What should be paid attention to in foliar fertilization of rice?
What should be paid attention to in foliar fertilization of rice? Please guide foliar fertilization has the advantages of low dosage, strong pertinence, fast absorption, obvious effect, low cost and so on. At present, it is the vegetative growth period of rice, how to promote the rapid growth of roots, stems, leaves and tillers of rice, the author reminds the broad masses of farmers to pay attention to the following six aspects when applying foliar fertilizer to rice: it is necessary to select the corresponding foliar fertilizer according to the fertilizer demand characteristics of each growth stage of rice. For example, nitrogen fertilizer should be the main fertilizer in the new bud stage, and potash fertilizer should be added at the same time; potash fertilizer should be applied at seedling stage to cultivate strong seedlings; phosphate fertilizer should be supplemented at booting and flowering stage to make grains full. If the concentration of rice foliar topdressing is appropriate, the concentration must be controlled well. When using it, it is necessary to strictly follow the relevant instructions, generally 500 to 800 times liquid is appropriate, and it is strictly forbidden to increase the concentration at will to prevent fertilizer damage or toxicosis. Especially for trace element fertilizers, the critical range of rice from lack to excess is very narrow, and the concentration should be strictly controlled. If the time is suitable for foliar topdressing, it is best to choose sunny morning or evening, under the condition of no wind. Methods Rice is a monocotyledonous plant with relatively small leaf area, large intercellular space and more pore cells on the back of the leaf, and it is easier to absorb fertilizer solution than the front of the leaf, so it is necessary to try to cover both the positive and negative sides of the leaf evenly with solution. Of course, the amount of spraying can not be too large, rice leaves without dripping water is better, generally spraying 50-60 kg fertilizer per mu. The times should be reasonable, the concentration of foliar topdressing of rice is lower, and the absorption amount of each spraying is less, so the times of foliar topdressing should not be less than 2-3 times. The properties of pesticides should be made clear before the mixed spraying of medicine and fertilizer. If the two are opposite in nature, they must not be sprayed together. When preparing the mixed solution, be sure to stir evenly and mix it now. Generally, the fertilizer is prepared into an aqueous solution first, and then the pesticide is directly added to the prepared fertilizer solution according to the dosage, shaken well and sprayed. Click to get massive rice planting technology click to get massive grain planting technology
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Why do rice leaves turn yellow?
Why do rice leaves turn yellow? Please introduce that yellowing of rice leaves is a common phenomenon. The main symptoms are as follows, which should be carefully identified and prevented. 1. Toxic yellowing ① hydrogen sulfide poisoning. The root system is black and smells of rotten eggs, the white roots are few and thin, and the old leaves at the base are yellow.
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What should be paid attention to when soaking rice seeds with medicament?
What should be paid attention to before and after rice harvest? Please introduce the following four points that should be paid attention to before and after rice harvest. 1. Drainage as early as possible. Drain the paddy fields as much as possible, and dig trenches to dry the lowlands as early as possible if necessary. two。 Ripe for harvest. Manual harvesting controls that more than 95% of rice glumes turn yellow in the field.
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