Sambucus buergeriana Blnme ex Nakai (Sambucus buergeriana Blnme ex Nakai). Alias ​​Ma Wei Sao, continued bone wood, fair old and so on. Widely distributed in the northeastern forest areas, Russia, North Korea, Japan, Mongolia also have distribution.
1 Process selection of ra.......

Air clean technology is a technology that creates a clean air environment. The application of air cleaning technology has appeared in the "control assembly area" of aerospace instruments, and has gradually expanded to apply to precision processing products, painting, large-scale integ.......

Begonia is a large-scale edible jellyfish with very high economic value. It depends mainly on planktonic foods in natural water for food, and should not be used as an intensive culture. Therefore, there are unique key technologies in the breeding process. ?
1 seed selection?
It is be.......

Ducks are for economic benefit, and for summer ducks are both unfavorable for growth and control of unfavorable diseases. In the summer, good ducks need to be cultivated to adjust feed formulations, reduce density, change the environment, and strengthen management. The specific work is as foll.......

Many farmers have found that the conception rate of sows in the summer is low, which affects the production efficiency. To solve this problem, we must first understand the root cause. In general, there are four main reasons.
First, the ambient temperature is too high The boar semen's .......

A vegetable farmer in Pingdu City asked, “What kind of rootstock is selected for grafted eggplant?”
The main stocks for grafted eggplant are: Tolu Bamweet, Totos Garga, and crp.
Nowadays, grafting is commonly used. Specific requirements: In order to make the optimum graft.......

First, the mating preparation period (purpose: to improve the sow body condition, so that the normal estrus of the sows, the discharge of quality assurance of sperm, so that timely breeding, improve the emotional period of pregnancy rate and the number of embryos conceived.)
(1) 800-1.......

(1. Taigu County Animal Husbandry Center of Shanxi Province, Taigu 030800, Shanxi, China; 2. College of Animal Science and Technology, Shanxi Agricultural University, Taiyuan 030801, Shanxi, China)
Deer can obtain higher economic benefits, and it is also an effective way for farmers to sh.......

In the early 1980s, with the development of China's economy, meat processing ent.......

Danish scientists changed the gene of Arabidopsis thaliana to make it a "pointer" for mine detection. If there is a mine in the nearby soil, the transgenic plant will change from green to red. With the help of aircraft inspections, this color change can be observed without risk, thus.......