What fertilization skills should be mastered during the full fruiting period of vegetables? What is the effect of applying too much fertilizer?

After the vegetables entered the full fruit period, they also entered the peak period of absorbing water and fertilizer. Although the demand for nutrients is roughly the same, that is, low nitrogen, low phosphorus, high or medium nitrogen, low phosphorus, high potassium. However, there are some differences in fertilizer use among different types of vegetables and different ways of cultivation and management. So, what fertilization skills should be mastered during the full fruit period of vegetables? What is the effect of applying too much fertilizer?

1. Fertilization techniques in the full fruit period of vegetables

In the full fruit period of vegetables, plants have a great demand for nutrients. It is suggested that vegetable farmers should apply fully nutritious water-soluble fertilizer with comprehensive nutrients and high absorption and utilization, one is to meet the nutrients needed for the growth of roots, stems, leaves, flowers and fruits, and to avoid the phenomenon of element deficiency such as nutrient imbalance, the second is high absorption and utilization rate, reduce fertilizer loss and reduce the degree of soil salinization. Such as Dutch iprungen, German Panta water-soluble fertilizer and so on. In addition, trace elements are indispensable, for example, boron is necessary for plant pollination, fruit setting and seed development. Supplementation of boron-containing fertilizers can promote flower bud differentiation and prevent flowering and fruiting. It is suggested that vegetable farmers should promote the rapid absorption of plants by foliar spraying of medium trace element fertilizer, such as spraying Ibuprofen, covering magnesium and so on.

1. Control the amount of nitrogen fertilizer during the full fruit period of tomato.

After the tomato enters the full fruit stage, the expansion and color conversion of the fruit become the key to improve the commerciality, and many vegetable farmers are easy to walk into the misunderstanding of the interaction between fruit expansion and color conversion.

Tomato fruit production is relatively concentrated, usually the upper fruit is in the expansion period and the middle and lower fruit is in the color conversion period, which requires adequate nutrient supply and can not be affected by excessive nutrients.

It is understood that there are many tomato growers are faced with such a problem, after several consecutive applications of fertilizer, the fruit appeared more rotten fruit, affecting the fruit color change. The reason for this problem is that vegetable farmers use more fertilizers and do not choose the appropriate content ratio. Generally speaking, the use of fertilizers containing more ammonium nitrogen will affect the absorption of potash fertilizer. The imbalance of carbon to nitrogen ratio in the fruit will affect the color conversion.

Therefore, it is necessary to control the excessive input of nitrogen fertilizer during the full fruiting period of tomatoes. Generally speaking, water-soluble fertilizers with low nitrogen, low phosphorus and high potassium can be selected during the full fruit period of tomatoes. Take 60 products as an example, no more than 20 jin per mu each time.

2. The use of nitrogen and potassium should be coordinated during the full fruit period of eggplant.

The coordinated use of nitrogen and potassium is based on the cultivation mode of eggplant. Take long eggplant as an example, the cultivation method adopted by most vegetable farmers is the short branch fruit, that is, when the two main stems grow to the height of the steel wire of the hanging vine, the short branch fruit is carried out by using the meristematic lateral branches. The growth of lateral branches needs a certain supply of nitrogen fertilizer, and the expansion of fruit has a great demand for potassium.

Therefore, the fertilizer ratio of medium nitrogen, low phosphorus and high potassium should be the main topdressing fertilizer in the full fruit stage of eggplant. Generally, about 25-30 jin per mu can be applied each time.

3. High potassium and balance should be used during the full fruit period of melons.

Different from eggplant fruit vegetables, the growth of stem vines does not weaken after melon vegetables enter the full fruiting stage. if the nutrients of high potassium and low nitrogen continue to be given priority to, it will cause stem vine malnutrition and then affect the future yield. Therefore, topdressing of melons and vegetables should be rotated with two types of fertilizer: high price and balanced fertilizer.

Generally speaking, for every two uses of high potassium fertilizer, a balanced fertilizer should be used in the middle. Melons and vegetables have a high yield and need a large amount of fertilizer, so the amount used each time per mu is generally about 25-30 jin.

4. Proper control of potash fertilizer during the full fruit period of legumes.

Compared with eggplant fruit and melon vegetables, legume vegetables have lower yield and less demand for nutrients. After legume vegetables enter the peak period of podding, although the demand for potash fertilizer is high, the amount of potassium should be accurate.

Because for the commerciality of legume vegetables, too much potassium is easy to bulge, resulting in low commerciality. Therefore, in the peak podding period to use balanced fertilizer, interspersed with a medium or high potassium fertilizer, generally 5-8 kg per mu.

Second, what are the effects of excessive fertilization?

When there is too much nitrogen fertilizer, it is often found that the leaf area increases and the leaf color is dark green. In severe excess, salt injury symptoms such as thick and hard leaves, twisted leaves, reduced fruit or twisted melon strips will be found.

When there is too much phosphate fertilizer, there will be chlorosis symptoms such as zinc deficiency, iron deficiency and magnesium deficiency, because the dissolved phosphate fertilizer will combine with these elements in the soil and reduce their effectiveness.

Third, what will be the impact of the simple application of high potassium fertilizer?

Balanced fertilization should be applied to vegetables during the full fruiting period, and high potassium fertilizer should not be applied simply. It is suggested that vegetable farmers should make a scientific fertilization plan according to the fertility of the soil and the amount of base fertilizer used. For the plots where the use of potassium fertilizer is too high, the methods of watering clear water and stopping topdressing potassium fertilizer can be used to reduce the content of potassium in the soil, spray some foliar fertilizer to stimulate the growth of roots and leaves, and promote the normal growth of vegetable plants.