What are the skills of selecting fertilizer in summer? What are the matters needing attention in fertilization?

Summer is a period of exuberant growth of many vegetables, fruits and so on, and it is also a good time to need fertilizer. However, many growers do not know how to choose fertilizers and fertilizers, resulting in a serious reduction in their output. Let's take a look at the summer fertilizer selection skills. What are the matters needing attention in summer fertilization?

First, what are the skills of selecting fertilizer in summer?

One is to choose quick results. With the increase of temperature, the nutrient absorption capacity of crops is also strengthened. for the law of fertilizer demand of summer crops, on the one hand, fertilizer intensity is high, that is, more fertilizer is needed. On the other hand, the soil is required to have a sustainable fertilizer supply capacity, but Rain Water has a serious loss of fertilizer in summer, so it is easy to use a small number of methods to quickly supplement nutrients in summer fertilization.

In the form selection, it is suggested that the available nitrate nitrogen fertilizer and ammonium nitrogen fertilizer should be used to replenish nutrients for crops quickly.

The second is to select the crop special fertilizer suitable for the growth target. For example, for a series of AIDS care plant vaccine products that can be quickly absorbed on the page, for fruiting crops or tuber crops, the summer fertilizer selection is mainly quick-acting, high nitrogen fertilizer, high nitrogen and high potassium, such as apple, citrus, grape, kiwifruit, pomegranate and other crops.

For leafy vegetable crops that harvest leaves or branches, summer fertilization should mainly supplement nitrogen fertilizer.

Second, what are the matters needing attention in summer fertilization?

1. Quantity of fertilizer

In the hot and dry season, under the strong light, the temperature of the exposed ground can reach 50 ℃, the evaporation is strong, and the concentration of surface water solution increases rapidly. at this time, if the same amount of fertilizer is applied as in normal weather, the crop yield can not be maintained or increased, but is likely to be reduced. For example, when the precipitation is moderate, the application of 12 kg of pure nitrogen per mu of corn may achieve high yield, and it is at risk of reducing yield if the same amount of fertilizer is applied during high temperature and drought. Some farmers reported that last year's high temperature and drought, the level of fertilization of Atractylodes macrocephala Koidz was the same as the year before last. As a result, the yield of Atractylodes macrocephala Koidz decreased rather than increased, and the yield of those who did not apply fertilizer was higher than that of fertilization.

2. Fertilization time

Fertilization in the morning, although the personnel feel more comfortable, but with the rise of the sun, the temperature rises sharply, water is quickly evaporated, crop absorption time is short, fertilizer use efficiency is low; fertilization at noon, because of the high temperature, it is not conducive to fertilizer absorption and personnel operation. Fertilization in the evening is not only suitable for personnel operation, but also can make up for the shortcoming of short absorption time of crops (because the evening is a process of decreasing temperature, surface water evaporation is weakened, water retention time is long), and it is the best fertilization time.

3. Fertilization weather

Do not apply fertilizer in rainy days to avoid fertilizer loss; do not apply fertilizer in stuffy days, do not apply fertilizer in foggy days, and do not apply fertilizer in high temperature, so as not to cause plant mildew, so fertilization should be carried out on sunny days.