“98% of plant growth regulators are low-toxic or slightly toxic.†On May 29, at the national plant growth regulator development and application exchange meeting held in Chengdu, Zhang Wenjun, director of the laboratory of the pesticide testing institute of the Ministry of Agriculture, targeted the current society. Some prejudice about the existence of plant growth regulators, put forward their own views.
In recent years, plant growth regulators have continuously entered the public's field of vision, and the phenomenon of excessive use of swelling agents and sweeteners has been disclosed successively, which has caused ordinary citizens to smell. Jia Chunhong, a researcher at the Beijing Academy of Agricultural Sciences, believes that the cause of this embarrassment, in addition to the excessive hype of some foreign media, the industry itself should also be self-examination.
Jia Chunhong said that there are many problems in the process of using regulators, such as the period of inattention, the inappropriate dose concentration, and the unreasonable mixing. Some farmers even use fertilizers instead of fertilizers, resulting in insufficient nutrients and premature senescence of plants. Yield and quality, and even residue.
"In fact, plant growth regulators are not the same as pesticides and fertilizers. There is no possibility of mutual substitution." Ye Jiming, deputy director of the Ministry of Agriculture's Pesticide Testing Institute, said that the regulator itself has irreplaceable advantages: First, the use of targeted, strong Crops have the function of promoting and inhibiting; secondly, they are widely used in various crops such as grain, cotton, fruit trees and vegetables; thirdly, they are used in a small amount, and most of them need only be sprayed once every specified time.
Zhang Wenjun said that the biggest advantage of plant growth regulators is their safety. He introduced that as of May this year, among the 463 plant growth regulator preparations registered by the Ministry of Agriculture, environmentally friendly dosage forms (including water, soluble powder, wettable powder) accounted for 2/3, low-toxic or slightly toxic preparations. It is 98%, and plant growth regulators are much less toxic than other pesticides such as pesticides and herbicides.
However, some manufacturers have strict technical requirements, resulting in uneven plant growth regulator products. Yan Changxu, chairman of Sichuan Guoguang Agrochemical Co., Ltd. said that many manufacturers add ingredients at will, and the technical guidance for farmers is not in place. "Some regulators generally only need to spray one season crop according to the specified time, but some manufacturers want to promote products. Tell the farmers to fight once and for three or five days like foliar fertilizer, causing product abuse and even residue."
At the same time, domestic plant growth regulators are also facing the problem of aging varieties. Tan Weiming, an associate professor of agronomy at China Agricultural University, pointed out that the 35 registered varieties with the highest sales volume were all developed before the 1990s, but there are more imitation products and fewer self-created products. “The existing R&D of enterprises is relatively weak, and intellectual property rights. The problems of poor protection and low counterfeiting cost are restricting the development of plant growth regulators in China."
Many participating manufacturers said that in order to solve these problems in the industry, they must standardize management, strictly control the product registration, and strengthen training for farmers to guide them to use plant growth regulators correctly.
OTIS Elevator Spare Parts, OTIS Elevator Parts
XiziOTIS Elevator Spare Parts, XiziOTIS Elevator Parts
Otis is the world's largest manufacturer and maintainer of people-moving products, including elevators, escalators and moving walkways. Founded more than 160 years ago by the inventor of the safety elevator, Otis offers products and services through its companies in more than 200 countries and territories, and maintains approximately 1.9 million elevators and escalators worldwide. Otis is a unit of United Technologies Corp., a leading provider to the aerospace and building systems industries worldwide
| People | Nearly 66,000 employees globally with approximately 1,000 branch offices |
| Revenue | $12 billion in 2015 |
| Installed Base |
Approximately 2.6 million Otis® elevators and escalators in operation worldwide |
| Service Base | Approximately 1.9 million elevators and escalators serviced by Otis worldwide |
| Countries | Products sold and serviced in more than 200 countries and territories |
| Manufacturing | Major manufacturing facilities on four continents |
| Engineering and Test Centers |
Otis has a network of research and engineering facilities and test towers around the world Company's two tallest elevator test towers are located in Shibayama, Japan (505 feet or 154 meters above ground; 89 feet or 27 meters below ground) and Bristol, Conn., United States (384 feet or 117 meters above ground) |
OTIS Elevator Spare Parts,OTIS Elevator Parts
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjelevatordoorsystem.com