黄河下游滩地杨树人工林林下土壤水源涵养功能研究  

Water Conservation Function of Polar Plantations on Lowland in Yellow River

作　　者：于乃胜[1] 李传荣[1] 许景伟[2] 路姗姗[1] 付裕[1] 王卫东[2] 王月海[2] 

机构地区：[1]山东农业大学农业生态与环境重点实验室,山东泰安271018 [2]山东省林业科学研究院,山东济南250014

出　　处：《水土保持学报》2009年第2期61-65,共5页Journal of Soil and Water Conservation

基　　金：国家“十五”科技攻关课题(2002BA516A16-13);山东省可持续发展十大科技示范工程项目;山东省重点项目“农田防护林效益评价”

摘　　要：黄河滩地杨树人工林在防风固沙方面发挥重大的作用,但是在水源涵养功能研究领域相对贫乏。本研究调查和分析了不同林龄、品种(中林46、L35、中荷1号、I-107)和密度杨树人工林的土壤物理性状和水源涵养功能。结果表明:①滩地造林改善了土壤的粒级组成,杨树中林46林随着林龄的增长,石砾和粗砂粒的比例下降,粉粒的比例不断增加;②造林后土壤涵养水源能力上层改善明显,而且随年龄的增加不断提高;③杨树中林46林随造林密度的减小,中等造林密度的整体涵养水源效果优于过密和过稀的林地,在涵蓄降水和饱和蓄水方面呈现增高-降低-增高的趋势;④参试的杨树各品种中,林地上层土壤水源涵养功能增强,而下层有所减少,中林46的水源涵养功能最大;⑥随着连作代数的增加,杨树中林46土壤储水能力略有减小的趋势,但是差异不显著。Polar plantations on lowland in Yellow River play important roles in wind breaking and sand fixing, however their water conservation functions are not given enough attention. The soil properties and water conservation functions of 4 types of poplar plantation, i.e. Populus × eurarnericana CL. ＇Zhonglin 46＇, P. × euramericana ＇L35＇, P. deltoides ＇Zhong He1＇ and P. × euramericana CV. ＇Neva＇, were studied on lowland in Yellow River, the results show as the follows： ① Polar plantations improved its soil physical properties. With the plantation years increased, the soil particle composition changed significantly compared with bare land, the coarse particle size fractions （〉0.25 mm） decreased, but the fine particle size fractions （0.05-0.25 mm） increased significantly; ②The water storing capacities of top soil is better than that of bare land, and increased with forest age growing; ③The water storing functions of Populus × euramericana CL. ＇Zhonglin 46＇ presented the trend of high-low-high with plantation density decreased, P. × euram- iercana CL. ＇ Zhonglin 46＇is the best one compared with P. × eurarnericana ＇ L35＇, P. deltoides ＇ Zhong He1＇ and P. × euramericana CV. ＇Neva＇; ④The total capacities of conservation water of top soil increased, but that of down soil decreased. ⑤The soil storing capacities decreased with continuous planting generations but there were no significant differences.

关 键 词：黄河滩地 水源涵养功能 调蓄降水量 土壤物理性状 杨树 

分 类 号：S714.7[农业科学—林学] S727.21