【摘要】 对嘉陵江上游严重退化地不同植被恢复类型进行枯落物持水功能研究。结果表明:5种不同植被恢复模式的枯落物储量顺序为火烧迹地灌丛(12.85t.hm-2)>刺槐林(9.76t.hm-2)>刺槐-湿地松混交林(9.52t.hm-2)>青冈林(6.01t.hm-2)>湿地松纯林(3.76t.hm-2)。持水能力的排列顺序为火烧迹地灌丛(33.60t.hm-2)>刺槐林(19.90t.hm-2)>刺槐-湿地松混交林(11.50t.hm-2)>青冈林(8.70t.hm-2)>湿地松纯林(3.70t.hm-2)。虽林分不同,但其浸水实验中枯落物的持水过程均表现出相似的特性,即前期吸水量大(1h以前),并在较短时间内(2～4h)达到较稳定的状态,且与林分生物多样性关系不大。各林分地表枯落物对降水的有效拦蓄量的变化范围为283～2759t.km-2,平均为1253.4t.km-2,其有效拦蓄量的大小顺序为火烧迹地灌丛>刺槐林>刺槐-湿地松混交林>青冈林>湿地松纯林。更多还原

【Abstract】 The study of hydrological benefit of litter fall of different modes of vegetation restoration was conducted in severe degraded areas of upper reaches of Jialing River.The results showed:The total litter stock of the five modes represented a descending order as follows:scrub on burned field(12.85 t\5hm-2) > Robinia pseudoacacia(9.76 t·hm-2)> R.pseudoacacia-Pinus elliotii mixed forest(9.52 t·hm-2)> Cyclobalanopsis glauca(6.01 t·hm-2)> P.elliotii(3.76 t·hm-2);The capacity of preserving water indicated a descending order as follows:scrub on burned field(33.60 t·hm-2)> R.pseudoacacia(19.90 t·h-2)> R.pseudoacacia-P.elliotii mixed forest(11.50 t·hm-2)>C.glauca(8.70 t·hm-2)>P.elliotii(3.70 t·hm-2);As for different forest types,the variation in the process of preserving water of litter fall was not remarkable,the amount of sopped water was large before 1 h and comparable stable in the latter 2～4 h,had no significant relationship with the forest biological diversity.Litter’s modified interception was at an average rate of 1 253.4 t·km-2,ranged from 283～2 759 t·km-2 to 2 759 t·km-2,different forests represented descending order as follows:scrub on burned field> R.pseudoacacia> R.pseudoacacia-P.elliotii mixed forest> C.glauca>P.elliotii.更多还原