What are the characteristics of tomato varieties that are extremely resistant to heat and crack, and

The tomato varieties that are extremely heat-resistant and crack-resistant mainly include red and pink D-80.

Pink D-80 has strong disease resistance, likes high temperature, is more resistant to low temperature, the weight of a single fruit is about 250g, the maximum fruit weight is more than 700g under suitable conditions, the yield per mu is about 7500kg, the fruit hardness is high, the storage and transportation resistance is good, the flavor is good, the commerciality is good, and the tomato production area can be cultivated.

Stone red is extremely resistant to storage and transportation, good commerciality, disease resistance and high temperature resistance. In 2001, it won the second prize of the Municipal Science and Technology Progress Award, and can be planted in tomato producing areas across the country.

Shouguang Fuhua specializes in heat-tolerant tomato varieties - Xia Wang.

Infinite-growth type, the plant grows vigorously, the leaves are dark green, the fruit is apple-shaped, the single fruit weighs 260-280 grams, the sepals are dark and bright pink after color change, the sepals are flat and beautiful, the fruit hardness is high, the crack resistance, the storage and transportation resistance, the resistance to tomato yellowing leaf curl virus (TY), gray leaf spot, leaf mold, and root-knot nematode resistance. Spring is suitable for early spring, summer is suitable for summer, autumn is suitable for autumn extension, and winter is suitable for wintering.

Summer and autumn 36 is highly resistant to TY virus, anti-greening, anti-root-knot nematode, anti-tomato mosaic virus, strong plant growth, large number of flowers per spike, and strong continuous fruit setting ability. The fruit is tall round or slightly flattened, the fruit surface is smooth, deep pink, good brightness, good fruit set at high temperatures, high hardness, and good crack resistance. The weight of a single fruit is 250-280g, and the yield is good.

It is a medium-early maturing variety with strong resistance to stress. It is suitable for summer, autumn greenhouse and greenhouse cultivation, and can also be cultivated in late spring. When planting, pay attention to fruit thinning, leave 3-4 fruits in the first panicle, and the plant spacing is 40-45cm, which can obtain ideal tomatoes.

The Charron tomato variety is.

1) Temperature: Tomato is a thermophilic vegetable, under normal conditions, the optimal temperature for assimilation is 20 25, and the optimal soil temperature for root growth is 20 22. Increasing soil temperature can not only promote root development, but also significantly increase the content of nitrate nitrogen in the soil, accelerate growth and development, and increase yield.

2) Light: Tomato is a light-loving crop, the light saturation point is 70000lx, and the suitable light intensity of tomato is 30000 50000lx. Tomato is a short-day plant, in the process of shifting from vegetative growth to reproductive growth, the basic requirements are short-day, but the requirements are not strict, some varieties can bud and bloom in advance under short-day sunshine, and most varieties bloom earlier in the sunshine of 11 13h, and the plant grows robustly.

3) Moisture: Tomatoes need more water, but they do not need to be irrigated frequently, generally with soil moisture of 60 to 80%, air humidity of 45 to 50%. The high humidity of the air not only hinders normal pollination, but also causes serious diseases under high temperature and high humidity conditions.

4) Soil and nutrition: Tomato has less strict requirements for soil conditions, but in order to obtain high yields and promote good root development, fertile loam soil with deep soil layer, good drainage and rich in organic matter should be selected. The pH of the soil should be pH6 7, and the soil that is too acidic or too alkaline should be improved.

Tomatoes need to absorb a lot of nutrients from the soil during the growth process, according to Eteristan, for every 5000kg of fruit produced, 33kg of potassium oxide, 10kg of nitrogen, and 5kg of phosphoric acid need to be absorbed from the soil.

Tomato is a warm-loving vegetable, the most suitable temperature under normal conditions is 20-25, and tomato is also a light-loving crop!

1. Strong fruit setting ability at high temperature. High temperature in summer, small temperature difference between day and night, fast vegetative growth rate, easy to grow plants, not conducive to flower bud differentiation, not conducive to nutrient transport to the fruit, the general variety often has a large key will appear less and small, can not sit on the fruit, the fruit is small and other undesirable traits. Nongbo Powder No. 3 is resistant to high temperature, can still produce normally even under the conditions of summer protected land, the plant is stout, not easy to grow, the flower bud differentiation is less affected by high temperature, the fruit setting ability is strong, the fruit is large, the maximum can reach more than 500 grams, it is less affected by the concentration of flower hormone, the flower pedicle is small, and the deformed fruit rate is very low.

2. The fruit has high hardness, strong toughness and good taste. Tomatoes are produced in the open field in spring and summer, when it is high temperature and rainy, and the varieties with good flavor are easy to roll and crack, and the varieties that are not easy to crack the fruit have a poor taste. Nongbo Powder No. 3 not only has good hardness, strong toughness, almost no cracking, but also has a pink and gorgeous fruit color and good taste.

3. The plant has strong growth, medium and large leaves, and strong disease resistance. Nongbo Powder No. 3 has unlimited growth, balanced vegetative growth and reproductive growth, the leaves have a good protective effect on the fruit, from the influence of daily burning, the plant is not easy to premature senescence and yellowing, high resistance to viral diseases, resistance to leaf mildew, tendon rot and Verticillium wilt.

Due to the existence of unfavorable natural conditions such as high temperature and rainy summer, the off-season of vegetables in August and September in northern China is prone to occur. In recent years, vegetable farmers have taken protective measures such as shading and rain protection to create environmental conditions that are more conducive to the growth and development of tomatoes, thereby improving the yield and quality of summer tomatoes and achieving good economic benefits.

The growing period of tomato cultivated in summer is in the season of high temperature and rain, so varieties should be selected with heat resistance, disease resistance, high quality, high yield, especially the infinite growth varieties with good resistance to virus diseases.