Large Agricultural Circle: one-week introduction of Agricultural Science and Technology achievements (issue 4)

With the introduction of agricultural science and technology achievements in a week, this section has been highly concerned and well received by farmers. To tell you the truth, the big farmer team was just inspired at first and wanted to recommend a few things to everyone. It is really beyond our expectation that the farmers like it so much.

There is no way, this section must persist in running, and must be done well. I also hope that more friends will join us to contribute better ideas and forces to the transformation of agricultural scientific and technological achievements.

New selenium source feed additive

Selenium-enriched probiotics have the dual functions of organic selenium and probiotics, which can significantly increase the level of selenium in animal tissues, milk and eggs, improve animal production performance and improve animal reproduction; it also plays an important role in antioxidation, anti-stress, immunity and disease resistance, especially in reducing toxicity to animals and pollution to the environment.

There is a huge amount of livestock, poultry and aquaculture in China, and almost all feeds need to be supplemented with selenium.

The series of selenium-rich probiotics and other products developed and produced by this project have been widely used in Guangdong, Shandong and Shanghai, with a total aquaculture area of 1772 mu, 22590 pigs, 170000 chickens, 33500 geese and 2000 dairy cows. The total output value increased by 6.306 million yuan, net income increased by 5.1388 million yuan, and total savings totaled 1.0788 million yuan.

Industrial production and protected cultivation techniques of seedlings of Dendrobium candidum

Dendrobium candidum is a valuable traditional Chinese medicine in China, with special functions such as "strengthening yin and tonifying essence", "thickening intestines and stomach", "tonifying five internal organs and deficiency tuberculosis", "strengthening muscles and bones, warming water, tonifying kidney and tonifying years" and so on.

After years of research and exploration, the research group of Associate Professor Xiang Zengxu, Institute of traditional Chinese Medicine, School of Horticulture, Nanjing Agricultural University, has mastered the key techniques of industrial production and facility cultivation of Dendrobium candidum seedlings. as a result, the technical obstacles of low survival rate and low yield of test-tube plantlets restricted by large-scale artificial planting of Dendrobium candidum were fundamentally solved, which laid a foundation for large-scale planting and industrial development.

3WZ-700 Orchard Air-driven copying directional sprayer

According to the planting mode and development trend of modern orchard, a 3WZ-700 self-propelled orchard air-driven copying directional sprayer suitable for plant protection of dense low orchard was developed.

Effective utilization rate of pesticides: ≥ 35%, saving pesticide usage: ≥ 30%

The machine is suitable for pest control in densely planted low orchards in China. The utility model has the advantages of small turning radius, good passage and flexible operation. The direction and amount of fog flow can be determined and adjusted according to different crown height and tree type, and the fan can realize stepless speed regulation, which can produce wind transport of different intensity and realize directional low-volume and high-penetration spraying operation. it has good spraying effect and efficient operation performance. it is a new type of equipment urgently needed for orchard pest control in our country, and its application prospect is broad.

Intelligent system of High efficiency Fertilizer and Water Irrigation for Facility Agriculture

Without manual intervention, the system uses temperature and humidity sensors to measure the temperature and humidity differences at different heights, calculates crop evapotranspiration by energy balance method, and converts evapotranspiration into irrigation, which can accurately control irrigation water. it can transport water and nutrients directly to the soil near the root of crops, which has a wide application prospect in greenhouse production.

Venturi type fertilizer injection pump is used in fertilizer irrigation, which can greatly improve the utilization rate of fertilizer. Water and fertilizer are directly transported to the root soil, which can fully ensure the effective supply of nutrients and the rapid absorption of roots. Due to the uniform distribution of water and fertilizer solution in the soil, the nutrient distribution is highly uniform, and the absorption efficiency of the root system is improved. At the same time, the labor of fertilization is saved, especially for vegetables and crops planted in the greenhouse.

The system can also formulate formulations for each period according to the nutritional characteristics of crops to provide complete nutrition for crops. According to the flow rate and time of irrigation, the amount of fertilizer used per tree or unit area can be accurately calculated.

Branch grinder

In terms of the treatment technology of urban and rural abandoned branches and the key technologies of related equipment, there is a big gap between China and the developed countries. In industrial developed countries, waste branches are generally used as resources after mechanical crushing treatment. The main way to deal with waste branches is mechanical crushing.

Since 2000, on the basis of extensive investigation, domestic branch crushing equipment has been developed. A medium-sized branch grinder with 30KW power has been trial-produced in 2002, which fills the gap in this field in China. After multi-faceted investigation, the product has a large social demand and has a good market prospect.