深圳福田红树林无瓣海桑+海桑群落N、P、K累积和循环

研究了深圳福田红树林无瓣海桑 +海桑群落的 N、P、K元素的累积和循环。结果表明 ,该群落 N、P、K元素的现存累积量分别为 :3 8694.92、 5 848.62、 5 0 861 .47mg/m2 ,其中地下部分分别占 2 8.5 9%、41 .77%、 42 .0 8%。该群落氮、磷、钾元素生物循环中 ,年吸收量分别为 :1 3 2 40 .0 95、 1 887.70 5、 2 0 73 6.1 1mg/m2 ;年归还量分别为 :62 70 .5 85、 979.1 75、 63 5 3 .948mg/m2 ;年存留量分别为 :6969.5 1、 90 8.5 3、 1 43 82 .1 62 mg/m2 ;周转期分别为 :7a、6a、9a。群落各组分的氮含量最高 ,磷含量最低。

Accumulation and cycle of N、P、K elements in Sonneratia apetala+S. caseolaris mangrove community at Futian of Shenzhen, China

The accumulation, distribution and cycle of N,P and K in S. apetala+S. caseolaris mangrove community at Futian Mangrove Nature Reserve of Shenzhen have been studied in this paper. It is measured that the amounts of N,P and K in the standing crop of this commuity were 38 694.92 mg/m2,5 848.62 mg/m2,50 861.47 mg/m2,of which the amounts of the three elements in the biomass under ground were N:28.59%,P:41.77%,K:42.08%. In the cycle of N,P and K of this community,the annual uptake was 13 240.095 mg/m2,1 887.205 mg/m2,20 736.11 mg/m2,respectively. The annual retention was 6 969.51 mg/m2,908.53 mg/m2,14 382.162 mg/m2,respectively. The annual return was 6 270.585 mg/m2,979.175 mg/m2,6 353.948 mg/m2,respectively. The speed of N,P and K recycling period are 7,6,9 years,respectively.