Tomatoes grown by retail investors can taste and be juiced, but why are they always not red?

Tomato planting area is very extensive, basically free from geographical restrictions, so a variety of varieties were born. Therefore, when buying seeds, don't buy them blindly. It's best to go to a regular seed shop. You can't buy another one at street vendors or rural markets. If the fruit is swollen, immature and not red, it may be lack of light. In this case, you can pick the old leaves below, which can increase ventilation and light transmission and accelerate fruit ripening.

In fact, it takes a long time for tomatoes to turn red naturally from flowering to maturity, and it takes about a month. However, some growers' tomatoes turn red earlier. Needless to say, everyone knows that our own tomatoes are not red because of insufficient light. Sheds can be opened during the day on sunny days and electric lights can be used at night on rainy days. Under the action of light quantum, chlorophyll (green) in tomato can be converted into anthocyanin molecule (red).

Planting density. In the process of planting tomatoes, we will find that tomatoes with too small nest spacing and row spacing will mature slowly. Because the density is too high, the spacing between tomato seedlings is too small, which seriously affects its ventilation and light transmission. First, when planting, control the spacing between plants to ensure that tomatoes have a large growth space; The second is proper pruning. Why do you pick ripe tomatoes every day? You are worried that the uneven distribution of nutrients will affect the growth of other fruits.

Lycopene is needed for tomato color change, but too high or too low temperature is not conducive to the production of lycopene. The optimum temperature of lycopene is 24℃, which affects the production of lycopene and hinders the rational fertilization when tomatoes turn red: organic fertilizer is the main base fertilizer, and various nutrient elements are reasonably matched. When topdressing potassium fertilizer promotes the swelling and coloring of tomato fruit, it should be used before the color change stage, because it takes a certain time for potassium fertilizer to be absorbed and utilized by plants after it is applied to soil.