Grain fertilizer refers to the top dressing applied after heading rice. After heading rice, the nitrogen content in leaves decreased, photosynthetic capacity decreased, and it was prone to premature aging and death. The application of granular fertilizer can increase the nitrogen content of leaves, extend its functional period, and increase photosynthetic products. Therefore, we must pay attention to the application of late grain fertilizers, and have good effects on ensuring grain filling, improving rice quality, and promoting ripening. Therefore, mastering the scientific application of granular fertilizer has a very important role in the cultivation of high-quality rice.
First, scientific application of granular fertilizer
1, grain fertilizer should see seedlings, see the days of discretion to use the specific application of time and conditions should be determined according to the characteristics of changes in leaf color characteristics. Seedlings are not yellow, not rainy days; leaf color fades, the weather more clear and good granules effect is obvious; for the late top dressing, should apply fertilizer, such as leaf color, plant type open, flag leaves upright, between rows Clear, the field by the light is good, the base of the stem, Ye Qingxiu, you can apply fertilizer. However, it is not appropriate to apply granular fertilizer to the groups that are not clear in the early stages (field blocks).
2. Method of Application The method of external fertilization is generally used for granular fertilizers. The extra-root fertilizer means that the roots of rice are not absorbed in the paddy field, and the organs (spray or append) other than the root (stem, leaf, ear) are mainly used. On the leaves), the method of letting rice plants absorb nutrients. Fertilizers commonly used are urea and potassium dihydrogen phosphate, which can be sprayed with 0.5 -1 kg of urea plus 60 kg of water. It is better to use granular fertilizer in the evening or in the morning, especially when the roots are topdressed during the heading and flowering period of rice, and the flowering time (9:00-12:00) must be avoided when applying.
First, scientific application of granular fertilizer
1, grain fertilizer should see seedlings, see the days of discretion to use the specific application of time and conditions should be determined according to the characteristics of changes in leaf color characteristics. Seedlings are not yellow, not rainy days; leaf color fades, the weather more clear and good granules effect is obvious; for the late top dressing, should apply fertilizer, such as leaf color, plant type open, flag leaves upright, between rows Clear, the field by the light is good, the base of the stem, Ye Qingxiu, you can apply fertilizer. However, it is not appropriate to apply granular fertilizer to the groups that are not clear in the early stages (field blocks).
2. Method of Application The method of external fertilization is generally used for granular fertilizers. The extra-root fertilizer means that the roots of rice are not absorbed in the paddy field, and the organs (spray or append) other than the root (stem, leaf, ear) are mainly used. On the leaves), the method of letting rice plants absorb nutrients. Fertilizers commonly used are urea and potassium dihydrogen phosphate, which can be sprayed with 0.5 -1 kg of urea plus 60 kg of water. It is better to use granular fertilizer in the evening or in the morning, especially when the roots are topdressed during the heading and flowering period of rice, and the flowering time (9:00-12:00) must be avoided when applying.
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