Usage of potassium dihydrogen phosphate on corn:

Maize needs to absorb 3.43kg of hydrogen, 1.23 kg of phosphorus pentoxide and 3.26 kg of potassium oxide for every 100kg of maize grain production. Fertilization should be balanced with nitrogen, phosphorus and potassium.

Base fertilizer :2000 kg ~3000 kg organic fertilizer, all phosphorus fertilizer, one third of nitrogen fertilizer, all potassium fertilizer as base fertilizer. It can be combined with furrow and furrow once applied into the seeding ditch, so that the fertilizer is applied to the tilling layer of 10 cm - 15 cm.

Fertilizing: Fertilizing is the most cost effective method of fertilization. There are many kinds of fertilizer application methods, such as: seed mixing, seed soaking, strip application, acupoint application. For seed mixing, humic acid, biological fertilizer and micro fertilizer can be selected. Dissolve the fertilizer and spray it on the corn seeds. Spray and mix it to evenly stick the fertilizer solution on the surface of the seeds. Soak seeds: Soak seeds in a solution of 0.2%, 98% potassium dihydrogen phosphate for 12 hours, dry in the dark and then sow.

Top dressing leaves two thirds hydrogen fertilizer for top dressing. Top dressing is divided into seedling fertilizer, rod fertilizer, spike fertilizer and grain fertilizer four periods of top dressing, and the following three periods as the focus;

Rod fertilizer: Top application within 10 days after jointing can promote stem growth and young panicle differentiation. One third of the nitrogen fertilizer in topdressing is jointed fertilizer, combined with tillage, the distance between fertilizer and seedling is 5 cm ~7 cm. Spraying 0.2-0.3% potassium dihydrogen phosphate 2-3 times at jointing stage could increase maize yield by more than 10%.

Ear fertilizer is the most important topdressing for high maize yield. Generally about 10 days before heading, that is, the big horn period of topdressing, about 20 kg urea per mu, and 400 grams of potassium dihydrogen phosphate with water about 50 kg foliar spraying. No matter whether spring or summer corn, heavy application of ear fertilizer can achieve significant yield increase.

Grain fertilizer refers to the fertilizer applied before and after maize pollination, the application of grain fertilizer can prolong the time of leaf photosynthesis, prevent premature aging of roots and leaves, promote grain-filling, increase grain weight, generally 5 kg urea per mu topdressing, can also be used 0.5 kg urea plus 250~400 grams of potassium dihydrogen phosphate water 50 kg spray.

Sweep the phone to open the current page