First, determine the amount of fertilizer in millet in Shandong province to the main valley, in the case of high-yield, for each production of 100 kilograms of grain, need to absorb pure nitrogen 2.5 to 3 kilograms, phosphorus pentoxide 1 to 1.2 kilograms, potassium oxide 4 to 5 In kilograms, the amount of fertilizer needed can be calculated based on the output index. According to current production experience, under medium fertility conditions, 2000 to 2500 kg of organic fertilizer, 15 to 20 kg of urea, and 40 to 60 kg of superphosphate can be applied per 667 square meters (1 mu). The application of potash fertilizer varies from soil to soil, and fluvo-aquic soil and cinnamon soil generally contain more potassium. Potassium fertilizer may not be applied under conditions where sufficient organic manure is used, and brown soil is supplemented with potash fertilizer. With the continuous increase of biological production throughout the year, land that has not previously been depleted in potassium will suffer from potassium deficiency due to the increase in output. If the former crops have insufficient potassium, about 15 kg of potassium sulfate per 667 square meters can be used as a supplement. Sand, sandy loam and loess soil are prone to boron deficiency. Pay attention to the application of boron fertilizer. Second, fertilization technology Phosphorus, potassium fertilizer is not easy to lose, can be used as a base fertilizer, if used as top dressing should be applied as soon as possible. Nitrogen fertilizers have poor stability and are fast and short-term fertilizers. Therefore, they should be applied in phases and be deeply buried. 1. Base fertilizer and seed fertilizer. The application of basal fertilizer is the basis for achieving high yields of millet. All organic fertilizers, phosphate fertilizers, potash fertilizers, trace fertilizers, and approximately 1/3 of nitrogen fertilizer can be used as the base fertilizer. The application of seed fertilizer is also an effective measure to increase production. It uses about 3 kg of diammonium phosphate or urea per 667 square meters and is applied in the ditch with the seed when sowing. If the soil is dry, pay attention to reducing the amount of seed fertilizer and properly separate the seed from the fertilizer so as not to affect seedling emergence. 2. Joint fertilizer. The medium and low fertility conditions and fertilizer-free plots should be topdressed immediately after jointing. Fertilizer accounted for 45% to 50% of the total nitrogen fertilizer. Areas with short frost-free periods and varieties with long growth periods should be applied early and replanted with joint-fertilizer in order to avoid late-maturing glutinous rice. Good soil fertility and high-yielding pediculous fields should be lightly applied to joint-fertilizer, and jointing fertilizer accounts for less than 30% of total nitrogen. Simplified cultivation can combine the jointing fertilizer and panicle fertilizer into one application. The fertilizer application time is later than the jointing fertilizer but not later than the booting period. 3. Panicle fertilizer. Panicle fertilizer is applied 7 to 10 days before heading. High-yielding fields must increase the amount of panicle fertilizer. Use 40% to 50% of total nitrogen as panicle fertilizer, and low-yield fields use 20% to 25% of total nitrogen as ear. fat. Spike fertilizer can be combined with cultivator soil and watering. If there is a phenomenon of defertilization during the flowering period of millet, a small amount of nitrogen fertilizer should be applied in combination with watering. In particular, sand soil with poor fertility must be increased in fertilizer frequency and fertilizer should be added at any time. During the grain filling period, the method of spraying fertilizer by root can be applied as appropriate. Spraying 0.5% to 1% of urea solution or 0.2% of potassium dihydrogen phosphate solution, spraying 50 to 60 kilograms per 667 square meters, can extend the functional period of the leaves and increase the grain size. weight. 4. Leaf spray boron. When boron is sprayed on the leaves, the concentration, amount, spraying time, and frequency of the boric acid solution must be correctly applied. With 300 ~ 400 mg / kg concentration of boric acid solution, sprayed 1 week before the panicle, 100 kg of boric acid solution per 667 square meters, interval 10 days can be sprayed again.
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