Study On Structure And Ecological Function Of Shibataea Chinensis In Ginkgo Biloba And Shibataea Chinensis System

The population structure, growth regulation and ecological function of Shibataea Chinensis were studied. The collected data were analyzed in order to reveal the correlation between population structure and ecological function of Shibataea Chinensis, which provided a theoretical basis for the reasonable application and the optimization of distribution of bamboo. The main results included:1. In the complex system, the volume of shooting of Shibataea Chinensis was different and the result was southeast forest edge>northwest forest edge>gap>understory. The comparison of results about rate of adult bamboo was gap>understory>northwest forest edge>southeast forest edge. Height growth was negatively correlated to the rate of adult bamboo in various quadrats, which concluded edge> understory>gap.2. Bamboo on the northwest forest edge grew best, southeast forest edge and gas were second and understory was worst from the data of density, diameter, height of Shibataea Chinensis in various types.3. The correlations between population structure and the index of ecological function of Shibataea Chinensis were studied and revealed that CO2 absorption and O2 release per unit leaf area and daily release of water and absorption of heat per unit quadrat had significant positive correlation with LAI, density, average height, average diameter. In addition, atmospheric particle-retaining capability was only related to LAI and bactericidal variation capability had no evident relationship with structure of Shibataea Chinensis.4. The roots of Ginkgo Biloba and Shibataea Chinensis underground on the use of soil space were presenting a relationship of ebb and flow. The roots on the basis of the overall co-ordination had interspecific competition in a certain space .So both competition and cooperation existed between the roots of the two species in soil distribution.5. Soil nutrient including organic matter content and available N, available P, available K and soil nutrient-root length density at soil 0~20 had linear correlation and high fitting goodness. Root weight density at soil 20~40 had negative relation to available N, available P, but no association with organic matter content, available K.