After the spring, winter wheat enters the greening stage, followed by the tillering stage to the jointing stage. These two growth stages are very important for high-yielding winter wheat. The time from wintering to picking the flag of winter wheat is the spring growth stage, which lasts for 50~. 60 days is a critical period for the formation of production. After the wheat returns to green, the growth is prosperous, and the absorption of nutrients is gradually increasing. Therefore, it is imperative to pursue the jointing of the panicle fertilizer. The pursuit of jointing and booting fertilizer in spring is the key to promoting the transformation of wheat seedlings and robust growth, and is also an important measure to ensure high yield and stable yield.
In the spring wheat application of chemical fertilizers, the purpose of promoting high yield, high quality, high efficiency and resource conservation of wheat should be based on the fertilization regularity of different types of wheat and the fertilization status of wheat in the wheat field. Based on the application of organic fertilizer, rational application of chemical fertilizers should be carried out. Fertilizer utilization and reduce soil pollution. In general, high-yield fields control nitrogen, stabilize phosphorus, increase potassium, Supplement micro-middle fields, stabilize nitrogen, increase phosphorus, and apply potassium fertilizer.
From the physiological point of view of wheat, from the stage of rejuvenation to the stage of getting up, the plants of wheat continue to divide tillers, leaves and hair roots, and begin to differentiate young ears, which is to consolidate the strong seedlings before winter, to strive for weak seedlings, and to inhibit the growth of seedlings. The most favorable period. Therefore, according to different types of wheat fields, it is necessary to adopt different fertilization measures. Seeing seedling fertilization can be summarized in three words: protection, promotion, and control.
When the winter is over, it has reached the "six leaves and one heart", four to five branches, the total stem of the acre has reached 800,000, the plants are robust, the leaves are normal, and the yellow is not yellow. Fertilizing and watering to prevent excessive growth and excessive consumption of nutrients is not conducive to high yield in the later period.
In this type of wheat field, measures such as rowing, weeding, pest control, etc. should be taken to ensure effective tillering and safe growth before the year, which is conducive to increasing the rate of wheat heading and laying a good foundation for high wheat yield in the later period. This type of wheat field is dominated by "guarantee". Wait until the wheat jointing period, and then fertilize and water, this is called nitrogen post-fertilization method, which is beneficial to high yield of wheat.
Promote wheat plants that were planted late in the year, have poor fertility conditions, and have insufficient base fertilizer; when wintering, the wheat seedlings are short and have few tillers; when they return to green, the plants are weak, the leaves are yellow, and the total number of stems is less than 400,000; Straw returning to the field did not water the winter water, the soil is loose and breathable, the water evaporation is strong, the soil is dry, and the wheat seedlings appear to hang the root phenomenon... Similar to the above situation, it is necessary to timely return to the Qingshui and apply the green fertilizer.
It is important to choose the right fertilizer for this type of wheat seed! First, do not apply or use less organic fertilizer. As the saying goes: circle fertilizer to raise land, fertilizer to promote seedlings. Due to the low temperature in early spring, the decomposition of farmyard manure is slow and cannot meet the needs of wheat for nutrients. Secondly, it is necessary to apply quick-acting chemical fertilizer, which has quick fertilizer effect and can supply the growth and development of wheat in time. It can apply 10~15 kg of urea per acre and pour the fresh water.
On this basis, re-spraying Luhong back to the raw leaf foliar fertilizer (30 ml / bag) once, can promote new roots, cold resistance, drought resistance, disease resistance, is conducive to wheat weak seedlings to strengthen seedlings. Third, when fertilizing, we should also pay attention to the weak seedlings in some high-yield fields. It is necessary to apply some eccentric fertilizer to make their growth consistent, which is conducive to wheat yield increase.
Before the control, the planting was too early, the amount of sowing was too large, and the wheat that grew long before the year appeared. Because of the premature closure of the ridge, the leaves were scattered, the leaves were too large and too thin, and after returning to green, they should be controlled by "control". Measures, more slashing, try not to water, pick up the seedlings, should also pay close attention to whether there is freezing damage, if there is freezing damage, should take corresponding measures. (Gansu Peasant Newspaper)
This article URL: How to fertilize wheat after entering the greening period after spring
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