Gracilaria cultivation dynamic management method based on mathematical model

Abstract

The invention discloses a gracilaria cultivation dynamic management method based on a mathematical model, which comprises the following steps: data acquisition: respectively acquiring the sunlight length L,the NH3-N concentration C1, NO3-N concentration C2, the PO4-P concentration C3, the inorganic carbon total concentration C4, the seawater salinity mean value S and the seawater pH mean value X;constructing a model, and obtaining a management response value Y which is equal to -60.334 + 4.873 * C1 + 27.12 * C2-944.539 * C3 + 82.473 * C4 + 0.741 * S + 5.928 * X-6.196 * L, wherein the unit ofC1, C2 and C3 is mg / L, the unit of C4 is mM / L, and the unit of L is hour; establishing a corresponding relationship between the management response value Y and gracilaria cultivation related parameters, wherein the gracilaria cultivation related parameters includes a hanging water layer, a seedling rope spacing and the single-rope algae amount, and the management response value Y, the hanging water layer, the seedling rope spacing and the single-rope algae amount satisfy the following relationship: when 0 < = Y < = 100, the hanging water layer is 0-1.5 m, the seedling rope spacing is 0.5-1.5 m, and the single-rope algae amount is 5-15kg, and when Y is larger than 100, the hanging water layer is 1.5-2 m, the distance between the seedling ropes is 1.5-2 m, and the single rope algae amount is2-5 kg. Quantitative management of gracilaria cultivation can be achieved, and the cultivation stability and yield are improved.

Description

technical field [0001] The invention relates to the technical fields of aquaculture and seaweed cultivation, in particular to a mathematical model-based dynamic management method for Gracilaria cultivation. Background technique [0002] Gracilaria is an important producer in offshore waters and an important part of my country's offshore aquaculture. The industrial scale involves Liaoning, Hebei, Shandong, Jiangsu, Shanghai, Zhejiang, Fujian, Guangdong and other important coastal provinces and cities. Gracilaria is the second largest cultivated seaweed in my country. It has important economic value, edible value, medicinal value and ecological value, and it is also one of the effective blue carbon sinks in nearshore ecosystems. Statistics show ("2020 China Fishery Statistical Yearbook"): In 2019, the national Gracilaria cultivation output was 348,085 (dry weight), and the cultivation area was 9388 hectares, second only to the kelp cultivation industry. The trend of large-sca...

AI Technical Summary

Problems solved by technology

Restricted by traditional empirical management methods, industrial problems in Gracilaria cultivation have emerged in recent years, such as "seeding off", "white spots" and "head bursting", which have brought huge losses and seriously affected the sustainable and healthy development of the industry

A series of problems brought about by traditional cultivation management methods and the status quo of disorderly development need to be changed urgently

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