Four main points of corn field maintenance management

Corn field maintenance management is very important, because it is directly related to the yield of corn. Now the four main points of corn field maintenance management are introduced below for reference.

1. Seedling management

(Before emergence-before jointing) 4-5 fully expanded leaves or 7-8 visible leaves. The leaves are dark green and the leaves are thick and thick, showing strong seedlings. For this purpose:

(1) Squatting seedlings: keep the soil dry and wet, and the soil moisture accounts for 60% of the field's water holding capacity. It promotes the development of root systems to form swollen roots and deep rooting, so as to achieve the purpose of squatting seedlings and promote strong growth. Baofeng harvest.

(2) Drought-proof and stain-proof: In case of drought caused by weather, soil drought should resist drought and protect seedlings. Waterlogging at the seedling stage of maize, budding and waterlogged plots in low-lying areas should be drained to prevent waterlogging and protect seedlings.

2. Jointing and long-earning management

It takes 30 days before jointing and tasseling. During this period, the vegetative growth and reproductive growth go hand in hand, mainly based on the differentiation of male and male ears.

(1) Spring corn emerges-after jointing, it often encounters spring drought. Whether watering is used for watering depends on the amount of precipitation. In the critical period of corn water demand, precipitation cannot meet the needs, and is often threatened by drought. Therefore, spring moisture retention, big trumpet period and irrigation before and after heading are important measures to ensure high yield of spring corn. Intercropping corn requires a large amount of water for the differentiation of the male and female ears at the end of June and the beginning of July. It may not always be in the rainy season. Even if the spring water is poured, the evaporation will be greatly lost due to the high temperature. The possibility of encountering drought is also great, and irrigation is a necessary measure to obtain high yield.

(2) Irrigate the water: the corn needs water in the interim period from 10 days before the tassel to 20 days after the tassel is sensitive to water. In case of drought, it is necessary to water the drought to prevent drought, and to ensure the development of the male and male ears and the water demand during the subsequent growth period, in order to obtain high yields for the big ears. In case of heavy rain during the above period, the field water should be removed in time after the rain, and the soil should be raised to prevent lodging in case of strong wind.

3. Management of flowering and fruiting period: (corn from flowering to maturity-maturity) lasts 45-55 days. During this period, the reproductive growth period when the flowering and pollination grain filling was full, determined the components of yield: number of ears, number of ears and grain weight.

(1) Pour enough water for earing and flowering to promote flowering and pollination, increase seed setting rate, prevent premature senescence of stems and leaves, and strive for multiple grain weight of ears.

(2) Pouring the seeding water with good grouting: the leaves of the plant will wither from the bottom to the top during the filling stage. If the plant is premature, it should be fertilized and watered to increase the grain weight.

(3) Drainage: due to heavy rain, the field water should be eliminated in time.

(4) Reasonable dense planting can make full use of light energy, ground force and space, so that the plants are well ventilated and transparent, thereby reducing empty rods.

(5) Scientific management of fertilizer and water, according to the characteristics of each growth period, pay special attention to the management of water and fertilizer for tapping, so that sufficient water and nutrients can be obtained during corn growth and development. Plants grow well and reduce empty stems.

(6) Do artificial auxiliary pollination to ensure that female ear pollination completely reduces baldness and lack of grain.

4. Prevent empty bar baldness and lack of grain

There are many reasons for empty-bar baldness. For example, the planting density is too large, the light is insufficient, the supply of nutrients is in short supply, and the water is insufficient.

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Black tea (dark tea) is named after the black appearance of the finished tea. It is one of the six major tea groups and is a post-fermented tea. The main production areas are Guangxi, Sichuan, Yunnan, Hubei, Hunan, Shaanxi and Anhui. The traditional black tea is made from high maturity black wool tea, which is the main raw material for pressing tightly pressed tea.
The process of making black tea generally includes four steps: killing, kneading, stacking and drying. Black tea is mainly classified as Hunan black tea (Fu tea, Qianliang tea, black brick tea, Tri-tip, etc.), Hubei green brick tea, Sichuan Tibetan tea (border tea), Anhui Gu Yi black tea (An tea), Yunnan black tea (Pu'er tea), Guangxi Liubao tea and Shaanxi black tea (Fu tea) according to geographical distribution.

The yellow powder in black tea is commonly known as golden flower, a beneficial microorganism, the so-called golden flower, is in the processing of raw materials through the flowering of this special procedure, specifically in the black tea bricks to cultivate a kind of coronary aspergillus substance called coronary scattered cystic bacteria, commonly known as the golden flower, observed under the microscope, each individual golden flower is umbrella-shaped clusters, the whole body is golden and eye-catching, ringed into a group, evenly distributed.

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