Before the early spring grapes sprout, due to too late pruning or mechanical damage, it will make it difficult for the transmitting tissues of the branches to heal, the sap will emerge from the wound, and a large amount of nutrients will run away. Injury is light, grape production decline;…

1. Strictly choose to keep broodstock. Choose natural origin, require health, good gonadal development. More than 6Kg of weight carp, more than 10Kg of carp, more than 15Kg of carp, more than 8Kg of grass carp. The broodstock's annual turnover rate should reach about 10%.
2, scientifi…

In recent years, the unique nutrition and delicious flavor of donkey meat and the medicinal value of donkey products have attracted more and more attention. In order to increase the competitiveness in the domestic and international markets, the production of pollution-free donkeys is imper…

(1) Embryonic development of fertilized eggs Embryo development of A. sinensis eggs is greatly affected by temperature. From the fertilized eggs to the larvae, it takes about 150 hours at a water temperature of 29 to 31 °C. When water temperature is 25 to 27 °C, it takes 168. Hours or so…

1, cherry fertilization period

The cherry tree has a short growing period and has the characteristics of rapid and concentrated fertilizer application. From budding, leaf spreading, flowering, fruit development to maturity, all are concentrated from April to June. At the same time,…

Each spring is the peak period for the occurrence and prevention of pests and diseases of various crops, and it is also a time period when sprayers and other spraying instruments are used frequently. Due to its simple structure, convenient use, and low price, the hand sprayer is an importa…

Taking the SS centrifuge as an example, the four methods often used in the exhaust of the centrifuge are introduced: upper row, side row, closed type, self-discharge type, indicating that the fully enclosed centrifuge should be preferred, or the closed type should …

Function: Refrigeration and cooling specifications: 25kW~4536kW
Energy: 88 ° C ~ 150 ° C hot water, 0.1-0.8mpa steam for: hotels, hotels, apartments, hospitals, theaters, stadiums, office buildings, office buildings and other places; and textile, pha…

The benzalkonium disinfecting method uses 5% of the benzalkonium oxalate solution. When it is used, it is added with water 49 times to form a 0.1% solution and sprayed on the surface of the eggs with a sprayer. Can also be used 31 °C ~ 40 °C, 0.1% of benzalkonium bromide solution was…