Characteristics of tomato fertilization.
Today let's talk about tomatoes. Due to the long growing period of tomatoes, the amount and economic yield of it are high. For example, tomatoes are cultivated in greenhouses, and the growth period can reach hundreds of days. In northern Xinjiang, there are some high-yield fields that can reach more than a dozen tons, and it is impossible to produce so many fruits with sufficient fertilizer.
Growth requires an adequate amount of nutrients. The absorption of phosphorus and potassium is the most potassium, but the second phosphorus fertilizer is less. Each winter of tomatoes needs to store about 2.4 kg of nitrogen, and 1.7 kg of zero. Potassium 4.8 kg, magnesium in the element 0.6 kg, calcium needs 2.2 kg. However, due to the large number of cultivation forms, the absorption of 31 trees is different from the low-temperature varieties and fertilizer types in the growing period.
Vegetarian has a great effect on the growth of roots, leaves, flowers and fruits of tomatoes. Nitrogen deficiency, its plants are yellowing and slow growing, the fruit is small and the yield is low. However, excessive nitrogen can reduce the disease resistance of plant soil growth, but it is indispensable at the seedling stage, but its demand is very low. Excessive seedling stage can delay its flowering, less fruiting, and the demand for eggs is very large.
Among the types of nitrogen, tomatoes are one of the crops that wash nitrogen. In cultivation, the use of nitrine nitrogen and other nitrogen ratios should be adjusted according to the growth and development of tomatoes and soil conditions, which is a technology to increase yield. At the same time, note that excess nitrogen can cause the absorption of pseudocationic elements.
Phosphate fertilizer can promote flower bud differentiation, root development and fruit growth of tomatoes. Phosphorus absorption is highest in the early stages. Generally, the time it takes for the fruit to grow to the size of a soldier tennis ball, the absorption force accounts for about 90% of the total depth expected. Therefore, its seedling period, Lin Fei can not be lacking. It affects the differentiation of flower buds. The lack of phosphate fertilizer will also affect the absorption of nitrogen and affect the growth of tomatoes.
In addition, phosphorus is a relatively difficult fertilizer to absorb, especially at low temperatures, the phosphorus absorption capacity of tomatoes is very low. Sometimes there is no shortage of phosphate fertilizer, showing a symptom of phosphorus deficiency. In cultivation, the amount of phosphate fertilizer should be appropriate, early moist. When phosphorus is deficient, its stem feeling is relatively weak, the leaves are relatively small and hard, and the back of the leaves is usually purple. However, excessive phosphorus will also greatly enhance the respiration of crops, and consume some of the stored sugar and some energy in the crops, and also induce zinc and wood deficiency in the soil.
The absorption of potassium by tomatoes is the largest of the three elements. Potassium can not only promote the healthy sense of plant progress, increase the quality of fruit, but also promote the operation of nutrients in the plant. If potassium is deficient, tomato resistance is poor, and disease resistance will be weakened. The fruit is not vibrant, and the color of the fruit is poor.
The absorption of potassium by tomatoes is relatively small at the seedling stage, but from the first crisp fruit fruit, it rises in a straight line, and the stone does not reduce its false amount until the later stage of the tomato. Therefore, after the beetle seedling, it should be evenly supplied.
When potassium is deficient, the leaves are small, the leaf veins lose chlorine, and accompanied by dead spots, the fruit will be poorly irradiated, and even have dead spots in severe cases. However, excessive consumption of potassium fertilizer will also cause the absorption of magnesium and calcium and other trace elements in tomatoes, especially excessive consumption of potassium fertilizer will also affect the absorption of nitrogen nutrients by tomatoes, resulting in the growth and development of tomatoes being hindered. As a result, tomatoes have small roots and thin roots, which are easy to lodg.
In addition to the above three elements, tomatoes also prefer sulfur, calcium, magnesium, iron, manganese, boron and other elements, but the demand is relatively small. When these elements are deficient, tomatoes can also grow poorly. When excessive use of an element, even some hyperactivity, is some element deficiency, lack of symptoms and prevention methods, should be according to the actual situation analysis, specific treatment.
