Regulating the Carbon-to-Nitrogen ratio for enhanced reconstruction efficiency in Litopenaeus vannamei aquaculture systems.

Intensive shrimp farming faces challenges of water quality deterioration and excessive chemical usage. This study utilized glucose supplementation to regulate carbon-to-nitrogen ratios (C/N): C/N = 5 (control), 10, 15, and 20, comprehensively evaluating impacts on water quality, shrimp growth performance, and product quality. Results revealed that C/N = 20 significantly improved the aquatic environment, achieving reductions of 57.

Salicylic Acid Improved the Growth of and Increased the Proportion of -β-Carotene Isomers.

is an important source of natural β-carotene (containing and isomers) for industrial production. The phytohormone salicylic acid (SA) has been proven to have impacts on the stress resistance of higher plants, but research on microalgae is currently unclear. In this study, the effects of SA on the growth, biochemical composition, antioxidant enzyme activity, key enzymes of β-carotene synthesis, and cis-and trans-isomers of β-carotene in under different salt concentrations were investigated.