In the course of operation of agricultural machinery, if a mechanical failure occurs, light traffic accidents result, people are injured, vehicles are damaged, and heavy vehicles are destroyed. How to predict the failure of the tractor to avoid accidents?
The breeding industry is one of China's high-quality and highly-efficient special aquaculture industries. Since its development in the late 1970s and early 1970s, the current annual output has reached more than 100,000 tons, ranking first in the world. Although the current market price of commodities is low, market sales still remain. However, in the future, in order to achieve sustainable and healthy development, we must also look for new breeding models and the best ways to do so.
According to the author's many years of investigation and research and breeding practices, the use of existing breeding ponds for polyculture is the best way for our country to develop healthy rearing. There are three basics:
A good: the pond environment is easy to manage
Due to the large pond area, deep water, and natural climate conditions in the wild, the aquaculture environment is better than industrialized greenhouses and small cement ponds. In terms of management, in addition to preventing fish flies, stocking, and fishing, other management can be carried out according to the original breeding objects in the pond. There are also many ways to raise polyculture in ponds, such as fish gills, fish gills, shrimp gizzards, and crab polyculture.
Two good: low cost and good efficiency
Due to the use of existing ponds for polyculture, the large amount of funds for the construction of Dianchi Lake and the annual depreciation of equipment can be saved. In particular, the stocking densities of the polyculture ponds are based on the amount of natural food in the ponds. Therefore, most of them can be stocked or unstocked. This will reduce the cost of farming by more than half than conventional breeding. The maggots that are raised in ponds are naturally eaten because of their strong vitality. For example, in Tongxiang City, Zhejiang Province, the use of shrimp ponds to cultivating a variety of river scapes in South China, not only improves the efficiency of the mulberry by several times than that of a single cultivar, but also results in a better quality of prawn and alfalfa than in a single cultivar. This is highly welcomed by local consumers.
Miyoshi: Improve the utilization of ponds and save land
After the reform and opening up, due to construction needs, land resources have become increasingly scarce, especially in developed coastal regions, where land resources are expensive. Therefore, the use of mixed ponds in existing ponds can not only increase the utilization of ponds, but also save a lot of valuable land. In China, the number of ponds that can be used for polyculture is several million mu. If 100 acres per mu are used, it can save hundreds of thousands of mu of land, which is of great significance.
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