首页|Drainage of paddy terraces impacts structures and soil properties in the globally important agricultural heritage of Hani Paddy Terraces,China

Drainage of paddy terraces impacts structures and soil properties in the globally important agricultural heritage of Hani Paddy Terraces,China

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Marginalization and abandonment of paddy terraces are widespread,but their effects on the sustain-ability of subsequent agricultural production are still unknown.Hani Paddy Terraces,included in Globally Important Agriculture Heritage Systems,are threatened by paddy fields drainage.Here,changes in terrace structure,the productivity of topsoil(0-20 cm),and soil water holding capacity at 0-70 cm depth were determined in a case study of Hani Paddy Terraces in Amengkong River Basin in Yuanyang County in Southwestern China,which had been converted into dryland terraces for 2-14 years.Our results showed that:(1)The degree of terrace structures degradation exhibited a U-shaped curve with increasing time since draining,with those drained for 5-9 years having the best structure;(2)Soil productivity index decreased first and then increased with time after conversion;(3)Maximum water holding capacity at 0-70 cm soil depth dramatically decreased after conversion and such trend became increasingly obvious with increasing time since conversion.Our study revealed that drainage of paddy terraces along with associated changes in crop and field management led to an increase in soil pro-ductivity,but degradation of terrace structures and a decrease in water holding capacity will inhibit restoration to paddy terraces.These findings enhance the understanding of the biophysical changes due to marginalization in paddy terraces.

Hani paddy terracesTerraces marginalizationTerrace structure degradationSoil productivityWater holding capacity

Ming Wang、Li Rong、Yanbo Li、Jiangcheng Huang、Yuanmei Jiao、Xiaoyan Wei

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Institute of International Rivers and Eco-Security,Kunming 650500,China

Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security,Kunming,650500,China

Power China Kunming Engineering Corporation Limited,Kunming 650051,China

Department of Geography,Yunnan Normal University,Kunming,650500,China

Yunnan Provincial Archives of Surveying and Mapping(Yunnan Provincial Geomatics Centre),Kunming,650032,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

415015924206104442061074

2024

10.1016/j.iswcr.2023.06.002

国际水土保持研究(英文)

国际水土保持研究(英文)

ISSN：2095-6339
年,卷(期)：2024.12(1)
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