In the process of rice planting, if you want to achieve high yield, you must master the scientific method of fertilization. Among them, foliar spraying is a crucial part. Foliar fertilizer is better for the supply of rice nutrients and the effect is better. What are the spraying time and precautions? Let's understand together!
1. Rice leaf spraying time
1. Tillering period: The tillering period of rice is 45 days after sowing. At this time, foliar fertilizer was sprayed to promote the growth of low-noise tillers and play a role in increasing ears.
2. Heading stage: The heading stage of rice is when the inverted two leaves begin to emerge. This time is the basic period of panicle formation and grain development. Ineffective tillers should be controlled. It can be sprayed with nitrogenous foliar fertilizer, or top dressing urea.
3. Grain stage: The grain stage of rice ranges from earing to maturity. At this time, foliar top dressing can quickly increase the unit weight of rice grains and increase the yield of seedlings. The main application of potassium dihydrogen phosphate solution is 50-60 kg, once every 15 days, and stop top dressing one week before harvest, which can significantly increase rice yield.
2. Matters needing attention in rice foliar spraying
1. Pay attention to the selection of fertilizer types
Urea, potassium dihydrogen phosphate, superphosphate, potassium sulfate and some soluble micro-fertilizers are foliar fertilizers, but insoluble fertilizers such as ammonium carbonate and potassium chloride, nitrogen fertilizers containing volatile ammonia, etc. are not suitable for rice foliar. fat.
2. Grasp the fertilizer concentration
The spraying concentration of rice at different stages is different. For example, foliar spraying of urea and potassium dihydrogen phosphate requires the use of water for concentration dilution. The spraying concentration is 1%, and the concentration of trace element spraying is generally 0.01-0.1% .
3. Foliar spraying method
It is generally sprayed in the evening or in the morning with dew, sprayed on the front of the leaves, so that the fertilizer liquid can stay on the surface of the leaves for a longer time to facilitate absorption; when spraying fertilizers, keep the field with mixed soup or wet. If the leaves are sprayed with fertilizers in hot weather, they need to be sprayed with clean water once to wash the leaves.
4. Foliar spraying time
Foliar fertilizers can be sprayed during the whole growth process of rice, but the spraying concentration is different in different periods. The application concentration is lower in the seedling stage, and the application concentration should be increased during the growth and decline period.
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