Spring maize fertilization plays an important role in the growth of corn in the whole season. Fertilization in this season is also very important. Today, Xiao Bian shares with you the following four points about the rational fertilization of spring corn:
(1) To determine a reasonable proportion of nitrogen, phosphorus and potassium fertilizers, and strive to balance fertilization. Maize absorbs more nitrogen, more potassium and less phosphorus throughout its life. Absorption of nitrogen, phosphorus, potassium ratio is generally 100: 37: 84, combined with higher nitrogen, potassium utilization, phosphorus utilization is low, in the fertilization should focus on nitrogen, appropriate amount of phosphorus, potassium, suitable The proportion of nitrogen, phosphorus and potassium applied is roughly 100:60:40, and the formula fertilization will be implemented. Firstly, corn fertilization index system under different fertility levels was formulated according to the requirements of fertilizer, soil fertility and fertilizer effect of maize and field experiments and soil test results. Based on this, formulate fertilization partition maps and formula fertilization plans.
(2) To determine a reasonable amount of fertilization, to produce fertilizer, to fertilize the soil fertility, 1 kg of nitrogen, phosphorus, potassium and pure nutrients can increase production of 8-10 kg of grain, generally every 100 kg of grain, soil The production capacity is calculated as 60%, requiring 3.43 kg of pure nitrogen (converted to 46% urea 7.5 kg), phosphorus 1.23 kg (converted to 16% superphosphate 7.7 kg), potassium 2.36 kg (converted to 60% potassium chloride 3.9 kg) .
(3) The frequency of fertilization should be scientifically formulated, and every time the fertilizer supply should be made effective and reasonable, the fertilizer, seed fertilizer, and top dressing should be used in conjunction with the application. According to the actual situation in our county, general base fertilizer can be applied to the application of 1000-1500 kilograms of organic fertilizer on the basis of 15 N 15 P-15 Potassium (general type), 20 N 15 P 5 Potassium (middle or more fertile) ) Or 16 nitrogen-12 phosphorus-12 potassium (low or lowly) 20-25 kg, large bell-mouth topdressing urea 20-25 kg, head urea 10-15 kg. In order to meet the demand for nutrients in different growth periods, prevent the defertilization to reduce waste and make the fertilizer play a greater benefit.
(4) Reasonable fertilization method should be adopted to effectively avoid the harm of fertilizer and to exert the fertilizer effect. The application of base fertilizer should be combined with organic fertilizer and chemical fertilizer. The fertilization method can be applied before arable land can also be combined with deep turning.
The seed fertilizer should be strictly separated from the seed or strictly limited to diammonium phosphate. The application amount of mu is less than 5 kg, and it can be mixed with the corn seed.
Top dressing should be at the jointing-booting stage, ie small bell-mouth-big bellmouth period (9-12 leaves), 10-15 cm from the base of the stem, and the mechanical side applied to a depth of 10-15 cm, or man and force storage trenches. Article Shi, cave facilities and timely cover soil.
The four main points of rational corn fertilization for spring corn are shared here with everyone. I believe we all have our own understanding and hope to help everyone.
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