2022年冬奥会崇礼赛区针叶林枯落物及土壤水文效应

doi:10.16843/j.sswc.2021.04.005

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Abstract [Background] Chongli district, Zhangjiakou, Hebei province, is the venue for the 2022 Winter Olympic Games, and the construction of the slide may seriously influence the vegetation of the forest area. Accurate assessment of the hydrological effects of litter and soil layer in the coniferous forest may provide data support for the impact of the construction of the Winter Olympic Games venue on the hydrological function of the forest.[Methods] Three artificial pure forests of Larix principis-rupprechtii, Pinus tabulaeformis and Pinus sylvestris var. mongolica were selected to investigate the hydrological effects of litter and soil at Heping Forest Farm in Chongli district. Soaking and cutting ring methods were used to measure the hydrological effect of litter and soil layers, respectively.[Results] 1) The largest litter accumulation was 23.98 t/hm² in L. principis-rupprechtii. The accumulation amount of the semi-decomposed layer were higher than that of the undecomposed layer in L. principis-rupprechtii and P. tabulaeformis, while contrary result was found in P. sylvestris var. mongolica. 2) The maximum water-holding capacity, effective interception capacity and maximum water-holding rate of the litter were the largest in L. principis-rupprechtii, which were 2.15, 1.72 t/hm² and 632.95%, respectively. It showed a logarithmic relation between the water-holding capacity and water-holding time, and a power function relationship between litter water-absorbing rate and water-holding time. 3) The largest and smallest soil bulk density were 1.23 and 1.01 g/cm³ in P. sylvestris var. mongolica and L. principis-rupprechtii, respectively. While the largest and smallest total porosity of soil was 62.22% and 43.47% in L. principis-rupprechtii and P. tabulaeformis, respectively. Soil infiltration rate increased with infiltration time as a power function. 4)The sort of total water-holding capacity of the forest land was L. principis-rupprechtii (923.93 t/hm²) > P. sylvestris var. mongolica (744.38 t/hm²) > P. tabulaeformis (655.19 t/hm²).The water-holding capacity of the soil layer accounted for more than 99% of the total water holding capacity.[Conclusions] Our results reveal that the largest and least water conservation capacity are the L. principis-rupprechtii and P. tabulaeformis forests. The findings can provide parameters assessment and data support for evaluating the impact of Winter Olympics site construction on hydrological function of coniferous forests.

Key words： coniferous forest litter hydrological effect soil hydrological effect Chongli district

Received: 22 June 2020

PACS:

S714.7

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	GUO Jianjun
	WANG Jiahuan
	HU Jingxia
	YANG Xinbing

Cite this article:

GUO Jianjun,WANG Jiahuan,HU Jingxia, et al. Hydrological effects of litter and soil for the coniferous forest in the Chongli district for 2022 Olympic Winter Games,Hebei province[J]. SSWC, 2021, 19(4): 44-50.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2021.04.005 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2021/V19/I4/44

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