General situation and special introduction of fishery development in China
fishery is an important part of China's large-scale agriculture. Aquaculture in China has achieved unprecedented development since the reform and opening up.
It has become the largest farming country in the world and an important growth point in the economic development of large agriculture. Since the beginning of the 21st century, aquaculture in China has maintained a strong development trend. It has made outstanding contributions to the prosperity of rural economy, the expansion of employment population, the improvement of people's quality of life and the solution of the problems of agriculture, rural areas and farmers. At the same time, it has also made outstanding contributions to the sustainable utilization of marine and freshwater fishery resources and ensuring "food security" in China.
It plays an important role.
The picture shows: fishery and aquatic products
in recent years, the scientific research achievements of aquaculture in China are outstanding.
The simultaneous improvement of theory and technology provides a strong support for the technological progress and industrial development of aquaculture. However, with the rapid development of aquaculture, it has also brought a series of new problems, such as disease epidemic, germplasm degradation, water pollution and the decline of aquaculture efficiency, worrying product quality and safety, and so on.
Coupled with the continuous impact of technical barriers in the international aquatic products trade market, the sustainable development of China's aquaculture industry is facing unprecedented challenges.
science and technology is the primary productive force. In order to promote industrial development and increase the income of fishermen and farmers, we must popularize and popularize new scientific and technological achievements, introduce, digest and absorb foreign advanced technology and experience, so as to facilitate the continuous improvement of the scientific and technological level before, during and after production. The publication of agricultural science and technology books bears the social responsibility of popularizing agricultural scientific and technological knowledge and promoting the transformation of achievements into productive forces. It is the mentor and good friend of fishermen. It can guide the breeders to solve the practical problems in production.
It can also provide consumers with the basic knowledge of healthy aquaculture, so as to strengthen the communication and understanding between producers and consumers. For this reason, the author compiles a series of topics on aquaculture for reference and exchange for the majority of professional readers.
The content of this topic of has two main features:
First of all, has an obvious sense of the times. In view of the needs of the broad masses of farmers, to solve the current problems in production, and to introduce the new healthy breeding technologies of the most promising new breeds and existing leading varieties, in order to improve the level of the whole industry.
Second, is forward-looking. Efforts should be made to publicize to the people in the industry the new concepts, technologies and models of "quality and safety" and "speeding up the transformation of the mode of economic growth" under the guidance of the scientific concept of development, so as to promote industrialization and standardized production management. at the same time, in order to meet the general direction of modern agricultural construction, popularize land-based closed circulating aquaculture, sea-based facility fishery, artificial reefs, grazing aquaculture and other models. Make every effort to promote the construction of modern aquaculture fishery in our country. This series of books includes an introduction to the main breeding varieties,
The biological and ecological characteristics of new varieties, artificial propagation, seedling cultivation, culture management, nutrition and feed, water quality control, disease prevention, breeding system engineering, processing and transportation, etc. The publishing house strives to grasp the scientific nature, practicality and maneuverability of the series of books. In line with the purpose of "making the fishery and farmers understand, use and retain", the publishing house adopts the form of both pictures and texts, and the sentences are profound and easy to understand. some technical processes have also added operational examples.
So that friends in the industry can easily read and understand, aquaculture series of topics is the gospel of aquaculture industry, we hope that it can become a bosom friend of the industry and a good helper for science and technology to get rich!
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Introduction of main walnut germplasm resources in China
Walnut, in China, there are walnut, Qiang peach, longevity and other aliases, abroad known as Persian walnut, British walnut or European walnut, is an important nut tree species in the world. The picture shows that walnut belongs to the genus Walnut of Walnut family, of which there are about 10 species with cultivation value.
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Current problems of Walnut Industry in China
The varieties are mixed, the commodity consistency is poor, the varieties are ignored in some places, the good and the bad are intermingled, lack of reasonable planning and design, and fail to build a scientific and regional garden, resulting in poor site conditions, improper selection of varieties and poor quality of seedlings. Historically, due to
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