Caring method for waterweed in Chinese mitten crab cultivating pond

Abstract

The invention discloses a caring method for waterweeds in Chinese mitten crab cultivating pond. By utilizing the principle that the waterweeds are firmly rooted in the pond and can not die because the roots of the waterweeds are taken off, the caring method can make the waterweeds can not die caused by detached roots and deficiency in nutrients in summer with high temperature and higher water level through controlling the water level and applying fertilizer. The caring method disclosed by the invention is characterized in that the growth of the waterweeds is controlled by the water level, andthe growth of the roots of the waterweed is promoted by applying a certain ratio of fertilizer, so that the caring method can make the rooting of the waterweeds firm and prevent the floating roots ofthe waterweeds from dying so as to keep the waterweed alive in the summer. In addition, the excessive waterweeds around the pond can be cut so as to ensure the sufficient supplement of the fertilizerfor the growth of the waterweeds and make the Chinese mitten crab capable of being fed easily on the bank. The caring method disclosed by the invention can care the waterweeds by controlling the water level and reasonably applying the fertilizer so as to make the waterweeds alive in summer and all the other seasons, improve the water quality, and reduce the negative effects of high temperature insummer to the growth of the Chinese mitten crabs, thereby providing the basis for ecologically and efficiently cultivating Chinese mitten crabs.

Description

technical field [0001] The invention relates to the technical field of agricultural water quality control, and particularly relates to a method for maintaining Elodea in a breeding pond for mitten crabs. Background technique [0002] Elodea is native to the Americas and is a high-quality, fast-growing, high-yielding submerged plant. This aquatic plant has the characteristics of early germination, fast growth, low temperature resistance, etc. Elodea is rich in nutrients and is an excellent natural bait for river crabs. In the cultivation of river crabs, people take advantage of its characteristics and often use it as a grass for raising crabs. The purpose is that, on the one hand, planting Elodea in crab ponds can purify water quality and prevent water eutrophication; Faster growth can reduce the mortality of river crabs. However, due to the strong reproductive ability of Elodea and the poor palatability of river crabs, it is easy to cause crazy growth, affect the activiti...

AI Technical Summary

Problems solved by technology

This method is very harmful to river crabs. When cutting aquatic plants, it is easy to stir the pool water and drive rotten grass roots. Under high temperature, the water quality is easy to deteriorate and cause the death of river crabs. When the Elode algae has been fished out, the river crabs are often hidden in the Elode algae during the day. It is easy to cause manslaughter; 2. Manually fish out excess Elodea and raise the water level so that the head of Elodea submerges below 30cm of the water surface

Because the root system of Elodea is not firmly rooted and not resistant to high temperature, this method of directly raising the water level will cause a large area of ​​floating roots of Elodea to rot and die under high temperature conditions, which will rapidly deteriorate the water quality and cause the death of river crabs; in addition, Artificially operating in crab ponds for a long time will affect the normal habitat and molting growth of river crabs, which will inevitably have an adverse effect on the size of the crabs that will grow in the future

Therefore these two kinds of methods of preventing Elodea from growing wildly and floating roots from dying in the summer high temperature season all have relatively large defects, which are not only time-consuming and laborious, but also unfavorable for the growth of river crabs, which to a large extent restricts the growth of river crabs and the growth of river crabs. output