What are the control methods for uneven eggplant color change?
Everyone has surely eaten a lot of eggplant. Most eggplant varieties are dark blue in color, and eggplant has a very good taste and texture. Its market demand is also relatively large, and quite a few people grow it. However, many farmer friends find when growing it that sometimes the color of the eggplant is uneven, with one patch green and one patch black. Although there is no difference in taste, it seriously affects the appearance. So how should we prevent and control this uneven color change? Let's take a look below!
1. Planting density
Reasonable planting density is the key to ensuring good eggplant growth, because eggplant has a relatively large demand for light, and since eggplant leaves are large, thick and fleshy, its light demand is even greater. Moreover, most eggplant is now grown in greenhouses, where the light duration is relatively short, so we must control the planting density well so that every plant has sufficient light and the eggplant can successfully color up during the color-change period.
2. Rational pruning
This is actually much the same as the planting density above. Removing useless branches such as leggy branches, overly dense branches, and weak-growing branches can enhance the air and light penetration of the eggplant field. This makes the growing environment for the eggplant better and allows the plants to receive light evenly. During the color-change period, eggplant has a relatively large demand for light, and ensuring sufficient light is the key to successful coloring.
3. Timely leaf removal
Eggplant is a multi-growth plant, and long-term growth inevitably leads to leaf aging and yellowing. At this time, we should promptly remove these leaves that are of no benefit to plant growth. This is because these leaves not only cannot bloom and bear fruit and carry out photosynthesis to accumulate nutrients, but also affect the air and light penetration of the eggplant field, hindering plant growth. So old leaves and yellow leaves should be removed in time, and also the weeds in the field, as weeds cause the same harm to the plants.
4. Regulating temperature
The growing temperature of eggplant is also key to coloring, and its importance is the same as that of light. During the color-change period, the most suitable temperature for eggplant is around 24 degrees, so we should control the surrounding temperature well and make timely adjustments. Eggplant has different temperature requirements at each growth stage. During the fruiting period, the most suitable temperature during the day is around 28 degrees, while at night it should be lowered by 8-10 degrees.
5. Controlling nitrogen fertilizer
Nitrogen fertilizer is the fertilizer farmers like to apply most, but they do not pay attention to the amount, and excessive nitrogen fertilizer can easily cause eggplant to become leggy. This leads to reduced fruit nutrition and hindered coloring. In the later stage of eggplant growth, especially during the color-change period, the application of nitrogen fertilizer must be reduced. If the growth rate slows down, foliar fertilizer can be sprayed appropriately, and when uneven color change is found, potassium sulfate can be used to promote coloring.
The above are the methods for preventing and controlling uneven eggplant color change. In fact, everyone should have noticed that most of the reasons affecting uneven eggplant color change are due to light. Therefore, we can specifically start with light, increase the light duration and intensity in the eggplant field, enhance the air and light penetration of the field, so that every plant can receive light evenly, promote eggplant coloring, improve the commercial value of the eggplant, and maximize your own economic benefits.