The cultivation of juvenile crabs in plastic greenhouses is the technical basis for the development of various models of crabs and is an important part of raising the survival rate of seedlings and the size of commodity crabs. The technical points are as follows:

(a) Construction and .......

For a long time, chitin hidden in the shell of shrimp head has been considered as garbage and naturally lost. It has not been discovered until recently by scientists and technicians that chitin and its derivative products have been used in agriculture, medicine, food, chemical industry, cosmet.......

According to the definition of food additives by the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO), food additives are consciously added in sma.......

Before planting, prepare the ground. Asparagus is suitable for cultivation in sandy loam soil with loose and fertile soil, good air permeability, deep soil layer, rich organic matter, and pH value of 6-8. Fertilize the field first, apply 3,000 kg .......

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