When is the time for rice foliage fertilizer to be used at high temperature?

Foliar fertilizer can be sprayed at big embryo, initial heading, grain filling and full heading stage, and before morning and after 4 o'clock in the afternoon at heading and flowering stage, while before 11:00 and after 4 pm on sunny day, the suitable temperature for foliar fertilizer spraying is 8-25 ℃.

I. timing of spraying foliar fertilizer on rice

Foliar fertilizer can be sprayed at large embryo, initial heading, grain filling and full heading stage, in which heading and flowering stage should be sprayed before morning and after 4 o'clock in the afternoon, while in large embryo and filling stage, spraying before 11:00 in the morning and after 4 o'clock in the afternoon can be chosen, and the optimum temperature for spraying foliar fertilizer is 8-25 ℃.

2. the method of spraying foliar fertilizer on rice

1. Need foliar fertilizer 35g, then mix it with water 15-20kg (each brand has a different amount of water), dissolve and stir it fully.

2. Use the equipment with good spraying effect, spray it evenly on the leaf surface of rice, and pay attention not to spray it back and forth, which is helpful to avoid excess nutrients.

3. During the period, it is necessary to master the spraying time, and after each spraying, it can be sprayed again every 10-15 days, which is beneficial to the full absorption of nutrients by the plant.

Matters needing attention in spraying foliar fertilizer on rice

1. Processing liquid fertilizer

(1) all kinds of available nitrogen, phosphorus and potassium fertilizer, potassium dihydrogen phosphate, triacontanol, silkworm manure, borax, human and animal urine, etc., can be used as foliar fertilizer, and the dosage per mu is small, so it needs to be processed into liquid fertilizer first.

(2) the first day before the application of quick-acting chemical fertilizer, it is necessary to dissolve with 5-10 times of water to prevent more withered leaves from being sprayed. Human and animal urine should first be put in the pool for maturity, and silkworm feces can be dissolved with 10 times of water. After 24 hours of filtration, and then mixed with enough water for spraying, borax needs to be sprayed crushed first, and then fully stirred into a thick liquid with a small amount of water, and then sprayed with sufficient water.

2. Skills

The preparation of the solution should be uniform, the fog point should be fine when spraying, and the number of spraying should be determined according to the growth of rice.

3. Concentration

The main results are as follows: (1) the concentration of foliar fertilization is directly related to the effect of spraying, mainly because of different fertilizers and crops. If the concentration of foliar fertilizer is too high, it will easily burn rice leaves, but if it is too low, it will not achieve the effect.

(2) if rice foliar fertilizer is used properly, it can effectively improve plant disease resistance and yield, so we must follow the instructions and adjust according to the actual situation, and remember not to apply it blindly.

IV. Benefits of spraying foliar fertilizer on rice

1. Foliar fertilizer can improve crop microcirculation, promote root growth and development, improve nutrient and water absorption, enhance photosynthesis, and promote the synthesis of protein and chlorophyll.

2. It can also increase effective tillers, robust plants, resist low temperature and lodging, effectively prevent physiological diseases, enhance pollen vitality, increase pollination rate, increase effective panicle rate and 1000-grain weight, reduce shrunken grains and diseased grains, and make rice mature more than 7 days earlier and increase its yield by 20-30%.