东江是广东省重要的河流，东江水源林的质量直接关系到流域内的社会和经济的发展，关系到深圳和香港的生活用水。作者针对现有水源林生态功能较差的情况，在广东省东源县设计和营造了8种不同混交类型的水源林，并对其林地枯落物和土壤持水能力进行了调查研究。结果表明，与对照的马尾松纯林相比，红锥×枫香混交组合、楠木×锥栗混交组合以及格木×海南红豆混交组合林地枯落物持水能力有较大提高；枫香×樟树混交组合、楠木×锥栗混交组合、红苞木×枫香混交组合以及红锥×枫香混交组合土壤持水能力明显提高。综合枯落物和土壤持水特性对各混交类型进行聚类分析，将8个混交组合进行分类，其中椆木×红锥混交组合、马尾松纯林、火力楠×红锥混交组合以及木荷×椆木混交组合林地持水能力较差；格木、海南红豆混交组合和红锥、枫香混交组合林地持水能力一般；红苞木×枫香混交组合和枫香×樟树混交组合林地持水能力较好；楠木×锥栗混交组合林地持水能力最好。总体上，造林初期，水源涵养试验林在提高原有林地持水能力方面已取得了一定的效果。

（转载自：《生态环境》15卷4期/2006-07　作者：陈红跃(Hong-Yue Chen);刘钱(Qian Liu);康敏明(Min-Ming Kang);刘烈旺(Lie-Wang Liu);徐英宝(Ying-Bao Xu) ）

　　Dongjiang is one of the important rivers in Guangdong province, the quality of the forest for water conservation has a direct relationship with the social and economic development in Dongjiang drainage area as well as living water of Shenzhen and Hongkong. Aiming at the poor ecological functions of the existing forest for water conservation, 8 types of mixed forests for water conservation had been designed and planted in Dongyuan county of Guangdong Province and the water-holding capacity of litter and soil was studied. The results showed that, compared with the check sample-plot of Pinus massoniana, the water-holding capacities of litter showed a great improvement in the stands of Castanopsis hystrix×Liquidambar formosana, Phoebe nanma×Castanopsis chinensis and Erythrophloeum fordii×Ormosia pinnata. The water-holding capacities of soil enhanced greatly in the stands of Liquidambar formosana×Cinnamomum camphora, Phoebe nanma×Castanopsis chinensis, Rhodoleia championii×Liquidambar formosana and Castanopsis hystrix×Liquidambar formosana. Using clustering method, the water-holding capacity of litter and soil of the 8 mixed types were classified. The water-holding capacities of the stands of Lithocarpus thalassica×Castanopis hystric, pure Pinus massoniana(check sample-plot), Michelia maclurei×Castanopsis hystrix and Shima superba×Lithocarpus thalassica were relatively poor; Erythrophloeum fordii×Ormosia pinnata and Castanopsis hystrix×Liquidambar formosana mixed stands were in the middle; Rhodoleia championii×Liquidambar formosana and Liquidambar formosana×Cinnamomum camphora mixed stands were better; and Phoebe nanma×Castanopsis chinensis mixed stands was the best. As a whole, at the early period of the afforestation, the mixed forests for water-conservation had played an important role in the improvement of the water-holding capacity of the original forest.