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[1]ZHAO Xiao-chun,LIU Jian-jun,REN Jun-hui,et al.Study on Water-holding Capacity of Litter in Four Forest Types of Helan Mountain[J].Research of Soil and Water Conservation,2011,18(02):107-111.

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Study on Water-holding Capacity of Litter in Four Forest Types of Helan Mountain

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 02 Page number: 107-111 Column: Public date: 2011-04-20

Title:: Study on Water-holding Capacity of Litter in Four Forest Types of Helan Mountain

Author(s):: ZHAO Xiao-chun^1,2, LIU Jian-jun^1,2, REN Jun-hui^1,2, LIU Bin^1,2, MU Ji-jun³; 1. College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Helan National Nature Reseve Authority, Yinchuan 750021, China;
3. Inner Mongolian Bayannor Conservation of water and soil station, Bayannaoer, Inner mongolia 015000, China

Keywords:: Helan Mountain; litter; water-holding capacity; water-holding rate; water-absorption rate; modified interception

CLC:: S715.3

DOI:: -

Abstract:: By the methods of field investigation and soaking extraction, the storage, water-holding capacity, water-holding rate, and water-absorption rate of the litter in the mixture of Pinus tabulaeformis and Picea crassifolia, the mixture of Pinus tabulaeformis and Populus davidiana, pure Picea crassifolia, and pure Pinus tabulaeformis plantations in Helan Mountain were studied. The results showed that the litter storage in the four vegetation types decreased in the order of pure P. crassifolia (32.39 t/hm²)>the mixed of P. tabulaeformis and P. crassifolia (26.6 t/hm²)>pure P. tabulaeformis (25.21 t/hm²)>the mixed of P. tabulaeformis and P. davidiana (19.74 t/hm²). The total water-holding capacity of pure P. tabulaeformis, the mixture of P. tabulaeformis and P. crassifolia, pure P. crassifolia and the mixture of P. tabulaeformis and P. davidiana were 38.46, 40.11, 46.78t, 36.35 t/hm², respectively. The proportional water-holding capacity as a percentage of the litter dry weight in pure P. tabulaeformis, the mixture of P. tabulaeformis and P. crassifolia, pure P. crassifolia and the mixture of P. tabulaeformis and P. davidiana were 152.56%, 150.79%, 144.43% and 184.14%, respectively. The water-holding capacity and water-holding rate of the litter changed logarithmically with soaking time. The order of the water-absorption rate of litter was the mixture of P. tabulaeformis and P. davidiana>the mixture of P. tabulaeformis and P. crassifolia≥pure P. tabulaeformis>pure P. crassifolia. The water-absorption rate of four plantations decreased according to equation with increasing time immersed in water. The modified interception of the mixture of P. tabulaeformis and P. davidiana (15.73 t/hm²) was the largest among the four plantations, followed by pure P. tabulaeformis (14.05 t/hm²) and the mixture of P. tabulaeformis and P. crassifolia (11.98 t/hm²), and the smallest was pure P. crassifolia (10.7 t/hm²).

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