First, storm attack panicle fat. Maize ear fertilizer is corn dressing 10 days before tasselling, which is close to the big bell-mouth period. In this period, corn has the fastest vegetative and reproductive growth rates. Young panicle differentiation is the key to determining the size of the ear and the number of grains. It is also the stage where the amount of fertilizer is the most needed in a lifetime of corn. 50-60% of the total amount of top-dressing fertilizer, so called the critical period of corn fertilizer. Especially for low- and medium-yield plots and later-stage de-fertilizer plots, it is necessary to storm the panicle fertilizer and increase the amount of topdressing fertilizer. Apply 25-30 kilograms of ammonium bicarbonate to Mushi and apply appropriate amounts of phosphorus, potassium, and zinc fertilizers to benefit the strong stalks. , increase grain full tip.

Second, intervene. When corn has just emerged from the tassel and no pollen has been distributed to the outside, one row of tassels (also emasculated) can be removed every other row. After detasseling, the saved nutrients are concentrated to supply the ear, so that the ear can be spit in advance, and the male and female flowering are encouraged to meet to increase the pollination rate, thereby increasing the number of spikelets and reducing the cusp. The detasseling time is generally between 9 am and 4 pm, pay attention not to damage the blades. Detasseling can only account for 30-40% of the total number of plants.

Third, auxiliary pollination. In the flowering period of maize, it is necessary to seize the favorable opportunity to manually collect pollen and spread it to the head of the corn. It is necessary to adopt border cultivation and increase opportunities for insemination. During pollination, if the filaments are too long to be conducive to fertilization, the filaments should be cut short, and they should be about 1.5 centimeters long. The filaments should be in a puddle and should not be covered in order to facilitate pollination. In this way, the disappointment spikes can be greatly reduced, and the grain can be increased to make it fuller and more productive.

Fourth, drought relief. In the pollination period of corn, long-term drought and long-term rain are unfavorable. In case of drought, we should adhere to early and late watering drought, cultivating loose soil, to ensure that there is sufficient moisture corn grouting; if it is rainy weather, we must clear the drainage ditch, remove waterlogging in time, in order to facilitate grain filling mature.

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