桐进行了初步研究，结果发现，材积指数更能反映兰考泡桐生长和生态因素之间的关系，发现日照百分率、日照时数、≥10℃积温、土壤质地、土层深度和土壤肥力等因素对兰考泡桐生长影响较大，另外还对兰考泡桐速生条件进行了较为广泛的讨论，证明兰考泡桐在黄淮海平原中部大有发展前途，农桐间作、农田林网是一种合理的群落类型。

A PRELIMINARY STUDY ON THE EFFECT OF THE MAIN CLIMATIC AND EDAPHIC FACTORS ON THE GROWTH OF PAULOWNIA ELONGATA

Paulownia elongata is a native plant of the Huanghuaihai Plain. In the present paper, P. elongata is mainly studied of the ecological habitats of the plant with the methods of dendroclimatology, dendrochrology, forestry and autoecology. It was found that the volume index is better than the yearly ring index in reflecting the relationship between the growth of P. elongata and the ecological factors. The results based on analysing the annual mass of P. elongata regarding climatic ecological factors by the mono-correlative, poly-correlative and stepwise multiple linear regression analyses show that the percentage of sunny time, hours of sunny time, ≥IO℃ accumulative temperature and rain-fall are the most important among the climatic factors affecting the growth of P. elongata. According to the analysis of soil factors and physical characters, we believe that the texture, depth and nutrients of the soil are more important than other soil factors affecting the growth of P. elongata. Furthermore, we have extensively discussed the fast-growth conditions of P. elongata and divided its growth area into different regions. Finally, we are convinced that P. elongata has a great potentiality for development and that intercropping with P. elongata is a real community type for intercropping in the central region of the Plain.