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[1]ZHANG Ming-zhong,ZHU Hong-ye,SHA Yu-cang,et al.Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-hot Valley of Jinshajiang River[J].Research of Soil and Water Conservation,2010,17(02):156-159.

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Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-hot Valley of Jinshajiang River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 02 Page number: 156-159 Column: Public date: 2010-04-20

Title:: Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-hot Valley of Jinshajiang River

Author(s):: ZHANG Ming-zhong¹, ZHU Hong-ye², SHA Yu-cang¹, ZHANG Ying-cui³, JIN Jie¹, SHI Liang-tao¹, LONG Hui-ying¹, JI Zhong-hua¹; 1. Research Institute for Tropical Eco-agricultural sciences, Yunnan, Aunademy of Agriculture Sciences, Yuanmou Ynnan 651300, China;
2. Science and Technological Division, Yunnan Academy of Agricultural Sciences, Kunming 650231, China;
3. Research Institute for Tobacco Agricultural Scinces, Chuxiong Corporation, Yunnan Tobacco, Chuxiong, Yunnan 675000, China

Keywords:: grass litter; dry-hot river valley; decomposition rate; water-holding capacity

CLC:: S812

DOI:: -

Abstract:: The litter plays an important role in nutrient cycling and energy flow in grass ecosystems. The decomposition rate and water-holding capacity of 6 kinds of grass litter were studied in the Jinshajing river dry-hot valley. The results showed that the dry weight remains reduced with time but didn’t have the direct correlation with time. The decomposition of litters was affected by climate, character of litter, animalcule and soil animal. The climate factors of temperature and humidity were important especially. The water-holding capacity was in sequence of N. wightii (336%), P. notatum Flugge (248%), H. contortus (L.) Beauv (209%), B. pertusa (L.) A.Camus(206%), I. endecaphylla Jacq (174%), D. annulatum (Forsk.) Stapf (168%). After 24 months decomposition, the remaining dry weight of the litter was in sequence as follows: 16.19% for N. wightii, 26.38% for I. endecaphylla Jacq, 32.79% for B. pertusa (L.) A. Camus, 37.62% for P. notatum Flugge, 39.72% for H. contortus (L.) Beauv and 39.76% for D. annulatum (Forsk.) Stapf. The decomposition rate and water-holding capacity of N. wightii are at the highest level. It is important for the development, improvement and conservation of the grassland soil.

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