Avoid base fertilizer spring application. In the end of February to the beginning of March, the basal fertilizer is applied to grapes, so that the grape roots are not easy to heal after being cut off, and the water and nutrient supply to the plants are greatly affected.
The best application period of basal fertilizer should be carried out after grapes are harvested, and it should be sooner rather than later. Early application can quickly restore tree vigor, which is conducive to grape winter overwintering and leap year growth results.
Avoid first hit Wang shoot. In addition to fixing the new shoots, the effect of the new shoots and bindings allows the new shoots to be distributed reasonably, ensuring that there is sufficient light, and also promoting the growth of new shoots. Therefore, if you first tie up Wang Wang can only make Wang shooter, shooter grow more prosperous, more adverse control on the future, on the contrary, so that weak shoots grow even weaker.
The correct method of operation should be: first to tie the weak tip in order to promote the growth of weak shoots, so that the growth of Wang shooter and shooter shoots is inhibited, and eventually achieve the same purpose with the growth of new shoots.
Avoid high temperature, long drought irrigation ground is not sterilized. After July each year, high temperature and dry weather often occur. At this time, the orchards are filled with water. If the ground is not sterilized, the hot gases generated by the high-temperature and dry ground will transpire, and the high-temperature type disease that causes winter-overworn ground-white rot bacteria will rise with the hot gas transpiration. On the ear, the ear is susceptible to disease.
Avoid overloading fruit. When the amount of fruit on the grapes is generally high, overload production will delay the maturity of the fruit, reduce the quality, and affect the value of the product. Moreover, it will cause the nutrient consumption of the tree reserve to be too large, affect the flower bud differentiation of the grape in the following year, and make the amount of the grape in the second year small and small, thus causing the result of unstable grape yield and low quality. Therefore, the output should be strictly controlled.
Avoid low results. Grapes are generally about 30 cm away from the ground. It is necessary to properly increase the resulting parts of the grapes. When the rainfall is heavy and the rain is heavy, grape pests and diseases occur seriously. In particular, the lower ear of the grape not only has an early onset but also has a large number of diseases, and the occurrence of the disease on the soil is more serious. By binding, the result area can be effectively increased to more than 70 cm above the ground.
The advantage of plastic centrifuge tubes is that they are transparent or translucent, their hardness is small, and samples can be taken out by puncture. The disadvantage is that it is easy to deform, has poor corrosion resistance to organic solvents, and has a short service life.
Plastic centrifuge tubes have caps, which are used to prevent sample leakage, especially when used for radioactive or highly corrosive samples. It is very important to prevent sample leakage; the tube cap also has a function to prevent sample volatilization. And support the centrifuge tube to prevent deformation of the centrifuge tube. When choosing this point, you should also pay attention to check whether the tube cover is tight, and whether it can be tightly covered during the test, so as to achieve the inversion without leakage;
We all know that in plastic centrifuge tubes, the commonly used materials are polyethylene (PE), polycarbonate (PC), polypropylene (PP), etc. Among them, polypropylene PP tubes have relatively good performance. Therefore, we are choosing plastic centrifuges. Whenever possible, consider polypropylene plastic centrifuge tubes.
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