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[1]BAI Yanying,MIN Qingwen,LI Jing.Water Conservation Function of Forest Soil in Honghe Hani Rice Terrace System[J].Research of Soil and Water Conservation,2016,23(02):166-170.

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Water Conservation Function of Forest Soil in Honghe Hani Rice Terrace System

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 02 Page number: 166-170 Column: Public date: 2016-04-28

Title:: Water Conservation Function of Forest Soil in Honghe Hani Rice Terrace System

Author(s):: BAI Yanying, MIN Qingwen, LI Jing; Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

Keywords:: Honghe Hani Rice Terrace System; Globally Important Agricultural Heritage Systems (GIAHS); soil; water conservation; extreme drought

CLC:: S715.7

DOI:: -

Abstract:: Honghe Hani Rice Terraces System, located in the Ailao Mountain area and the south of Honghe River in Yunnan Province, is one of the Globally Important Agricultural Heritage Systems (GIAHS) sites. The vertical distribution of the Forest-Village-Terrace-River ecological landscape provides a well-functioning water conservation system, which makes it resist the continuous drought events successfully. The typical forest above the Samaba Terrace, core area of Honghe Hani Rice Terraces System, was taken as the study area. The soil water conservation functions of this area were analyzed and evaluated. The results show that the mean soil bulk density is 1.09 g/cm³, the total porosity is 65.1%, the non-capillary porosity is 18.7%, the average soil water storage capacity is 2 589 t/hm², the retention storage capacity is 739 t/hm², the average initial infiltration rate at the top layer is 13.57 mm/min, and the stable infiltration rate is 7.22 mm/min, which means that the condition for water and heat exchange is good, so does the soil permeability. Compared with the forests in other regions of China, Honghe Hani Rice Terraces System has significant soil water conservation ability, which guarantees its resilience to extreme drought events. This system can provide important experience to adapt to extreme climate change and reduce economic losses in agriculture.

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