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首页> 外文期刊>Fisheries Science >Estimation of light requirement for growth of Zostera japonica cultured seedlings based on photosynthetic properties
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Estimation of light requirement for growth of Zostera japonica cultured seedlings based on photosynthetic properties

机译：基于光合特性的带状带菌种苗生长所需光量估算

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摘要

Photosynthesis and respiration rates were measured on 10 cm tall seedlings of Z. japonica at various temperatures and photosynthetic photon flux densities (PPFDs), and the daily compensation points in each season were estimated with a mathematical model based on photosynthetic properties and diurnal changes in solar irradiances. The seedlings were grown from seeds collected at Tategami-ura, Ago Bay, Mie Prefecture, Japan, and cultured for 1 week under the examined temperatures of 10–25°C. The estimated daily compensation points of Z. japonica ranged from 9.3 to 13.6% of the surface irradiance. The total PPFDs in daytime ranged from 3.8 to 5.3 mol photons m−2 day−1. The theoretical depth limits were calculated by the Beer-Lambert law concerning the relative light intensities of the sea surface and the extinction coefficient. The estimated lowest limit of Z. japonica agreed well with the lowest depth (7 m) previously reported. Therefore, the mathematical model in this study can be used to estimate the production and critical growing depth of Z. japonica. Differences in light requirements seem to be one of the reasons for the shallower habitats of Z. japonica in comparison with Z. marina.
机译：在不同温度和光合作用光子通量密度（PPFD）下，在10 cm高的粳稻幼苗上测量光合作用和呼吸速率，并基于数学模型估算了每个季节的日补偿点，该模型基于光合特性和太阳日变化辐照度。幼苗是从在日本三重县阿哥湾Tategami-ura收集的种子中生长出来的，并在10-25°C的温度下培养1周。粳稻的估计日补偿点在表面辐照度的9.3％至13.6％之间。白天的PPFD总量为3.8 −2 day −1 3.8到5.3 mol光子。理论上的深度极限是根据比尔-兰伯特定律（Beer-Lambert law）计算的，该定律涉及海面的相对光强度和消光系数。估计的Z. japonica最低限度与先前报道的最低深度（7 m）非常吻合。因此，本研究中的数学模型可用于估算粳稻的产量和临界生长深度。与Z. marina相比，光需求的差异似乎是Z. japonica生境较浅的原因之一。

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