After the spring, the wheat enters the greening and jointing stage. These two growth stages are very important for wheat growth and development. After the wheat returns to green, the growth is prosperous, and the nutrient absorption is also gradually increased. Therefore, it is the key to pursue the jointing and earing fertilizer. According to the fertilizer requirement of different types of wheat and soil fertility in wheat field, based on the application of organic fertilizer, rational application of chemical fertilizer, generally high-yield fields control nitrogen, stabilize phosphorus, increase potassium, make up micro; middle-field stabilize nitrogen, increase phosphorus, Targeted application of potassium fertilizer. Pay attention to the following aspects in fertilization:
First, look at the seedlings
Wheat fields with poor growth, early sowing, and long de-fertilization before winter should be applied early and re-applied to green fertilizer. Generally, when the surface begins to freeze, the mu is about 10 kg of urea. The leaves of the wheat seedlings are green and green, the leaves are drooping, and there is no de-fertilization phenomenon. The wheat fields with large populations generally do not apply nitrogen fertilizer or less nitrogen fertilizer, and can apply about 8 kg of phosphorus and potassium fertilizers; the soil fertility is poor, the sowing is late, the seedlings are The growth is poor, the number of branches per plant is small, and the number of small wheat fields should be 10 kg per mu, and 5-6 kg of superphosphate and potassium oxide should be applied. Wheat fields with a large number of seedlings or high fertility without de-fertilization will not be returned to the green fertilizer, and will be postponed to the topdressing period.
Second, look at the fertility of the wheat field
The fertility level of the upper soil is higher. In the wheat field where sufficient organic fertilizer is applied, no or no nitrogen fertilizer should be applied in the spring, and only phosphorus and potassium fertilizers should be applied. The soil fertility is poor, and the wheat field with insufficient base fertilizer application should be applied with some nitrogen fertilizer, and combined with phosphorus and potassium fertilizer. When the wheat is in the body, the middle and low-yield wheat fields should be fertilized early and the body water should be poured out. For the strong seedlings of the high-yield wheat fields, on the basis of controlling the greening, the body-building period should be the main stage of the fertilizer. In the early stage, the fertilization should be moderate or heavy, and the fertilization should be early and heavy, and vice versa.
Third, look at the development of wheat seedlings
In the first ten days of March, it is the best time to apply jointed fertilizer. At this time, fertilization can promote the formation of panicles, increase the rate of ear formation, promote the differentiation of spikelets and florets, and promote the growth of the top three leaves. For wheat fields with lighter leaf color and de-fertilization trend, it is necessary to apply early, apply heavy fertilizer, and pour water. For wheat fields with dark green leaves, no yellowing, and large leaves, it should be watered late, with little or no fertilization.
Fourth, foliar spray fertilizer
Generally, heading to the hot period, such as yellowing of leaves, de-fertilization and premature aging of wheat fields, focusing on spraying nitrogen fertilizer, spraying 1%-2% urea solution or 2%-4% ammonium sulfate solution 50-60 kg per mu. Increase production results.
Author: Han Wei Source: Plant Protection Station of Dali County
First, look at the seedlings
Wheat fields with poor growth, early sowing, and long de-fertilization before winter should be applied early and re-applied to green fertilizer. Generally, when the surface begins to freeze, the mu is about 10 kg of urea. The leaves of the wheat seedlings are green and green, the leaves are drooping, and there is no de-fertilization phenomenon. The wheat fields with large populations generally do not apply nitrogen fertilizer or less nitrogen fertilizer, and can apply about 8 kg of phosphorus and potassium fertilizers; the soil fertility is poor, the sowing is late, the seedlings are The growth is poor, the number of branches per plant is small, and the number of small wheat fields should be 10 kg per mu, and 5-6 kg of superphosphate and potassium oxide should be applied. Wheat fields with a large number of seedlings or high fertility without de-fertilization will not be returned to the green fertilizer, and will be postponed to the topdressing period.
Second, look at the fertility of the wheat field
The fertility level of the upper soil is higher. In the wheat field where sufficient organic fertilizer is applied, no or no nitrogen fertilizer should be applied in the spring, and only phosphorus and potassium fertilizers should be applied. The soil fertility is poor, and the wheat field with insufficient base fertilizer application should be applied with some nitrogen fertilizer, and combined with phosphorus and potassium fertilizer. When the wheat is in the body, the middle and low-yield wheat fields should be fertilized early and the body water should be poured out. For the strong seedlings of the high-yield wheat fields, on the basis of controlling the greening, the body-building period should be the main stage of the fertilizer. In the early stage, the fertilization should be moderate or heavy, and the fertilization should be early and heavy, and vice versa.
Third, look at the development of wheat seedlings
In the first ten days of March, it is the best time to apply jointed fertilizer. At this time, fertilization can promote the formation of panicles, increase the rate of ear formation, promote the differentiation of spikelets and florets, and promote the growth of the top three leaves. For wheat fields with lighter leaf color and de-fertilization trend, it is necessary to apply early, apply heavy fertilizer, and pour water. For wheat fields with dark green leaves, no yellowing, and large leaves, it should be watered late, with little or no fertilization.
Fourth, foliar spray fertilizer
Generally, heading to the hot period, such as yellowing of leaves, de-fertilization and premature aging of wheat fields, focusing on spraying nitrogen fertilizer, spraying 1%-2% urea solution or 2%-4% ammonium sulfate solution 50-60 kg per mu. Increase production results.
Author: Han Wei Source: Plant Protection Station of Dali County
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