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Citation:

Study on Eco-hydrolog ica l Function of Forest-litter and So il in the SouthSide of L iupan Mounta ins, Ningx ia Hui Autonomous Region, China

  • Received Date: 2006-05-20
  • To study the eco-hydrological function of litter and soil, a naturalmixed forest of oak (Quercus liaotungensis) and linden ( Tilia paucicostata) and a p lantation of larch (La rix principis-rupprech tii) in the smallwatershedof Xiangshuihe in south side of L iupan Mountains of Ningxia Hui Autonomous Region were selected as researchstands. The results showed that: the un2decomposed (Ol ) and semi2decomposed litter (Of ) had a water holding capacity of 5. 42 and 11. 28 t·hm-2 for the mixed stand, 5. 72 and 24. 51 t·hm-2 for the larch forest. The effectivewater holding dep th of litter layer of these two standswere 0. 56 and 1. 63 mm respectively. Itmeaned that the litter’s capability of water holding for larch p lantation was better than that of the mixed stand. The water holding capacities of non2cap illary pores and cap illary pores of 1 m soil layer were 108. 15 and 441. 02 mm for the mixedstand, obviously higher than those for the larch forest ( 65. 80 and 420. 00 mm). Moreover, the effective waterholding capacity of 1 m soil layer for growing season varied between 267. 77~327. 42 mm for the mixed stand, alsohigher than those for larch forest(133. 55~227. 23 mm). As a whole, the eco-hydrological function of forest soil ofmixed stand was better than that of the larch forest. In addition, itwas found that the non-cap illary ratio and cap illary ratio in the effective water holding capacity of 1 m soil layer were 36. 6% and 63. 5% for both stands. Thismeaned that the effective soil water holding capacity, non-capillary water holding capacity, cap illary water holdingcapacity had the equal power as indicator in evaluating the water holding capacity of a thicker soil layer.
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Study on Eco-hydrolog ica l Function of Forest-litter and So il in the SouthSide of L iupan Mounta ins, Ningx ia Hui Autonomous Region, China

  • 1. Forestry College, Shenyang Agriculture University, Shenyang 110161, Liaoning, China
  • 2. Research Institute of Forestry Ecology, Environmentand Protection, CAF, Beijing 100091, China
  • 3. College of Forest Resources and Environment, Nanjing ForestryUniversity, Nanjing 210037, J iangsu, China

Abstract: To study the eco-hydrological function of litter and soil, a naturalmixed forest of oak (Quercus liaotungensis) and linden ( Tilia paucicostata) and a p lantation of larch (La rix principis-rupprech tii) in the smallwatershedof Xiangshuihe in south side of L iupan Mountains of Ningxia Hui Autonomous Region were selected as researchstands. The results showed that: the un2decomposed (Ol ) and semi2decomposed litter (Of ) had a water holding capacity of 5. 42 and 11. 28 t·hm-2 for the mixed stand, 5. 72 and 24. 51 t·hm-2 for the larch forest. The effectivewater holding dep th of litter layer of these two standswere 0. 56 and 1. 63 mm respectively. Itmeaned that the litter’s capability of water holding for larch p lantation was better than that of the mixed stand. The water holding capacities of non2cap illary pores and cap illary pores of 1 m soil layer were 108. 15 and 441. 02 mm for the mixedstand, obviously higher than those for the larch forest ( 65. 80 and 420. 00 mm). Moreover, the effective waterholding capacity of 1 m soil layer for growing season varied between 267. 77~327. 42 mm for the mixed stand, alsohigher than those for larch forest(133. 55~227. 23 mm). As a whole, the eco-hydrological function of forest soil ofmixed stand was better than that of the larch forest. In addition, itwas found that the non-cap illary ratio and cap illary ratio in the effective water holding capacity of 1 m soil layer were 36. 6% and 63. 5% for both stands. Thismeaned that the effective soil water holding capacity, non-capillary water holding capacity, cap illary water holdingcapacity had the equal power as indicator in evaluating the water holding capacity of a thicker soil layer.

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