深圳福田红树林无瓣海桑+海桑群落钙镁钠的累积和循环

Accumulations and Cycles of Ca,Mg and Na of Sonneratia apetala +S.caseolaris Communities of Mangroves in Futian,Shenzhen

研究了深圳福田红树林无瓣海桑 +海桑人工林群落的Ca、Mg、Na元素的吸收、分布、累积和循环。结果表明 ,该群落植物现存量中 ,库存Ca、Mg、Na总量分别为 2 5 975 4 6、10 332 4 6、115 832 16mg·m-2 ,其中地下部分分别为 86 38 93、6 342、894 99 0 1mg·m-2 。该群落Ca、Mg、Na元素生物循环为 :年吸收量分别为 9337 6 2 6、36 73 318、5 0 2 0 3 5 4 7mg·m-2 ,年归还量分别为 4 32 6 96、16 79 2 97、11792 3474 8mg·m-2 ,年存留量分别为 5 0 10 6 6 6、1976 0 2 8、384 11 2 0mg·m-2 ,周转期分别为 :7a、7a、10a。其中Ca。

The results show that the stock Ca,Mg and Na total amounts in the present community plant stocking are 25975.46,10332.46 and 115832.16 mg/m 2 respectively,among which the under ground portions are 8638.93,6342 and 89499.01 mg/m 2 respectively.The Community Ca,Mg and Na element biology cycle is:the annual absorbing amounts are 9337.626,3673.318 and 50203.547 mg/m 2 respectively,annual returning amounts are 4326.96,1679.297 and 11792.34748 mg/m 2 respectively,annual preservative and retaining amounts are 5010.666,1976.028 and 38411.20 mg/m 2 respectively.The turnover periods are 7,7 and 10 years respectively.The Ca and Mg cycles are faster than Na cycle.