How to look at Seedling fertilization during the period of Wheat returning to Green

Spring is coming, the earth is in harmony, the wheat wakes up from hibernation, and the wheat field is much greener. At this time, many peasant friends will ask: do I need to fertilize my wheat? What kind of fertilizer should I apply? How much fertilizer is appropriate and my answer is: it depends on the seedling fertilization.

From the physiological point of view of wheat, from turning green to getting up, wheat plants continue to tiller, leaf and root, and begin young spike differentiation, which is the most favorable period to consolidate strong seedlings before winter, strive for weak seedlings to become strong, and inhibit the growth of prosperous seedlings. Therefore, it is very necessary to adopt different fertilization measures according to different types of wheat fields. The fertilization of seedlings can be summarized in three words: protection, promotion and control.

Guarantee

A kind of wheat field with six leaves, four to five tillers, about 800000 mu of total stem, strong plant, normal leaf color and no yellowing when it overwintered a year ago, do not fertilize and water immediately after turning green, in case it grows too much and consumes too much nutrition, which is not conducive to high yield in the later stage. In this kind of wheat field, measures such as hoeing, weeding and pest control should be taken to ensure effective tillering and safe growth before the year, which is beneficial to improve the spike rate of wheat and lay a good foundation for the high yield of wheat in the later stage. This kind of wheat field is mainly for protection. Wait until before and after the jointing stage of wheat, and then fertilize and water, which is called nitrogen post-transfer fertilization method, which is beneficial to the high yield of wheat.

Promote

Wheat fields planted too late a year ago, poor fertility conditions and insufficient bottom fertilizer; wheat seedlings short and few tillers when overwintering; three types of wheat fields where the plant is weak, the leaves turn yellow, and the total number of stems per mu is less than 400000 when turning green; or if the straw is returned to the field without overwintering water, the soil is loose and permeable, the soil is dry, and the phenomenon of hanging roots of wheat seedlings is similar to that mentioned above, green water should be poured back in time and re-green fertilizer should be applied.

It is very important to choose the right fertilizer for this kind of wheat seedlings! First, do not apply or less organic fertilizer. As the saying goes: fattening the land, chemical fertilizer to promote seedlings. Due to the low temperature in early spring, the decomposition of farm manure is slow, which can not meet the nutrient needs of wheat. Second, should apply quick-acting chemical fertilizer, fertilizer effect is fast, can supply the need of wheat growth and development in time, can apply urea 10-15kg per mu, pour good green water. On this basis, spraying Luhong retrograded foliar fertilizer (30ml / bag) again can promote new roots, cold resistance, drought resistance and disease resistance, which is beneficial to the transformation from weak seedlings to strong seedlings of wheat. Third, when applying fertilizer, we should also pay attention to the weak seedlings in some high-yield fields and apply some eccentric fertilizer to make their growth consistent and help to increase the yield of wheat.

Control

Sowing too early a year ago, the sowing rate was too large, and wheat flourished before the year ago. due to prematurely closing ridges, spreading leaves, and leaves being too big and too thin, after turning green, we should take measures mainly to control them, draw more hoes, try not to water as much as possible, and squat seedlings. We should also pay close attention to whether there is frost injury, and if there is frost injury, corresponding measures should be taken.

As the saying goes: wheat is not prosperous, if very prosperous wheat seedlings need to be regulated by suppression, deep hoe or chemical control technology before jointing, you can use 200PPM concentration of paclobutrazol or 0.15%-0.3% dwarf element, spray with water 30~40Kg per mu to control wheat growth and prevent wheat from losing fertilizer in the later stage. This kind of wheat field should be fertilized and watered at the budding stage.