Planting time of corn in Henan Province

Corn is a widely loved crop, which has high nutritional value and beauty value, as well as rich protein and vitamins. Some farmers in Henan want to grow corn, so when will Henan corn be planted?

Planting time of Maize in Henan Province

The planting of corn in Henan is generally divided into two seasons, the planting time of spring corn is from April to May, and the planting time of summer corn is in mid-June. The planting time of different varieties is slightly different, and everything depends on the actual situation.

Second, the growth cycle of maize

The growth period of corn refers to the number of days from sowing to new seed maturity. The length of growth period varies with variety, sowing date, light, temperature and other environmental conditions. in general early-maturing varieties, late sowing and high temperature, the growth period is short, and vice versa. The whole growth period of maize is divided into sowing, emergence, three leaves, seven leaves, jointing, heading, flowering, filling, milk ripening, maturity and other main development stages. The sowing time is the date of the sowing day, and more than 60% of the seedlings with a height of about 2-3 cm in the seedling stage have been unearthed. The basal stem nodes of more than 60% of the plants in the whole field began to elongate at the jointing stage. In the big trumpet mouth stage, the upper leaves of more than 60% of the plants in the whole field showed trumpet mouth shape. During the heading stage, the male ear tip of more than 60% of the plants in the whole field exposed 3-5 cm of the apical leaf. During the silking period, more than 60% of the plants in the field showed bracts. In the mature stage, more than 90% of the plants in the field hardened, and showed the inherent color and luster of the variety, and the grain milk line disappeared. The process of growth and development of maize can be divided into seedling stage, ear stage and flowering stage.

Seedling stage: refers to the period from emergence to jointing, which is dominated by vegetative growth and centered on root formation. Seedling emergence is from sowing to seed germination, 50% of seedlings emerge in the field, and the seedlings are 2 cm high.

Heading stage: refers to the period from jointing to heading. This period is the period of vegetative growth and reproductive growth, which is the most exuberant period. This stage can be divided into jointing stage, big trumpet stage and small trumpet stage. The jointing stage is the period when the young spike differentiates and the stem nodes of 2 cm to 3 cm can be felt by hand near the ground. The big trumpet mouth stage is when the stick leaves begin to pull out, but have not yet unfolded, forming a cluster of new leaves, flattened and hollow, shaped like a trumpet, and the female spikelet enters the floret differentiation stage. elastic spikelets can be felt between the upper unfolded leaves and the unfolded leaves.

Flowering stage: refers to the period from heading to fruiting, is the stage of grain formation with reproductive growth as the center. It includes heading stage, powder stage and fruiting stage.

The adaptability of corn is very strong, it is planted in most parts of our country, and it is very simple to grow.