Every three to five months of the year is the peak period of pesticide use. Various pesticide products in the pesticide market are competing. Although many foliar fertilizers and plant growth regulators on the market are nominally cold-resistant, the market reaction is generally cold.
“In the citrus region, it is difficult to find a fruit grower that uses foliar fertilizer and plant growth regulators to cope with low temperatures.†Wang Wenfeng, director of the Agricultural Resources Department of the Foan County Minansha Sugar Association, said that the farmers The understanding of foliar fertilizer and plant growth regulator function is limited to some functions such as yellowing to green, and it is not cold for most of the foliar fertilizer and the cold resistance function written on the regulator package.
The same is true in some vegetable producing areas. For the reduction of vegetables caused by low temperature in the previous period, Sujiajian, a grower of Gaozhou Beiyun cuisine, said that he was helpless. He said that he relied on traditional irrigation and early fertilization for cold resistance, but the effect was not satisfactory. However, he still said that he did not trust the products on the market that had the effect of "cold resistance".
Mo Guoyong, an agronomist at Borofutian Senko Agricultural Resources Management Department, believes that many farmers have the concept that these products are crop health products, mainly through nutritional supplements to enhance the crop's own resistance, the effect is not obvious, Therefore, it is difficult to be accepted by farmers only by relying on cold resistance.
It is reported that the current cold-resistant products on the market are mainly based on foliar fertilizer and growth regulators . He Ronghua, technical director of South China University of Yunda Technology Co., Ltd., said that there are currently 30 kinds of products with cold-resistant effects, and the quality and effect are uneven, which causes most farmers to be biased against these two types of products.
Moreover, many manufacturers claim that they have developed new active ingredients, which are all of the same type. Zeng Qingyu, head of the Guangzhou office of Zhejiang Huangjia Biochemical Co., Ltd., said that the ingredients of these products are not as complicated as the publicity. However, the overwhelming information has indeed disturbed the audio-visual of the farmers. Because of the lack of heart, the instinct has alienated such products.
Zeng Qingxuan also said that many manufacturers exaggerated the functions of the products, which led to market confusion, which also made many farmers disappointed with the cold resistance of foliar fertilizer and plant growth regulators.
What is the effect of these cold-resistant products? According to industry insiders, foliar fertilizers and plant growth regulators have been effective in Zengcheng's potato and Qingyuan fruit trees, reducing farmers' losses, but the market recognition in other parts of Guangdong is not high.
Jiangsu Longlight Chemical Co., Ltd. is responsible for the Guangdong regional Huang Honghui to the Southern Rural News reporter, the need to rationally treat the cold resistance of these products. In general, foliar fertilizers and plant growth regulators are used below 0 ° C or for a period of more than one week, and their cold resistance is compromised.
He Ronghua believes that these products should pay attention to the use of methods in order to play the most important role of cold resistance. For example, plant growth regulators are generally used once a week before the onset of the cold wave, and can be used in conjunction with common foliar fertilizers; together with low concentrations of gibberellin (generally no more than 5 ppm) can be used in continuous low temperature weather. Maintain a certain growth; the concentration of vegetable foliar fertilizer needs special attention. In the western Guangdong area where the accumulated temperature is high in general, low concentration should be applied. In northern Guangdong, higher concentration can be used. When the wind is dry, low concentration is used, and the foggy weather should be added. Large concentration.
Chen Qiongxian, director of the Vegetable Cultivation Research Office of the Vegetable Research Institute of the Guangdong Academy of Agricultural Sciences, and Chen Qiongxian, an expert in vegetable cultivation and nutrition at the Vegetable Innovation Team of Guangdong Modern Agriculture Industry System, believes that combating low temperature is a difficult problem in the cultivation process and should be comprehensively managed. One week before the onset of the cold wave, ditching and irrigating, increasing the application of phosphorus and potassium fertilizers, not applying nitrogen fertilizer, and rationally matching the effects of foliar fertilizer and plant growth regulators, the fire can be produced in Tiantou in the cold wave, the effect is better.
Flexible rubber soft joint is also called rubber joint, rubber flexible joint, soft joint, shock absorber, pipeline shock absorber, shock absorber throat, etc. It is a kind of high elasticity, high air tightness, medium resistance and weather resistance. The pipe joint is a hollow rubber product that acts as a flexible connection between metal pipes
Rubber soft joint products utilize the advantages of rubber's elasticity, high air tightness, medium resistance, weather resistance and radiation resistance. High pressure, high temperature mold vulcanization. It has high internal density, can withstand high pressure, and has good elastic deformation effect. Shock absorption, noise reduction, lightweight, non-toxic.
According to the shape, it is divided into: concentric and same diameter, concentric reducer, eccentric reducer.
According to the structure, it is divided into: single sphere, double sphere, elbow sphere.
According to the connection form, it is divided into: flange connection, threaded connection, threaded pipe flange connection.
Flange for connecting rubber joint: DIN BS ANSI JIS standard
Working pressure: 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa
Working temperature: -40 degrees to 80 degrees (also can process high temperature resistant rubber soft joints)
Material of main parts
Ball body: natural rubber, neoprene, butyl rubber, nitrile rubber, fluorine rubber, EPDM
Inner and outer lining: natural rubber, neoprene, butyl rubber, nitrile rubber, fluororubber, EPDM, PTFE
Main frame: Nylon cord
Booster ring: multi-strand copper-plated steel wire
Flanges: Cast, Forged Carbon Steel (Q235), Stainless Steel (201, 304, 316, 321), Plastic (PVC, PPC)
The flexible rubber soft joint solves the problem of different diameters when connecting metal pipes, and also has the effect of shock absorption and noise reduction, which can save pipe installation parts and save costs. It has the characteristics of high pressure resistance, good elasticity, large displacement, balanced pipeline deviation, vibration absorption, good noise reduction effect, and convenient installation. It is used in connection with pumps and Valves, pipelines with large vibration, and pipelines with frequent changes in cold and heat.
Rubber soft joint products have high pressure resistance, good elasticity (axial and lateral angular displacement), noise reduction, light weight, shock absorption, easy installation, flexible use, easy replacement and maintenance, and have acid resistance, alkali resistance, oil resistance, etc. Features.
Can be widely used in water supply and drainage, circulating water, HVAC, fire protection, papermaking, pharmaceuticals, petrochemicals, ships, pumps, compressors, fans and other pipeline systems. The ordinary type is used to transport air, compressed air, water, seawater, oil, acid, alkali, etc. at -15℃~120℃. The special type is used to transport the above-mentioned medium or oil, concentrated acid and alkali, and solid materials above -30℃~250℃.
Applicable media: sea water, fresh water, hot and cold water, drinking water, domestic sewage, crude oil, fuel oil, lubricating oil, refined oil, air, gas, steam and granular powder.
The normal applicable medium for flexible rubber joints is ordinary water with a temperature of 0-60 °C. For special media such as oil, acid and alkali, high temperature and other corrosive and hard textures, the corresponding special-resistant material rubber joints should be selected. , and cannot be used blindly or generically.
When using or storing the flexible rubber joint, avoid high temperature, ozone, oil and acid-base environment. A sunshade frame should be built for pipes used outdoors or facing the sun and wind, and it is strictly forbidden to expose to the sun, rain, and wind erosion. The surface of the joint is strictly prohibited to be painted and wrapped with thermal insulation materials. Due to the aging problem of rubber products, it should be checked and replaced in time.
Rubber Joint,Expansion Rubber Joint,Rubber Joint Pipe,Flexible Rubber Joint Flange
Inner Mongolia Overseas.Trade co.,LTD , https://www.flangevalvejoint.com