After the wheat enters the jointing stage, timely and scientific and reasonable application of wheat jointing fertilizer can promote wheat tillering and increase the seed setting rate and 1000-grain weight. Therefore, when applying wheat jointing fertilizer, you must do "three to do":
First, the application time is generally stopped in the first quarter of wheat, the beginning of the second quarter, the hand touch has obvious time to pursue. The timely application of jointing fertilizer can effectively prevent the excessive elongation of the base of the plant and cause lodging. However, if the leaf color falls prematurely at the jointing stage of wheat, the yellowing time is more than 7-10 days, the plant is thin, and the wheat field with few tillering should be applied to 5-7 days in advance; if the leaves are dark green, the leaves are covered. If the plant population is large and the tiller is still growing in the wheat field, it should be postponed for 7-10 days, and less or no quick-acting nitrogen fertilizer should be applied to avoid excessive inefficient tillering.
Second, the application of a suitable number of normal 8 leaves a heart of normal wheat seedlings, per 667 square meters area of ​​urea or potassium chloride 5-7.5 kg; 6-8 leaves around the thin wheat seedlings or late seeding delayed wheat, per 667 square meters area Topdressing urea 7.5-10 kg or ammonium bicarbonate 15-20 kg; more than 10 leaves of Wangchang wheat seedlings, should apply 5 to 7.5 kg of phosphate fertilizer and potassium fertilizer per 667 square meters area, less or not nitrogen fertilizer. For field plants such as thin wheat seedlings, late seedlings, late seedlings, and de-fertilized seedlings, quick-acting ammonium bicarbonate should be used in top dressing. Because ammonium bicarbonate is more effective than urea. After the urea is applied to the soil, it needs to be converted into ammonium carbonate or ammonium hydrogencarbonate by the urease secreted by the soil microorganisms before being absorbed and utilized by the crop. In the process of this conversion, it is greatly affected by the temperature conditions: generally 10 to 10 days at 10 ° C, and 4 to 5 days at 20 ° C to complete. In spring wheat topdressing, it is often delayed due to lower temperature and slower fertilizer efficiency. However, when applying ammonium carbonate, pay attention to the following two points:
1. Must be mixed with fine soil when applied. The amount of application is generally 20-25 kg per 667 square meters.
2, to be used in the morning after the dew is dry, in order to avoid damage.
Third, the method of chasing is appropriate If the wheat jointing fertilizer is applied to the dry season, it is generally recommended to use the ditching strip or the cave method, and immediately cover the soil after application to prevent the loss of fat. If the wheat jointing fertilizer is applied in continuous rainy season, the urea or potassium fertilizer should be applied to cover the shallow soil; if the manure and manure are applied, the application should be carried out by water drenching.
Author: Xue Yuhua Source: Hubei Science and Technology News
First, the application time is generally stopped in the first quarter of wheat, the beginning of the second quarter, the hand touch has obvious time to pursue. The timely application of jointing fertilizer can effectively prevent the excessive elongation of the base of the plant and cause lodging. However, if the leaf color falls prematurely at the jointing stage of wheat, the yellowing time is more than 7-10 days, the plant is thin, and the wheat field with few tillering should be applied to 5-7 days in advance; if the leaves are dark green, the leaves are covered. If the plant population is large and the tiller is still growing in the wheat field, it should be postponed for 7-10 days, and less or no quick-acting nitrogen fertilizer should be applied to avoid excessive inefficient tillering.
Second, the application of a suitable number of normal 8 leaves a heart of normal wheat seedlings, per 667 square meters area of ​​urea or potassium chloride 5-7.5 kg; 6-8 leaves around the thin wheat seedlings or late seeding delayed wheat, per 667 square meters area Topdressing urea 7.5-10 kg or ammonium bicarbonate 15-20 kg; more than 10 leaves of Wangchang wheat seedlings, should apply 5 to 7.5 kg of phosphate fertilizer and potassium fertilizer per 667 square meters area, less or not nitrogen fertilizer. For field plants such as thin wheat seedlings, late seedlings, late seedlings, and de-fertilized seedlings, quick-acting ammonium bicarbonate should be used in top dressing. Because ammonium bicarbonate is more effective than urea. After the urea is applied to the soil, it needs to be converted into ammonium carbonate or ammonium hydrogencarbonate by the urease secreted by the soil microorganisms before being absorbed and utilized by the crop. In the process of this conversion, it is greatly affected by the temperature conditions: generally 10 to 10 days at 10 ° C, and 4 to 5 days at 20 ° C to complete. In spring wheat topdressing, it is often delayed due to lower temperature and slower fertilizer efficiency. However, when applying ammonium carbonate, pay attention to the following two points:
1. Must be mixed with fine soil when applied. The amount of application is generally 20-25 kg per 667 square meters.
2, to be used in the morning after the dew is dry, in order to avoid damage.
Third, the method of chasing is appropriate If the wheat jointing fertilizer is applied to the dry season, it is generally recommended to use the ditching strip or the cave method, and immediately cover the soil after application to prevent the loss of fat. If the wheat jointing fertilizer is applied in continuous rainy season, the urea or potassium fertilizer should be applied to cover the shallow soil; if the manure and manure are applied, the application should be carried out by water drenching.
Author: Xue Yuhua Source: Hubei Science and Technology News
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