Rural summer maize fertilization principle

In recent years, farmers have applied a large amount of misuse of base fertilizer and diazo-light potassium in fertilization on corn. According to the growth characteristics of corn and the law of fertilizer demand, as well as the trials and conclusions in recent years, it is recommended that corn fertilization should follow the re-application. high-end fertilizer and top dressing and so the combination of the following principles in order to make the production of corn to maximize the increase, to reap the greatest benefits.  

    1 , the standard of corn bottom fertilization

     According to the fertilizer requirement and fertilizer requirement of corn growth, compound fertilizer with high nitrogen, low phosphorus and high potassium should be used. Generally, the nitrogen content is about 20 %, the phosphorus content is about 10 %, and the potassium content is about 15 %. It is not suitable to use nitrogen. A compound fertilizer with balanced phosphorus and potassium is used as a base fertilizer. In addition, according to the fertilizer requirement and fertilizer characteristics of corn, the use of high potassium fertilizer can increase the stress resistance of corn and promote the weight gain of corn in the late stage, so as to achieve the purpose of increasing yield.

    2 , should be combined with heavy fertilizer and corn long-term topdressing

      Applying the base fertilizer once, because the corn growth period is longer, it will cause the corn to be de-fertilized in the later stage, which will affect the yield. In addition, the one-time application of the base fertilizer, the large amount, easy to burn the seedlings will affect the corn seedlings, so corn base fertilizer and top dressing should be combined. Generally, 20 to 25 kg of high-quality compound fertilizer is applied per acre . In the corn growing season, 20 kg of urea is applied. This kind of fertilization can not only ensure the nutrient demand of the whole growth period of corn, but also not easy to cause burning, which can increase corn yield and reduce nutrient loss.

    3 , NPK balanced compound fertilizer is not suitable as a base fertilizer

    The amount of nitrogen, phosphorus and potassium required for any crop will not be balanced. Therefore, the application of nitrogen, phosphorus and potassium balanced compound fertilizers will result in one of the excess nutrients, causing nutrient waste and inhibiting crops. The absorption of other nutrients does not achieve a good fertilization effect, and the input is increased.

   4 , the bottom fertilizer is best not to apply diammonium phosphate alone

    Fertilization at the bottom of corn belongs to ternary compound fertilizer, which contains three elements of nitrogen, phosphorus and potassium and some trace elements, while diammonium phosphate belongs to binary compound fertilizer, which only contains nitrogen and phosphorus. Maize growth needs nitrogen, phosphorus, potassium, three kinds of elements, and potash demand is large, the choice should be selected higher corn potassium fertilizer NPK. If diammonium phosphate is applied, it is best to use it in combination with potassium.

    5 , the spacing of fertilizer and seeds when corn is planted

    The interval between fertilizer and seed should be determined according to the nitrogen content of the fertilizer. Generally, the nitrogen content is about 20 %, the interval is 5 to 7 cm , the nitrogen content is about 25 %, the interval is 10 to 12 cm , and the minimum is not less than 5 cm .