“罗望子+木豆”乔灌复合模式林水土保持功能的叠加效应初探  

Accumulation effects on function of the high-brush forest compound model of the 'Tamarindus+Cajanus cajan'

作　　者：拜得珍[1] 纪中华[1] 沙毓沧[1] 赵艳萍[2] 潘志贤[1] 

机构地区：[1]云南省农业科学院热区生态农业研究所,云南元谋651300 [2]福建农林大学林学院,福建福州350002

出　　处：《西南农业学报》2006年第4期611-615,共5页Southwest China Journal of Agricultural Sciences

基　　金："十五"国家攻关项目资助(2001BA606A-07)

摘　　要：以降水等级为主要影响因子，研究了罗望子（Tamarindus indica）＋木豆（Cajanus cajan）乔灌复合模式林对降雨的截留、贮存所产生的水保效应。结果表明：罗望子人工林冠层和复合木豆人工灌木林林冠层年截留降雨量分别为97．99和145．4mm，分别占全年降雨量水的17．48％和25．86％；罗望子人工林的树干茎流率占大气降水的2．37％；复合模式林枯枝落叶的蓄积量为7．08t／hm^2，对降水的平均截留率为12．47％，其最大持水量相当于1．8mm的降水；模式林表层土壤（0～40cm）滞留水分能力相当于2．7mm降雨，贮存土壤水分能力可达1553．2t／hm^2，产生径流的最小降雨量为35．4mm，其侵蚀模数和径流模数比对照减少98．52％和93．21％，体现出了良好的水土保持和水源涵养效应。The mechanism and effects of soil and water conservation of the rainfall interception and the storage capacity in the high-brush forest compound model of the ‘ Tamarindus iridica ＋ Cajanus cajan ＇ have been studied in this paper using the major factor of the rainfall classes. The couclusions show that the intercepted precipitation of‘Tamarind and ＇ Tamarindus irdica ＋ Cajanus cajan ＇artificial forest are 97.9 mm and 145.4 mm, making up 17.48 % and 25.86 % of yearly total rainfall respectively. Its stemflow accounts for 2.37 % of rainfall; Litter storage of the compound model is 7.08 t ·hm^-2 and the intercepting rate averages 12.47 %, its minimum water-holding capacity is equivalent to the rainfall in 1.8 ram; The soil（0- 40 cm） hold-up water capacity of the model is equivalent to the rainfall in 2.7 mm,the water storage capacity is reached 1153.2 t·hm^-2, the minimum of rainfall reaches 35.4 mm,the erosive modulus and the rate of runoff are decreased by 98.52 % and 93.21 % over the CK,which shows the better in the effects of water and soil conservation and the conservation of headwater.

关 键 词：复合模式 降水等级 降水截留 水土保持机理 效应 

分 类 号：S157.2[农业科学—土壤学]