Now, there are many kinds of tomatoes. How to choose the right variety? First of all, we must look at the market demand to see what kind of good sales, including the shape of tomatoes, color, hardness and so on. Second, we must buy the seeds of national scientific research institutes and qualified large-scale manufacturers. Third, it is necessary to choose the appropriate variety according to different mouthwashes. Sponge Test,Swab Collection Kit,Vtm Swab,Cotton Swab Jiangsu HXRT MD Co.,Ltd , https://www.jshxrtmed.com
Cold tomatoes in early spring: The first choice is the word “earlyâ€, which is the tomato morning market, which sells for a good price. How can this "early" be done? Some people say: I planted early, but planting in early spring is limited by temperature. It is too early and the planting temperature is not successful. Therefore, we must choose early maturing varieties. Tomatoes have seven leaves and fruit set, and there are nine leaves and fruit set. We choose the seven leaves to sit and fruit. If the same day sowing seven leaves and setting fruit is 10-15 days longer than the nine leaves of the morning fruit set, we should choose the seven leaves and fruit set. Early maturing varieties. In addition, we choose varieties with short fruit development period. In normal years, tomatoes have 40 days from flowering to maturity, and there are 50 days. We choose 40-day mature varieties. Some people also said: This species is big and the yield is high. In fact, in early spring, cold tomato tomatoes have 4 ear fruits per plant, and the average yield is between 75,000 and 110 thousand kilograms per kilogram. Big breeds are usually late-maturing, if the ripening is too late, the price of tomatoes is too high. Low, more than a few pounds to harvest often do not sell more money.
Tomatoes in Summer: Summer tomatoes are generally cultivated in May. When the tomatoes are marketed, they are exposed to high temperatures and rainy seasons. The tomatoes in the open field are often cracked and the disease is heavy. The fruit color and quality are not as good as the tomatoes produced in greenhouses. This mouthful of tomato flowering and fruiting takes place on a treacherous day and the temperature can reach 40°C, so choose a heat-resistant variety. When buying seeds, the manufacturers said: This breed has good heat resistance, and how high the temperature is, no one manufacturer will tell you the exact temperature, because heat resistance itself is a vague concept. The normal growth temperature of tomato is 25°C-30°C. If it exceeds 30°C for a long time, the flower development of the tomato is not normal, forming malformed flowers and producing malformed fruit. The pollen of the more than 35°C is soon aborted. Therefore, no species is genuine. Heat resistant varieties, which are determined by the characteristics of the tomato. For the high temperature in the summer, physical protection measures can be taken to reduce the temperature, and the varieties of strong, leafy, anti-japanese yam are selected to increase the quality of fruits.
Autumn delayed tomato: The tomato is generally sown in June. Since the disease of the yellow leaf curl virus in 2009, many vegetable farmers have been afraid to grow autumn tomatoes. Yellow leaf curl virus disease caused no yield, and after three years of trial planting, the best method to prevent and cure yellow leaf curl leaf virus disease is to select the tomato varieties resistant to the yellow leaf curl virus. When it comes to anti-yellow leaf curl virus varieties, many people believe that foreign varieties are better than domestic varieties because the hardness is higher than that of domestic seeds, and high-hardness varieties are suitable for export use. If they are sold domestically, they are still good for domestic varieties. For example, Zhejiang Academy of Agricultural Sciences vegetable anti-yellow leaf curl virus strain Zhefen 702, has been planted for three years, has been performing well. In addition, many foreign varieties require sowing after July. The first reason is that the heat resistance is poor. In addition, tomato fruit has a long period of development. If the autumn is delayed, the fruit development period will be long and the temperature will be affected by the fall in autumn. The low rate of commodity, coupled with expensive seeds, has poor efficiency.
Autumn delay in the cultivation of greenhouses, choose domestic and imported seeds can be, because precocious, late maturity does not matter, are the off-season supply of tomatoes.