不同野生种源鼠尾藻生长及固碳速率

为了筛选高固碳效率的野生鼠尾藻，指导鼠尾藻人工苗种的繁育及养殖，应对全球气候变化增加渔业碳汇，笔者将来自台州椒江、福建平潭、温州洞头、舟山嵊泗的野生鼠尾藻种苗在洞头近海进行养殖，测定它们的长度及质量，对其生长速率、固碳速率等进行分析。结果表明：温州洞头野生种源鼠尾藻在收获前，单株长度及质量均最大，与其他种源鼠尾藻相比，长度呈极显著差异(P＜0.01)，生物量呈显著差异(P＜0.05)；不同种源鼠尾藻S值差异显著(P＜0.05)，福建平潭野生种源鼠尾藻S值最大；通过标准化转换，温州洞头野生种源鼠尾藻的固碳速率最高达0.86 t C/(hm2·a)，可与林业树木固碳相媲美。建议今后在温州洞头开展鼠尾藻养殖，应大力推广本地野生鼠尾藻种质，但应着力开发人工育苗技术，保护野生鼠尾藻资源。

Growth and Carbon Sequestration Rate of wild Sargassum thunbergii from Different Sources

In order to select Sargassum tbunbergii which had high carbon sequestration rate, to gulae artmclai seed breeding and farming, and to increase fisheries carbon sinks response to global climate change, wild S. thunbergii from Jiaojiang Taizhou, Pingtan Fujian, Dongtou Wenhou and Shengsi Zhoushan were cultivated in Dongtou. The length and weight were determined, the growth rate and carbon sequestration rate were analyzed. The result showed that： the maximum length and weight of wild S. thunbergii was from Dongtou Wenhou, the length of different sources had very significant difference （P〈0.01）, the weight of different sources had significant difference （P〈0.05）. It was found that factor S, which was the ratio of fresh weight to length of a single algae, the maximum S value of wild S.thunbergii was from Pingtan Fujian, had significant difference （P〈0.05） among different sources. The maximum carbon sequestration rate by standardized conversion was Dongtou Wenhou （0.86 t C/（hm^2·a）, and comparable with the forest. Therefore, people should vigorously spread the local S.thunbergii germplasm, develop artificial breeding technology and protect the wild S. thunbergii resources in Wenzhou.