沙质海岸5种植被类型土壤物理性状及其水源涵养功能

Soil Properties and Water Conservation Function of 5 Types of Vegetation on Sandy Coast

通过对沙质海岸5种植被类型的土壤物理性状和水源涵养功能的研究,结果表明:(1)混交林和草地的土壤物理性状及贮水能力明显优于纯林地的土壤物理性状;(2 ) 5种植被类型土壤的涵养水源能力大小依次为草地>黑松刺槐混交林>黑松纯林>柽柳林>刺槐纯林;表层土壤高于底层土壤;(3)各植被类型枯落物的饱和持水率在10 5 12 % 4 5 3 6 4 % ,水容量在4 5 833 17t/hm2 之间;刺槐纯林枯落物的水源涵养功能最大;(4) 5种植被类型的涵养水源量在14 76 6 6～1870 38t/hm2 之间。

The soil properties and water conservation function of 5 types of vegetation were studied on sandy coast, the results show as the follows: (1) Soil properties and the storing capacity of water of meadow and mixed forest were better than that of pure forests; (2)The sequence of the water conservation function of soil is Meadow> Mixed forest of Japanese Black Pine and Silver Chain>Japanese Black Pine forest > Chinese tamarisk forest > Silver Chain forest; The water conservation function of the surface layer is higher than that of substrate; (3)The water-holding rate of saturation and water capacity of litter range from 105.12% to 453.64% and 4.58 t/hm^2 to 33.17 t/hm^2 respectively, and the best type is Silver Chain forest; (4)The total capacities of conservation water vary from 1 476.66 t/hm^2 to 1 870.38 t/hm^2. Among them, the total water capacities of soil are above 98% of the total.