Winter and spring cucumber farming notes
The temperature in winter this year is higher than in previous years. It is a typical warm winter season. At present, the sea ice has been melted. The pond ice is about 15 cm to 20 cm, and the water temperature is 0.6°C~0.2°C. The sea cucumber has already appeared feeding. After entering March, the temperature rises. As the ice pool gradually melts in the breeding pond, the temperature of the water below the ice will warm up, then cool, and then warm. This process is greatly affected by changes in the outside air temperature. At this time, the incidence of disease in the pond sea cucumber culture will be Have risen. The following is an analysis and early warning of the climate in February and March and what happened in the same period in previous years, for technicians and farmers. Situation analysis In February, the temperature gradually increased. The thickness of the ice in the pond gradually decreased, and the surface of the pond's ice surface was defrosted. As a result of the wind, the swept silt covered the surface of the frozen ice, resulting in the formation of black ice, which caused the floating algae in the water to be unable to carry out photosynthesis. Dissolved oxygen decreased, water quality sediments deteriorated, and sea cucumbers were prone to swollen mouths and skins. At the beginning of March, as the temperature rises and the light cycle and intensity increase, the pond begins to melt, and the ice melting period starts from the ice inside the pond. At this time, the pond water temperature can reach 7°C~8°C, and the water temperature after melting ice drops to 3°C. At ~5°C, in case of strong winds, the temperature of the water will drop even more, which may cause damage to the sea cucumber. After the ice melts ice, a low salt water layer will form on the surface of the water layer at a depth of 20 cm to 40 cm, resulting in water stratification. Low salt water environment can induce sea cucumber skin disease. Suggested measures 1. With the melting of ice during spring, the water environment changes. Due to the longer wintering period, the nutrients in the sea cucumber are consumed more and the physical quality is weaker. In this period, it is necessary to feed palatable and nutrient-rich baits in order to enhance as soon as possible. Physical fitness, improve resistance to disease. 2. When stratification of water bodies occurs, the surface of low-salinity water layer should be promptly discharged and anti-stress drugs should be promptly put in place to improve the sea cucumber's ability to resist changes in the external environment. 3. Discharge chlorine dioxide or povidone iodine at a proper time to completely disinfect the sea cucumber pool. In addition, the sea ice in the open sea is basically frozen. The change of water quality in the offshore sea due to changes in physical and chemical indicators of the ice formation is significantly different from that in the nursery room. If blindly into the new tide, the seed will have different degrees of inability to eat, swollen mouth, and even skin, etc. Happening. It is suggested that the nursery room should be replaced with water a few days before the pool is poured. When the pool is poured, the old pool should be poured from the original pond to the new pool, and the water should be changed gently to minimize the stress response.
Corn, also known as wheat, maize, grain, it is one of the world's three major food crops, planting area and yield after rice and wheat, ranked third.More because of good mouth, high heat, large yield, and is widely used in a variety of livestock feed, thus known as the "King of Feed", in addition, corn is also the three food crops most suitable for industrial raw material crops, its processing of industrial products as high as more than 3000 kinds.
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