First, the main attack culm
Before the sowing of maize seedlings into the small bell-mouth period, the main stage was vegetative growth. Generally, early-maturing varieties were unfolded in 5-6 leaves, medium-maturing varieties were unfolded in 7 leaves, and tassel growth cones began to elongate. For an optimal fertilization period, the amount of fertilization accounts for about 30% of the total fertilization. At this time, sufficient fertilizer and water are the key to promoting the early and stable growth of strong seedlings and lay a good breeding shelf.
Second, heavy ear fertilizer
Before the heading of corn, it is the period of big bell-mouth, which is the vegetative and reproductive growth stage. At this time, the 11th leaf of maize is unfolded, and the plant has formed about 60%. The tassel has already begun the floret differentiation, which is the number of maize ear grains. The critical period, when sufficient fertilizer and water is conducive to the increase in the number of corn grains, is another crucial period for corn fertilization. The amount of fertilizer accounts for about 60% of the total amount of fertilizer, mainly nitrogen fertilizer, and it is also important to supplement a certain amount of potassium fertilizer. At this time, if the fertilizer supply is insufficient, it will inevitably result in large plants, small ear, and low yield.
Third, Qiao applied fertilizer
In the tassel flowering period, when the maize is pollinated, the stems basically stop growing and have entered the main stage of reproductive growth. At this time, for corn with insufficient fertilizer supply or with defertilization after heading, a grain attack fertilizer should be applied. Middle-level plots and late-maturing varieties are particularly important. Fertilization accounts for about 20% of total fertilization. Drought watering ensures sufficient fertilizer and water in the later stage to prolong the functional period of the leaves, which is conducive to the synthesis, operation, and storage of nutrients to the grains, achieving the goal of high grain-to-grain grain filling. Http://
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