沙质海岸不同植被类型土壤水源涵养功能的研究

Study on Water Conservation Capacity of Different Vegetation Types in Sandy Sea Coastal Area

对沙质海岸不同植被类型水源涵养功能进行研究,结果表明:不同植被类型改良土壤物理性质和涵养水源的能力有较大差异,混交林地比纯林和草甸具有更好的改良土壤作用和涵养水源功能。黑松紫穗槐混交林、黑松刺槐混交林、黑松麻栎混交林、黑松纯林和草甸的总贮水量分别为1 973.97 t/hm2,1 760.95 t/hm2,1 727.44 t/hm2,1638.60 t/hm2和1 413.04 t/hm2,其中土壤层贮水量占总蓄水量的97%以上,而其枯落物的最大持水量依次为15.3t/hm2,22.15 t/hm2,43.42 t/hm2,11.27 t/hm2和9.4 t/hm2。因此,建议沙质海岸植被恢复以乔灌混交林为主。

The water conservation capacity of different vegetation types are studied in the sandy sea coastal areas. The results show the follows： there are significant differences between the soil physical properties and the water conservation capacities among vegetation types. The mixed forests have higher water conservation capacity and better soil physical property improving. The total water-holding capacities of the mixed Pinus thunbergii and Amorpha fruitcosa forest, the mixed Pinus thunbergii and Robinia pseudoacacia forest, the mixed Pinus thunbergii and Quercus acutissima forest, the pure Pinus thunbergii forest and Meadow are 1 973.97 t/hm^2, 1 760. 95 t/hm^2, 1 727.44 t/hm^2, 1 638. 60 t/hm^2 and 1 413.04 t/hm^2 respectively. Among them, the water-holding capacities of soil take up more than 97% of the total, while that of the litter are 15.3 t/hm^2,22.15 t/hm^2,43.42 t/hm^2,11.27 t/hm^2 and 9.4 t/hm^2 respectively. Therefore the mixed forest of arbor and shrub should be cultivated in the region in plantation practice in the future.