Abstract:

This paper deals mainly with the properties of the soil of the mangrove in Yingluo Bay Natural Reserve of Guangxi. The results showed that the soil physical and chemical properties and enzyme activities differed obviously between five mangrove communities in Yingluo Bay. The contents of soil silt, clay, organic matter, total N, total P, hydrolyzable N, available P and total salt were in the order of Bruguiera gymnorrhiza community > Rhizophora stylosa community > Kandelia candel community > Aegiceras corniculaturn community > Avicennia marina community. The hydrodase activities of invertase, protease,urease and acid-phosphatase and oxido-xeductase activity of catalese in soils were in the order of R.stylosa community> B.gymnorrhiza community> K.candel community> A.corniculaturn community> A.marina community, but polyphondel oxidase in soil was at the contrary. The contents of nutrient factor and enzyme activities (except catalase) in soils were decreased with increasing soil depth. Enzyme activities in soil were closed related to soil fertilities. There are also correlation among different enzyme activities. So enzyme activity could be used as an index for evaluation of tidal flat soil fertility.

Key words: Mangroves, Soil physical and chemical properties, Soil enzyme activity