The Classification,Structure And Function Of Agroforestry Ecosyetems In Western Liaoning Province

Through surveys and soil properties measurement methods, based on the literature of the progress of Agroforestry system research and on the relation among classification and ecological services of ecosystems.the classification of agro forestry ecosystem in Area of Dalinghe watershed and its principles are put forward according to local conditions such as natural resources,environments,research of agro-forestry ecosystem,development of agro forestry ecosyetem; another, four different models of agro forestry ecosyetem, including agroforestry, forest with herbs, forestry with medical crops ,forest with fruit tree and P. tabulaeformis forest ecosystem were selected to study their ecological services (soil improvement ,water-holding ,soil conservation) .Aimed at agroforestry ecosystem of the Dalinghe watershed area management and sustainable development of a scientific basis.The main research results were summarized as follows:(1) three agro forestry ecosyetems, three management models and seven patterns in area of Dalinghe watershed(2) 0～20cm and 20 ～ 40cm, Comparison of organic matter in different models of agroforestry systems: the order was agroforestry > forest-herbs > forest-medicinal crops > forest-fruit trees > P. tabulaeformis forest ecosystem(3) 0～20cm and 20～40cm, Comparison of Total N in different models of agroforestry systems: the order was agroforestry>forest-herbs>forest- fruit trees medicinal crops>forest-medicinal crops > P. tabulaeformis forest ecosystem(4) 0～20cm , Comparison of Total P in different models of agroforestry systems:the the order was forest-herbs > forest- fruit trees > agroforestry > forest- medicinal crops > P. tabulaeformis forest ecosystem20 ～ 40cm ,the order was forest- fruit trees and agroforestry > forest-herbs > forest-medicinal crops > P. tabulaeformis forest ecosystem (5) 0～20cm and 20～40cm ,Comparison of fast K in different models of agroforestry systems: the order was agroforestry> forest-fruit trees > forest-medicinal crops>forest-hers>P. tabulaeformis forest ecosystem(6) soil thickness : the order was forest-fruit trees > agroforestry > forest-medicinal crops and P. tabulaeformis forest ecosystem > forest-herbs;Form granular soil structure , the order was forest-fruit trees > agroforestry > forest-medicinal crops > forest-herbs >P. tabulaeformis forest ecosystemForm soil erosion, the order was forest-fruit trees > agroforestry > forest-medicinal crops> forest-herbs >P. tabulaeformis forest ecosystemSoil conservation :the order was forest-fruit trees> agroforestry > forest-medicinal crops> forest-herbs >P. tabulaeformis forest ecosystem(7) Comparison of litter quantities and Water-holding capacity of litter in different models of agroforestry systems,water-holding, the order was forest-fruit trees > agroforestry > forest-medicinal crops > agroforestry >forest-hers>P. tabulaeformis forest ecosystem...