Weekly Agricultural Science and Technology Achievement Recommendations (Great Agriculture Circle Issue 4)

Weekly Agricultural Science and Technology Achievement Recommendations - this section has received great attention and enthusiastic praise from farming friends. To be honest, the Great Agriculture team initially just had a flash of inspiration and thought we would recommend a few items and be done with it. That farming friends like it so much truly exceeded our expectations.

There is no other way - this section must keep going, and it must be done well. We also hope more friends will join in and contribute better ideas and strength to the transformation of agricultural science and technology achievements.

Selenium-enriched probiotics have the dual effects of organic selenium and probiotics, and can significantly increase selenium levels in animal tissues, milk and eggs, improve animal production performance, and improve animal reproduction; they also play an important role in antioxidant activity, stress resistance, and improving immunity and disease resistance; in particular, they can significantly reduce toxicity to animals and pollution to the environment.

China has a huge scale of livestock, poultry and aquaculture farming, and almost all feed needs added selenium.

The series of products such as Selenium-Enriched Yishengbao developed and produced by this project have been promoted and used in Guangdong, Shandong and Shanghai and other places for more than 80 tons, cumulatively applied to an aquaculture area of 1772 mu, 22590 pigs, 170000 chickens, 33500 geese, and 2000 dairy cows. Newly added total output value was 6.306 million yuan, newly added net income was 5.1388 million yuan, and total cost savings were 1.0788 million yuan.

Dendrobium officinale is a traditional precious Chinese medicinal herb in China, with special effects such as "strengthening yin and benefiting essence," "nourishing the stomach and intestines," "tonifying the five viscera and consumptive diseases," and "strengthening tendons and bones, warming the water organ, tonifying the kidney and boosting strength, and lightening the body to prolong life." Through the ages it has been a fine product for nourishing yin and strengthening the body, and has long been known as "thousand-gold grass" and "soft gold."

After years of research and exploration, the research group of Associate Professor Xiang Zengxu at the Institute of Chinese Medicinal Materials, College of Horticulture, Nanjing Agricultural University, has now mastered the key technologies for the industrialized production of Dendrobium officinale seedlings and facility cultivation, fundamentally solving the technical obstacles that restricted large-scale artificial planting of Dendrobium officinale, namely the low survival rate of transplanted test-tube seedlings and low yield, and laying the foundation for large-scale planting and industrialized development.

According to the planting patterns and development trends of modern orchards, a 3WZ-700 self-propelled air-assisted profile-tracing directional orchard sprayer suitable for plant protection operations in densely planted low orchards was developed.

Effective pesticide utilization rate: >=35%, pesticide use reduction: >=30%

This machine is suitable for pest and disease control operations in China's densely planted low orchards. It has a small turning radius, good passability, and flexible operation. According to different canopy heights and tree shapes, the fog flow direction and spray volume can be determined and adjusted, and the fan achieves stepless speed regulation, which can produce air delivery of different intensities, realizing directional low-volume high-penetration spray operations, with good spraying results and efficient operation performance. It is a new type of equipment urgently needed for orchard pest and disease control in China, with broad application prospects.

This system requires no manual intervention. It uses temperature and humidity sensors to measure the temperature and humidity differences at different heights, uses the energy balance method to calculate crop evapotranspiration, and converts evapotranspiration into irrigation volume, enabling relatively precise control of irrigation amount and delivering water and nutrients directly to the soil near the crop roots. It has broad application prospects in greenhouse production.

Fertilizer irrigation adopts a Venturi-type fertilizer injection pump, which can greatly improve fertilizer utilization. Water and fertilizer are delivered directly to the root-zone soil, fully ensuring the effective supply of nutrients and rapid absorption by the root system. Because the water-fertilizer solution is evenly distributed in the soil, nutrient distribution is highly uniform, improving the absorption efficiency of the root system. At the same time, it saves fertilization labor, especially for vegetables and crops planted in greenhouses.

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

In the treatment technology of urban and rural discarded branches and the key technologies of related equipment, China still has a relatively large gap with industrialized developed countries. In industrialized developed countries, discarded branches are generally mechanically crushed and then comprehensively utilized as resources. The main method of treating discarded branches is mechanical crushing.

Since 2000, on the basis of extensive investigation, the development of domestically produced branch crushing equipment began. In 2002, a medium-sized branch crusher with a power of 30KW was trial-produced, filling the domestic gap in this area. After investigation from multiple aspects, this product is in great social demand and has good market prospects.