红树植物对养殖水体中营养盐和浮游植物的影响

Impact of mangrove on nutrien salts and phytoplankton in aquiculture system

对深圳沙井镇9个种植红树的鱼塘和一个无红树植物的对照塘水体中营养盐及浮游植物进行了为期1 a的调查研究。结果表明:在鱼塘中种植红树植物能有效降低养殖水体中的营养盐浓度,种植不同种类及不同面积比例红树的鱼塘对N、P营养盐的降低效果无明显的差异,对照塘中浮游植物的密度和生物量均高于种植红树的鱼塘,其初级生产力亦远高于实验塘。

Nutrient salts and phytoplankton were examined over a one-year period in nine ponds planted with the mangrove trees and one control pond without the mangrove trees in Shenzhen, Guangdong Province. The planted mangrove species include Sonneratia caseolaris, Kandelia candel and Ageicera.s comiculatum with planting area proportion of 15 %, 30% and 45% respectively. The results showed that the mangrove can effectively decrease the concentration of DIN and DIP, but there were no significant differ- ences among ponds planted with different mangroves and in different area proportion. Phytoplankton density and biomass in control pond were higher than those in experimental ones, and primary productivities in control pond were much higher than those in experimental ones.