1, seedling stage. From seed emergence to jointing stage is the vegetative growth stage of maize, which takes root, grows leaves and differentiates stems. The central task of field management in this period is to ensure that all seedlings are sown at one time, the seedlings are neat and uniform, promote the growth of roots and cultivate strong seedlings.

2. Title stage. It refers to the stage of maize from jointing to tassel flowering, also known as vegetative growth and reproductive growth. During this period, the roots, stems and leaves grow vigorously, and the male and female ears differentiate and develop rapidly, which is the most vigorous period of maize growth and development in its life, and also the key period to determine the number of ears, ear size and grain number per ear. The central task of field management in this period is to promote strong and developed roots, stout stems, wide and thick leaves in the middle and fast closure.

3. Flowering period. From tassel flowering to grain maturity, it is also called reproductive growth period. The grain yield of maize is mainly formed by the platform products at this stage. Strengthening field management, ensuring fertilizer and water supply, ensuring normal flowering, pollination and fruiting, keeping green leaf area to the maximum, prolonging filling time, preventing disaster lodging, and striving for multi-grain, large-grain, whole-grain and high-yield are the central tasks at this stage.

Extended data

Efficacy and function of corn

1, invigorating spleen and benefiting stomach: from the medicinal point of view, corn is sweet and belongs to the stomach, which has the effect of invigorating spleen and benefiting stomach.

2, anti-aging: corn contains a variety of trace elements, and some experts can prove that it has anti-aging effect by doing experiments with animals.

3, anti-cancer: it also contains a lot of carotene, the content is about 5 times relative to soybean, which can effectively inhibit cancer and achieve anti-cancer effect.

4, laxative: corn stalk core and corn residue have a good laxative effect. When eating, you can cook porridge with sweet potatoes, which can effectively relieve constipation of middle-aged and elderly people.

Corn husk weaving:

Corn bract leaves have the characteristics of long fiber, strong tension and good flexibility, and are widely used in textile industry. When harvesting the ears of corn, peel off a few pieces of white, thin and soft corn husks and dry them in the shade to avoid yellowing and brittleness due to the sun. After processing, it is whiter and softer, and it can prevent insects from eating.

The main varieties are door curtains, cushions, carpets, baskets, sundries, etc., with more than 7000 colors. Corn skin curtain has its own characteristics. It adopts the method of vertical linear knitting and is tied with a chain. The knot is easy to move, and it can be released freely. People come in and out or the breeze blows gently, naturally swaying and dancing. There are three kinds: plain color, color and pattern. Cushion has the characteristics of ventilation, heat dissipation and moisture absorption.

Baidu encyclopedia-corn