When is the best time to fertilize rice with potash?

The suitable time for applying potassium fertilizer to rice is tillering stage, spikelet differentiation stage and booting stage, which can effectively increase the seed setting rate of rice, reduce pest and disease disasters and improve yield. The combination of phosphate fertilizer and nitrogen fertilizer can give full play to the potassium chasing effect, in which the ratio of nitrogen, phosphorus and potassium is 1:

Advisable. > 1. When is the best time to fertilize rice potassium fertilizer?

2. Young panicle differentiation period: After rice enters the young panicle differentiation, it is the second peak period of fertilizer absorption, and potassium fertilizer can be applied reasonably at this time.

3. Booting stage: Applying potassium fertilizer (such as trium potassium dihydrogen phosphate fertilizer) during booting can improve the fruit setting rate, resist lodging, and reduce pests and diseases.

Second, the method of applying potassium fertilizer to rice.

1. Follow the principle of "four more and four less", that is, apply more to fields with less potassium content, and vice versa; More application for early rice and less application for late rice; More application for tall stalks and less application for dwarf stalks; Hybrid rice.

Apply more, apply less for conventional rice.

2. The combination of phosphate fertilizer and nitrogen fertilizer can give full play to the potassium chasing effect, of which the ratio of nitrogen, phosphorus and potassium is 1: is appropriate.

The best time for potassium fertilization of rice is at the rice tillering stage, young panicle differentiation stage and booting stage, which can increase the seed setting rate of rice, reduce the damage of diseases and pests, resist lodging, and improve rice yield.

Potash decomposition accelerates in high temperatures and sunlight, and the best time to apply potassium fertilizer to rice is in the early morning on a cloudy day.

Experience has proved that the first 25 days of full heading is a better application period for ear fertilizer. Before top dressing, irrigate 3-5cm deep, plug the upper and lower water inlets, and flatten. It will be managed normally after 4-5 days.

On rainy days, overgrown rice fields do not need ear fertilizer. From the perspective of leaf age, 11-leaf, 12-leaf and 13-leaf rice varieties, when the top two leaves are exposed and the top two leaves are halfway grown, it is a better time to apply booting fertilizer. The application time of fertilizer at booting stage can also be determined by the method of ear picking.

Pull out the main stem, and when the booting length inside the main stem reaches the length, apply booting fertilizer in time! For 1-12 leaf varieties, most of them are fertilized on July 2-10, and the stems and leaves above the main stem are removed. If a young spikelet is formed, the leaves covered with young spikes are flag leaves, and the leaves covered with flag leaves are inverted bilobes.

When the tips of the 2 leaves are exposed, most of them can be fertilized.

There are two best stages of rice potassium fertilization, one is applied once after 20 days of transplanting, which is beneficial to the growth of grass; The second is 15 days before the harvest, which is beneficial to the fullness of the grains.

It depends on the specific situation, in general, it is before it blooms, and it is best to use it at this time to achieve a very good effect.

1. Apply potassium fertilizer at the seedling stage. Seedlings can be raised with 3 to 4 kg of potassium chloride per mu plus 300 to 400 kg of moist nutrient soil mixed with nitrogen and phosphorus fertilizer for suitable ridge picking, and applied as seedling base fertilizer.

2. Pick and apply potassium fertilizer at the tillering stage. After transplanting seedlings and before drying the field, 2 to 7 kg of potassium chloride per mu is generally applied.

3. Apply potassium fertilizer at the stage of spikelet differentiation. Potassium fertilizer can be applied according to the early growth of rice at the differentiation stage of young panicles.

4. Potassium fertilizer is applied at booting, milk ripening and yellow maturity stage. The booting to yellow ripening period can be quantified according to soil fertility, climate change, plant growth status and target yield.

5. Apply potassium fertilizer outside the roots. The effect of extra-root topdressing in the yellow maturity stage of rice can be more obvious in Yingliangchang.

Hello dear! Potassium fertilizer is a very important nutrient in the growth process of rice, which can improve the nutritional quality, increase yield, disease and stress resistance of rice. The application time of potassium fertilizer should be determined according to the growth needs of rice and the condition of the soil.

Generally speaking, the growth period of rice is divided into different stages, including the early growth stage, tillering stage, jointing stage, panicle stage, grain filling stage and maturity stage. The timing of potassium application should be determined based on the biological needs and fertilizer uptake during each growing period. Proper application of potassium fertilizer in the early growth stage and tillering stage of rice is helpful to improve the root development and stem and leaf growth of rice, and increase the quality and quantity of stems and leaves, thus laying a good foundation for the yield in the later stage.

In the heading stage and grain filling stage of rice, the growth of rice has entered a critical period, which is the peak period of potassium absorption by rice. Therefore, at this time, the application rate of potassium fertilizer should be appropriately increased to promote the development of rice flowers, rice, husks and other parts, increase the number and weight of rice grains, and ultimately improve the yield of rice. In general, the appropriate application of potassium fertilizer at all stages of rice growth is helpful to improve the quality of nutrients, increase yield, and resist disease and stress.

At the same time, while applying potassium fertilizer, attention should also be paid to the rational application of other fertilizers, such as nitrogen fertilizer, phosphate fertilizer, etc., in order to achieve the best fertilization effect.

The nutrient content of the plots is different in different rice planting areas, especially the plots with relatively large viscosity in the south, which are relatively acidic, so the potassium content in the soil is low.

Before planting rice, it is necessary to apply foot fertilizer, and potassium fertilizer cannot be lacking in the base fertilizer, so an appropriate amount of potassium fertilizer is needed.

Potassium deficiency in rice is characterized by reddish-brown spots on leaves, slow plant growth, reduced tillering, poor root growth, short plants, and slender stems. After this situation occurs, it is necessary to take measures in time, otherwise it will affect the later growth and yield of rice.

For the paddy field in this case, potassium fertilizer must be applied in time, potassium chloride fertilizer can be selected, generally about 6 kg per mu, and timely field irrigation is carried out to promote the absorption of fertilizer by rice and the recovery of roots.