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首页> 外文期刊>American journal of applied sciences >Effects of Temperature and pH on the Growth of Sargassum linearifolium and S. podacanthum in Potassium-Fortified Inland Saline Water
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Effects of Temperature and pH on the Growth of Sargassum linearifolium and S. podacanthum in Potassium-Fortified Inland Saline Water

机译：温度和pH值对钾强化内陆咸水中Sargassum linearifolium和S. podacanthum生长的影响

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摘要

This study tested the effects of temperature and pH on water quality and the growth of Sargassum linearifolium and S. podacanthum in potassium-fortified Inland Saline Water (ISW) of Western Australia (WA), at two levels of pH (low pH range of 5.5-6.5 and ambient pH 7.0-8.2) and two levels of temperature (high temperature 26-27°C and ambient room temperature of 20-22°C) in triplicate for 42 days. The pH of ISW in WA varies from 3.9 to 9.1, whereas the temperature is from 6.1-28.1°C. The results showed that the high temperature initiated the mortalities of the both Sargassum species from the first 14 days of culture period. The high temperature also resulted in a reduction of dried weight and ash content of these two species of Sargassum by the end of the trial. S. linearifolium temperature tolerant threshold was larger than S. podacanthum. Since the day 14, the S. linearifolium biomass and specific growth rate were higher than S. podacanthum at both temperature levels under ambient pH. Higher crude protein in S. linearifolium than S. podacanthum was also recorded at high temperature. Ambient pH and ambient temperature resulted in higher biomass and higher specific growth rate than low pH and high temperature in both species, which is recommended for Sargassum spp. growth.
机译：这项研究测试了温度和pH值在两个pH值水平（低pH值范围为5.5）下，在西澳大利亚州（WA）的钾强化内陆咸水（ISW）中对水质以及Sargassum linearifolium和S. podacanthum生长的影响。 -6.5和环境pH值7.0-8.2）和两个温度水平（高温26-27°C和环境室温20-22°C）一式三份，持续42天。 WA中ISW的pH值在3.9至9.1之间，而温度在6.1-28.1°C之间。结果表明，从培养的第一个14天开始，高温导致了两种Sargassum物种的死亡。在试验结束前，高温还导致了这两种藻类的干重和灰分的减少。线性链霉菌的温度耐受阈值大于荚果链霉。从第14天开始，在环境pH值的两个温度水平下，线性链霉菌的生物量和比生长速率均高于桔梗。高温下还记录了线性叶链霉菌中的粗蛋白含量高于荚果链球菌。 pH和环境温度均比两种物种的低pH和高温导致更高的生物量和更高的比生长速率，建议将其用于Sargassum spp。增长。

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