What is the effect of zinc fertilizer on rice? How to use zinc fertilizer? What are the precautions?

Zinc is one of the essential trace elements in plants. There are many zinc-deficient soils in China, and the effect of applying zinc to rice is significant, especially for rice. So what is the effect of zinc fertilizer on rice? How to use zinc fertilizer? What are the precautions?

What is the effect of zinc fertilizer on rice?

1. Nutrient managers play a role in coordinating the distribution of nutrient elements in crops, like the production leaders in rural areas in the past, allocating nitrogen, phosphorus and potassium to the parts needed by crops.

two。 Zinc participates in the respiration of crops and plays a certain role in the normal growth and respiration of rice.

3. Enhance the retrograde resistance of crops, especially frost resistance and cold resistance, and increase the application of zinc fertilizer to prevent rice from late spring cold and high temperature.

How to use zinc fertilizer?

1. Zinc fertilizer has a better effect on zinc-sensitive crops, such as corn, rice, peanuts, soybeans, sugar beets, bean, fruit trees, tomatoes and so on.

two。 Apply to zinc deficient soil: it is better to apply zinc fertilizer in zinc deficient soil, but not in zinc deficient soil. If the plant shows the symptom of zinc deficiency in early spring, it may be that the temperature in early spring is low, the microbial activity is weak, the fertilizer is not completely dissolved, the root activity of seedling is weak, and the absorptive capacity is poor; the antagonism of phosphorus and zinc and the influence of soil environment may be zinc deficiency. But at a later stage, when the temperature rises, the symptom disappears.

3. Use zinc fertilizer every other year: zinc fertilizer is used as base fertilizer about 25kg zinc sulfate per hectare, which should be applied evenly and every other year, because the residual period of zinc fertilizer in the soil is longer, so it is not necessary to apply it every year.

What are the points for attention in the use of zinc fertilizer in rice?

1. It can only be applied in zinc-deficient rice fields. In general, calcareous soil is rich in calcium and has high PH value, and available zinc is easy to combine with carbonate or hydroxide to form zinc carbonate or zinc hydroxide precipitation, so it is often deficient in zinc; the paddy field with strong reduction is easy to lack zinc; in the paddy field with long-term application of nitrogen and phosphorus fertilizer, the available zinc will also decrease. Zinc fertilizer should be applied to the above types of paddy fields.

two。 Apply it in moderation. Zinc sulfate is mostly used to apply zinc fertilizer in paddy field, generally applying 1-1.5kg per mu. Because zinc fertilizer has obvious after-effect, the zinc fertilizer applied in the first season can still increase the yield of rice in the next season, so zinc fertilizer does not need to be applied every year, generally applied once in 2-3 years.

3. Zinc fertilizer should be applied early. The application of zinc fertilizer in seedling field has high utilization rate and good effect. It can be either base or sprayed. It is best to apply zinc fertilizer in the field when raking the field.

4. Apply evenly. In order to spread zinc fertilizer evenly, zinc fertilizer can be mixed with physiological acid fertilizer. However, zinc fertilizer should not be mixed with phosphate fertilizer to avoid the formation of zinc phosphate which is difficult for rice to absorb and use and reduce the fertilizer efficiency.

5. The concentration of foliar spraying should be suitable. Spraying zinc fertilizer as foliar fertilizer is the main method of topdressing, and the suitable concentration is 0.1% Mel 0.2% zinc sulfate solution. The seedling field should be sprayed at the 3-leaf stage and 3-5 days before transplanting. The field should be sprayed after slow seedling transplanting or 10-15 days after transplanting, and it is better to spray 2-3 times continuously.