Comparison on growth parameters and sequestration efficiency of carbon, nitrogen and phosphorus between two strains of Pyropia haitanensis
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Received:June 13, 2018  Revised:March 17, 2019
DOI:10.12024/jsou.20180602337
Key Words: Pyropia haitanensis  yield  CNP sequestration efficiency  carbon sequestration in fisheries  seawater cleaning
Author NameAffiliationE-mail
WANG Yijuan Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou Vocational College of Science and Technology, Wenzhou 325006, Zhejiang, China  
YING Miaomiao Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou Vocational College of Science and Technology, Wenzhou 325006, Zhejiang, China  
ZHOU Qinghao Dongtou Fisheries Science and Technology Extension Service, Dongtou 325700, Zhejiang, China  
XU Caolu Dongtou Fisheries Science and Technology Extension Service, Dongtou 325700, Zhejiang, China  
QUAN Wei Wenzhou Key Laboratory of Adding Carbon Sinks and Reducing Carbon Emissions of Agriculture, Forestry and Fishery Ecosystem, Wenzhou Vocational College of Science and Technology, Wenzhou 325006, Zhejiang, China 49100892@qq.com 
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Abstract:
      Two strains of Pyropia haitanensis ("Native Dongtou" and "Eastern Zhejiang NO.1") were selected as research materials in Dongtou aquaculture district. The thallus length, dry weight, CNP content were determined at different harvest stages, as well as the S value, yield, and sequestration efficiency of carbon, nitrogen and phosphorus were calculated. The results showed that with the extension of harvest time, the thallus length of two strains of Porphyra haitanensis decreased gradually, the dry weight and S value of single thallus increased gradually, the yield increased first and then decreased, and the sequestration efficiency of CNP increased as a whole. The length and dry weight of single thallus of "Native Dongtou" from the first harvest to the fourth harvest were higher than those of "Eastern Zhejiang No.1". The yield and CNP sequestration efficiency of "Native Dongtou" from the second harvest to the fourth harvest were higher than those of "Eastern Zhejiang No.1". There was no significant difference in S value between the two strains of Porphyra haitanensis. The total sequestration efficiency of CNP for "Native Dongtous" from the first harvest to the fourth harvest was 900.74 kg/hm2, 110.16 kg/hm2, 14.16 kg/hm2,respectively. The total sequestration efficiency of CNP for "Eastern Zhejiang NO.1" was 683.34 kg/hm2, 84.3kg/hm2 and 10.75 kg/hm2, respectively. The above indexes showed extremely significant difference among different harvest stages (P<0.01), but no significant difference between different strains (P>0.05). The results are helpful to further understand the growth characteristics and ecological benefits of Porphyra haitanensis culture.