First, the first ear fruit is not developed
As can be seen from the above figure, the second ear has already had the size of the pigeon egg, and the first ear has not yet grown. Normal development should be: When the second ear is developed to this extent, the first ear should have an egg size. However, during the actual growth process, the first ear is small, and some even directly thank the flower.
Tomatoes colonized during high temperature are prone to this. Most of the areas are now prone to the long period of tomato tweezers. This long and prosperous will cause the first ear fruit to not grow or grow very slowly, and eventually develop into a sub-fruit.
A closer look reveals that the first ear is lower in the stem and the stem is suddenly thicker. Because after the flowering point, when the first ear fruit is about to enter the fruiting stage, the plant enters a long state due to changes in the external environment, causing dystrophic growth and reproductive growth. Why is it prosperous? The temperature is relatively high, the light conditions are better, and the water and fertilizer are relatively sufficient, especially in the case of partial application of nitrogen fertilizer and phosphate fertilizer.
Second, the growth point stops growing
Due to poor management (temperature, water and fertilizer are not well controlled), the first two ears of fruit expanded quickly, causing the growth point to stop growing. It is difficult for such a plant to grow a branch, so the overall yield will be greatly affected.
Let's talk about the common problems after the tomato enters the fruiting period.
Third, the prolonged cause of tomato deficiency of calcium deficiency
Many people have named it as a blight-free disease caused by prolonged boron deficiency. In fact, the blight is caused by the lack of boron.
Why is there a shortage of boron in the case of prosperous?
Everyone knows that the role of boron fertilizer belongs to the role of the transportation team leader, responsible for the redistribution of nutrients in the body. When the nitrogen fertilizer is used more, the length of the leaves is large, and the photosynthetic products are much produced. The demand for boron fertilizer is relatively large, and it is easy to produce boron deficiency symptoms at this time. Once the plant is deficient in boron, necrosis occurs at the point of growth or lateral cracks appear at the stem.
Boron deficiency is also very likely to cause calcium deficiency in tomatoes.
In our entire management process, once we find that the first ear is deficient in calcium, we can judge that the plant grows long. Because only the plants are long and prolonged, they will cause calcium deficiency in the first ear. Due to years of planting in the north shed and acidification of the soil in the south, the soil itself will be fixed, and because of the high phosphorus in the plant, calcium and zinc nutrients will be fixed, so that the fruit shows symptoms of calcium deficiency.
The situation of local farmers has been diagnosed on the spot, and it is found that the young fruit caused by the prosperous plant is lack of boron and calcium deficiency.
Fourth, nutritional disorders: lateral growth is greater than longitudinal growth
The stems of the plants are particularly thick, the internodes are particularly short, the leaves are extremely long, and the top of the head is significantly weakened. The top advantage is too weak and the lateral growth is greater than the longitudinal growth.
Typical lateral growth is greater than longitudinal growth.
Tomato growth consists of trunks and branches, with a distinct growth point. There is a clear boundary between the growth point and the later emerged branches. At first glance, it is easy to distinguish which is the growth point and which is the branch. However, due to malnutrition, the situation in the above picture will appear: it is impossible to accurately determine which one is the growth point and which one is the sputum. If this situation is not treated, the growth point will naturally stop, which will seriously affect the yield. Even if the growth does not stop, the internodes are short, the distance between the ears is particularly small, and the interstices are particularly dense, which seriously affects photosynthesis.
Why does the growth of the tomato grow slower, the stems are thicker, the leaves are particularly large, and the fruits that should have developed should not develop well?
First, high temperature, and high temperature at night, respiratory consumption consumes more nutrients, resulting in less nutrition in the lower reproductive organs.
Second, there is a bias in fertilizer application. How to achieve precise fertilization, we must carry out fertilization according to variety, environment and growth. Like the first picture above, if the first time is not to apply balanced fertilizer, but to apply high potassium fertilizer, this problem will not occur.
Third, the phosphorus and zinc deficiency cause the top to weaken. Excessive phosphorus fertilizer will fix zinc fertilizer. Zinc is mainly synthetic gibberellin and auxin, mainly concentrated in the top of the crop, root tip and shoot tip.
Fourth, large leaf varieties, small seedling age is prone to these situations. Also knowing the above reasons but not adjusting the growth of the plants in time is also the cause of these symptoms.
V. Nutritional disorders: the stem is weak and the top advantage is strong
During the fruit expansion period, the stems are relatively weak, and the top growth is relatively strong.
Reason for formation:
First, high night temperature. At night, the nutrient consumption of the respiration is relatively large, and the downward reflow is affected.
