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本文是福建九龙江口红树林生态系统研究的一个部分,主要讨论20年生秋茄群落的钾、钠的含量及其生物循环。试验结果表明:秋茄群落现存量中,含有钾、钠总量分别为531.97和2100.36公斤/公顷;其中地上部分分别为296.49和742.91公斤/公顷;地下部分分别为235.48和1357.45公斤/公顷。该群落钾、钠生物循环中年吸收量分別为109.15和353.50公斤/公顷·年,归还量分别为59.37和160.18公斤/公顷·年。存留量为49.78和193.32公斤/公顷·年。它的钠含量比钾含量大,周转期钾需9年比钠需13年为快。
This paper is a part of the mangrove ecosystem in Jiulong River estuary in Fujian Province. It mainly discusses the potassium and sodium contents and their biological cycles in the 20-year-old candel foliage community. The results showed that the total contents of potassium and sodium in the Q. candel were 531.97 and 2100.36 kg / ha, respectively, of which the aerial parts were 296.49 and 742.91 kg / ha respectively; the underground parts were 235.48 and 1357.45 kg / ha respectively. The annual absorption of potassium and sodium in the community were 109.15 and 353.50 kg / ha · year, respectively, and the returns were 59.37 and 160.18 kg / ha · year, respectively. The stocks were 49.78 and 193.32 kg / ha · year. Its sodium content than potassium content, potassium turnover period of 9 years needs 13 years faster than sodium.