Vertical characteristics of the Hani terrace paddyfield ecosystem in Yunnan,China

作     者：Baoshan CUI Zheyuan YOU Min YAO 

作者机构：School of EnvironmentBeijing Normal UniversityBeijing 100875China State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing 100875China 

出 版 物：《Frontiers in Biology》 (生物学前沿（英文版）)

年 卷 期：2008年第3卷第3期

页      面：351-359页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

基　　金：This paper was supported by the State Key Basic Research Development Program of China(No.2003CB415104) 

主　　题：Hani’s terrace paddyfield wetland landscape wetland types wetland water wetland soil vertical characteristics 

摘      要：The Hani terrace paddyfield in Yunnan Province,China is categorized as a‘constructed wetland’under the Lamsar Convention *** Hani terrace paddyfield ranges from an altitude of 144 to 2000 m above sea level(ASL)in the southern slopes of the Ailao Mountains,angling down at a range of 15°to 75°.In this study,we investigated the ecosystem of the terrace paddyfields in the Mengpin and Quanfuzhuang administrative villages located at the center of the cultural heritage conservation district in the Hani terrace *** Hani terrace paddyfield ecosystem structure isforest-village-terrace paddyfield-riverin the order of descending *** and water samples were sequen-tially taken from forests,villages and the terrace paddy-fields to be able to study the vertical characteristics of Hani’s terrace ***_(4)-P and NH_(3)-N in water were measured to test for water *** soil nutrient factors were tested,including organic material(OM),char and nitrogen ratio(C/N),pH,total nitrogen(TN),total phosphorus(TP),available phosphorus(AP),and available potassium(AK).Soil quality was also eval-uated using the characteristics of the soil nutrient *** changes in the landscape,wetland types,wetland plants,hydrology and soil nutrients were *** showed that:(1)Hani’s terrace paddyfield can be divided into five types of wetlands;the rice varieties and cultivation patterns vary in each type of wetland.(2)Hani’s terrace paddyfield has a great capacity for water conservation and a strong ability to purify *** impoundage of Hani’s terrace paddyfield is about 5050 m^(3)/hm^(2).Contaminants in the terrace paddyfield soils decrease exponentially with the decline in altitude.(3)Comparison of soil quality in five different land use types indicates decreasing soil quality from forest to terrace land to terrace paddyfield to water *** for headwater soil,single factors such as OM,TN and TP,and the comp