When is it good to apply leaf fertilizer to rice?

When is it good to apply leaf fertilizer to rice? Please introduce in detail that the application of foliar fertilizer in the middle and later stages of rice growth can increase grain and weight, generally increase yield by 5% to 10%, and improve quality. Therefore, the following foliar fertilizer can be selected according to the conditions. Grain-saturated rice was sprayed on leaves after fully dissolving and stirring 50 kg of water at heading stage and milk stage respectively. Grain satiety can be mixed with pesticides to control diseases and insect pests, but not with alkaline pesticides and other alkaline substances. Must choose the rainless weather, after the dew dries, uses the sprayer to spray the fine spray evenly on the rice leaf, along with the use, within 6 hours after spraying, it will be sprayed again in case of rain. It is strictly forbidden to spray full grains on greedy green and late-maturing seedlings before heading and in the later stage of rice heading. Potassium dihydrogen phosphate and urea rice leaves can maintain a certain nitrogen level in the later stage, which is beneficial to prevent premature senescence and improve the seed setting rate, as well as the lack of phosphorus and potassium in the plant. Foliar spraying of potassium dihydrogen phosphate and urea in the later stage of rice is beneficial to prolong the functional period of canopy leaves. The leaves were sprayed with 0.3% potassium dihydrogen phosphate and 0.5% urea respectively at full heading stage and about 7 days after full heading. "1992 ○" is a kind of plant growth regulator, which can supplement hormones and maintain growth function. Proper application of "92 ○" in the later stage of rice is beneficial to prevent premature senescence and prolong leaf photosynthesis. At the same time, it can also promote full panicle and reduce the neck of hybrid rice. When rice heading 20% to 30%, 1 gram of "92 ○" powder (for a small amount of strong wine) or 25 ml of EC was sprayed on 50 kg of water, and 0.3% potassium dihydrogen phosphate was added. Pay attention to strict control of the dosage, green madness growing seedlings and poor lodging resistance varieties (combinations) can not use "920", and it is strictly forbidden to use "1992 ○" before heading. Multi-element advanced compound fertilizer contains nitrogen, phosphorus, potassium, sulfur and iron, boron, manganese, copper, zinc, molybdenum, magnesium and other trace elements. Spraying at the initial heading stage of rice can increase the number of effective panicles, seed setting rate and grain weight. At the initial heading stage of rice, 50 kg of water was sprayed with 8: 10 packets per mu (20 grams per packet). Rare earth is the general name of lanthanum, cerium, praseodymium, neodymium and other 17 elements. The application of appropriate amount of rare earth can improve the root activity, promote the absorption of nutrient elements by crops, and increase the content of chlorophyll in leaves. The rice was foliar sprayed with 0.03% rare earth solution from the break to the first heading stage. At the early heading stage of rice with triacontanol, foliar spraying with 5% triacontanol solution and 0.3% potassium dihydrogen phosphate can improve the seed setting rate and grain weight of rice. Click to get more rice planting techniques click to get more food crop planting techniques