Second, continuous rain or weak light causes growth to grow.
Third, the type of fertilizer used is wrong.
Fourth, lobular varieties or aging seedlings are prone to strong apical advantages in later management.
Fifth, the adjustment plan is wrong. For example, the management of small leaf varieties and large leaf varieties will definitely cause problems.
When the tomato enters the fruit-expanding period, it is caused by some uncoordinated problems because the growth is not normal. Let's talk about how to balance this balance between crops?
First, balance the ratio of leaves to fruit.
The leaves are the source and the fruit is the reservoir. The reservoir is small and the fruit is swollen slowly. Because of the weak nutritional synthesis, the fruit is naturally slow. The small source of the reservoir is large (the leaves are particularly numerous, and the fruit development has not yet formed), and it is easy to grow at high temperatures. The number of blades is large, pay attention to the quality of light. There are many leaves, and each other is shaded. The surface is particularly strong, but the fruit is slow, and it is particularly prone to premature aging. Because there are many blades, in the middle and late stages, most of the following blades do not see the sun, so they naturally age off. The number of blades is small, and attention should be paid to the vitality of the blades. Although there are few leaves, we have to use the function of the leaves to avoid aging of the leaves caused by spraying and fertilizing.
Second, balance the temperature difference.
1. The temperature difference is small, that is, the temperature difference of 10-15 °C is not opened day and night. The higher night temperature will cause the nutrient consumption, the natural accumulation is less, and the expansion speed is very slow.
2. Only when the temperature difference is appropriate, consume less and accumulate more. The purpose of planting tomatoes is to achieve an ideal yield, so we need to reduce some unnecessary consumption.
3, the temperature difference is particularly large. It is very dangerous when the temperature is extremely low at night. Because the night temperature is low, the nutrients produced during the day cannot be transported to the fruits and roots in time, which will cause the leaves to age, such as the formation of starch leaves.
Third, balance the root to crown ratio.
In production, many people tend to focus only on the ground and ignore the underground. In fact, the roots rely on the leaves to provide nutrition, and the leaves absorb the water and nutrients in the soil by the roots. Therefore, the roots depend on the leaves, and the leaves are rooted; the two are the source of each other, and the lips are cold. Therefore, we must pay attention to the ratio of root to shoot in management, to avoid the problem of slow development of roots and roots in the early stage of the above-ground.
Fourth, balance the soil water-gas ratio.
In fact, many people pay attention to the water, fertilizer and temperature in the soil, and often ignore the air content in the soil. The water and gas in the soil are a pair of happy family, and the increase of water in the soil leads to the reduction of soil air. In actual production, water is large and oxygen is deficient, while roots absorb nutrients and aerobic respiration. The water is deprived of oxygen, the root system is easy to break, and blight and root rot may follow. On the contrary, when there is much soil air and less water, high temperature and drought are also likely to cause root aging.
Fifth, balanced fertilization.
Balanced fertilization requirements have an understanding of the status quo of the soil, and generally know the abundance of large and medium trace elements, so as to complement. In addition, organic fertilizer is applied more because inorganic elements can be sequestered during fermentation to increase nutrient utilization. Moreover, after the organic fertilizer, especially the crude fiber of the straw type, is applied to the soil, the soil aggregate structure can be increased and the soil environment can be improved. Only when the soil environment is suitable, the large and medium trace elements that we apply will be well absorbed by the plants. In fact, there is very little nutrient deficiency in the soil, especially in some old vegetable areas. The nutrients in the soil are mostly exceeded, which is due to the unfavorable soil environment (peracid, over-alkali, compaction, water and oxygen deficiency, etc.).
Sixth, balance the pH.
The activity of nutrient elements is closely related to the acidity and alkalinity in the soil. In the production, there are many soils that are over-acidic and cause symptoms of crop defects. So how is the soil acid and alkali adjusted? Simple and straightforward, some acid-base neutralization methods can be used. The best method is to adjust with some organic fertilizers such as straw crude fiber. As long as the soil organic matter is increased, the microbial growth is faster, and the soil quality level will be improved.
Before the tomato enters the fruit-expanding period, the growth contradiction is relatively small, and there are few problems. However, after entering the fruit expansion period, the contradiction between vegetative growth and reproductive growth will appear quickly. We must find out in time and quickly adjust. Otherwise, it will lead to abnormal tomato growth: late dead tree, yellow leaves, fruit development is not normal.
Solar Garden Light,Solar Garden Light ,Solar Powered Garden Lights,Solar Camping Lamp
NINGBO ZHENGUO INTELLINGENT LIGHTING CO.,LTD , https://www.intellingentlighting.com