First, choose according to the purpose of planting
Maize can be broadly divided into three types: grain type mainly based on grain yield, ear type mainly based on fresh ear production, and plant type (silage maize) mainly based on overall biomass production.
1. Grain type. Including ordinary corn, high-quality protein corn, high-starch corn, high-oil corn, popcorn and so on. (1) Ordinary corn. High yield, adaptability, planting area and wide application range. Deep processing, edible, feed, medicinal and industrial use. (2) High-quality protein corn. It can raise livestock and process high-quality foods. (3) High-starch corn. Starch includes amylose and amylopectin, and is mainly used for pharmaceutical and industrial raw materials. (4) High-oil corn. Used to squeeze corn oil. (5) burst corn. Mainly used to make popcorn.
2. Ear type. Mainly glutinous corn, sweet corn and bamboo shoots and corn. These corn mainly harvest ear, and the harvest season is very time-consuming. Once the harvest period is missed, it will seriously affect the quality and economic benefits. (1) Waxy corn. Taste is sticky and palatability is good. (2) Sweet corn. Divided into Putian, enhanced sweet and super-sweet, they all win the market with high sugar content, sweet crispness and deliciousness. (3) shoot corn. Harvesting period before silking, splitting the loquat leaves, removing filaments, to have no refined corn shoots. The ear-type corn needs processing workshops in the vicinity and it is processed with harvesting. Otherwise, after long-distance transportation, it will affect quality and even scrap, causing serious economic losses.
3. Plant type. Mainly refers to silage corn. Silage corn wax harvesting, whole plant processing, crushing silage, for cattle, sheep and other feed.
Second, according to the area of ​​choice
The area where corn is grown in China can be divided into four types: spring, summer, autumn and winter. Our province is a spring broadcast area and a summer broadcast area. The spring sowing area is mostly a dry rain-fed area. Once a year, it should be selected for spring drought-tolerant varieties, such as a well-developed root system, robust plants, and mature stalks. In the summer sowing area, wheat is the main crop of multiple cropping corn, with abundant rainfall and less sunshine hours. It is necessary to select the varieties that are resistant to rain and sunshine, strong grasshopper resistance, short plants, and lodging resistance.
Third, according to the choice of soil and environment
Maize does not have strict requirements for soil quality, but specific to a certain species has a choice of environment. For example, some varieties like fertilizer and water, some varieties are resistant to drought, thin, some saline-alkali resistance, some high temperature resistance, and some edge strong advantage, need to be sparse planting, and some weak side edge, rely on the group to increase production. The environment is suitable for the variety to play its advantages and obtain a higher level of production.
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