Fertilization of irrigated wheat
First, formula base fertilizer. For the irrigated condition, the high yield and stable production of wheat can be achieved. The amount of basal fertilizer is generally about 3,000 kg of organic fertilizer per acre; pure nitrogen (N) is 5-7 kg, phosphorus pentoxide (P2O5) is 6-8 kg, and potassium oxide ( K2O) 4 to 6 kg.
According to the above fertilizing amount, the autumn fertilizer can be applied as one of the following fertilization schemes:
Option 1: Mushi urea 11 ~ 15 kg, superphosphate (containing P2O516%) 40 ~ 50 kg, potassium chloride 7 ~ 10 kg.
Option 2: Mushi ammonium bicarbonate 30 ~ 40 kg, superphosphate (containing P2O516%) 40 ~ 50 kg, potassium chloride 7 ~ 10 kg.
Option 3: Mushi Sanyuan Compound Fertilizer (15% for N, P2O5, K2O) 40 to 50 kg.
Option 4: Mushi DAP (or monoammonium phosphate) 13 ~ 17 kg, urea 10 kg (or ammonium bicarbonate 30 kg), potassium chloride 7 ~ 10 kg.
The principle of the selection program is: in the past, the fertilizing amount was higher than the recommended maximum fertilizing amount, and the fertilized amount of fertilized soil was the lower limit. For example, the large-scale application of phosphate fertilizer, the soil available phosphorus (P) greater than 20PPM, and the rich yellow area In potassium soil, the lower limit of phosphorus and potassium can be used, and vice versa. The upper limit of the amount of nitrogen fertilizer that can be used to return all corn stalks.
For wheat fields lacking in zinc or boron and other trace elements, or for long-term no application, basal magnesium can be used as 1 to 1.5 kg of sulphate and 0.5 kg of borax. For wheat that lacks calcium, magnesium, or sulfur, or does not use calcium phosphate for a long time, fertilization with calcium superphosphate may be used.
Second, Pu Shi fertilizer. Fertilizer can quickly meet the needs of seedlings for nutrients and is very beneficial to the formation of strong seedlings. When applied, seed and fertilizer should be applied separately to avoid burning seed. Suitable for the main varieties of seed fertilizer are: urea, diammonium phosphate. It is best to mix the two in a 1:1 ratio. The amount is generally about 30% of the seed weight.
Third, skillfully applying fertilizer. The wheat fields with strong growth, reasonable groups and prosperous growth, and large groups are generally not top-dressing or water-free during the period of returning to the green period. The top-dressing can be delayed until the wheat arrives at the jointing stage. Wheat seedlings growing weakly, the group is too small can be appropriate fertilizer in advance, the first time in the return period, Mushi urea 5 to 7 kilograms, the second after the jointing, depending on the seedlings growing Mushi 5 to 10 kg. The wheat field with moderate fertility and less population is usually watered in the jointing period or at the beginning of jointing (1.5 to 2 cm from the ground in the first quarter of the base), depending on the seedling growth and 15 to 20 kg of urea. The wheat fields with high soil fertility levels, over-exuberant growth, and suitable or oversized groups can be appropriately pushed back to the middle and late jointing stages (basic first quarter near fixed length) for top dressing and watering. Generally, Urea 10-15 kg of urea is appropriate.
Dryland wheat fertilization
On the basis of more than 2000 kg of organic fertilizer in Mushi, nitrogen, phosphorus, and potassium fertilizers are applied in combination to achieve high yields. The target production is in a plot with a yield of over 300 kilograms per mu. The total amount of fertilizer applied is: pure nitrogen 10 to 12 kg, phosphorus (P2O5) 8 to 10 kg, and potassium (K2O) 5 kg. Of the total amount of fertilizer mentioned above, all organic fertilizers, phosphate fertilizers, potash fertilizers, and 70% to 80% of nitrogen fertilizers were used as base fertilizers. In the spring of the second year of soil returning to the soil, the remaining 20% â€‹â€‹to 30% of the nitrogen fertilizer is applied (or the rainwater is applied after turning green).
According to the above fertilizing amount, the autumn fertilizer can be applied as one of the following three fertilization options:
Option 1: Mushi urea 16 to 20 kilograms (or ammonium bicarbonate 40 to 50 kilograms), superphosphate 50 to 60 kilograms, potassium chloride 8 kilograms.
Option 2: Mushi Sanyuan Compound Fertilizer (N, P2O5, K2O each 15%) 50 to 70 kg.
Scheme 3: Mushi DAP (or monoammonium phosphate) 18-22 kg, urea 8-13 kg (or 22-35 kg ammonium bicarbonate), potassium chloride 8 kg.
The principle of the selection scheme is: on the basis of the dry and thin land with an output of less than 300 kilograms per mu, and based on 2000 kg of high-quality organic fertilizer in Mushi, the total amount of chemical fertilizer applied shall be the lower limit of the amount of fertilizer applied above, and potassium fertilizer may not be applied. In the past, the fertilizing amount was higher than the recommended maximum fertilizing amount and the fertile soil fertilization amount was lower. On the contrary, the high limit was selected.
For dryland wheat, it is necessary to apply fertilizer in combination with rainfall in the spring. If there is no rainfall, urea can be dissolved in water and then applied by ditching. General mu urea 5 ~ 7.5 kg.
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