Summer corn "three attack" fertilization method

It is very important to strengthen the management of fertilizers and water after the summer corn grows from sowing to the beginning of jointing. Farming Road: "Three minutes, seven minutes, scientific application of fertilizer and water is the key." Practice has proved that if we want to achieve scientific management of fertilizers and waters, implement the "three attack" fertilization method, that is, the use of stalk shank fertilizer, attacking panicle fertilizer and attacking granule fertilizer.

The first is stalk stalk manure. Before the seedlings are sown to the small bellmouth stage, the vegetative growth is the main stage. Generally, early maturing varieties begin at 5 to 6 leaves, medium maturing varieties begin at 7 leaves, and the tassel growth cone begins. Elongation is one of the best fertilization periods for corn. The amount of fertilization accounts for about 30% of the total fertilization. At this time, sufficient fertilizer and water are the key to promoting strong and early seedling growth and to lay a good breeding shelf.

The second is attacking panicle fertilizer. Before the corn heading, it is the big bell-mouth period, which is the vegetative and reproductive growth stage. At this time, the 11th leaf of the maize is unfolded and the plant has formed about 60%. The tassel has already started floret differentiation. It is a critical period for the formation of corn ear number, and if the fertilizer and water are sufficient to increase the number of corn grains, it 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 is insufficient, it will inevitably result in a large plant, a small ear, and a low yield.

The third is attacking grain-fertilizer. During 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 deferred fertilizer after heading, an attacking grain fertilizer should be applied. Fast and late-maturing varieties in the middle producing areas are particularly important. The amount of fertilizers accounts for about 20% of the total amount of fertilizers. 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.

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