First, according to the different uses of corn, choose the appropriate varieties. The selection of maize growth period is suitable for the local frost-free period, and it is approved (or recognized) by the seed management department at or above the provincial level, and it is resistant to head smut (commonly known as "black rice"), head smut, ear rot, grain rot, leaf spot, stem rot, bacterial wilt, rough mosaic, corn borer (commonly known as "stem borer") and other diseases. The specific methods are as follows: the edible corn should be horny corn, which often has good rice quality and high lysine content, and the grain type is hard and semi-hard, horse tooth and semi-horse tooth corn varieties. Such as Dongdan 90, Danxin 2 100, Shenyu 26 and other common corn hybrids as the main planting varieties of green food spring corn; The special corn in edible corn includes waxy corn, sweet corn, sweet waxy corn, popcorn, fruit corn, low-sugar and low-fat corn and white-grain hybrid corn, and corn varieties that are approved (or recognized) by seed management departments at or above the provincial level and suitable for local cultivation should also be selected. For example, Jingbainuo No.2, Dong Tian 1 and Nongda L402 should give priority to edible corn varieties, but also semi-powdery corn varieties with slightly poor rice quality but high yield, so as to improve the planting income. Such as Beiyu 1, Huadan 208, Dan Xin 13 and other semi-powdery high-yield corn varieties; Starch fermented corn is mainly used to produce edible alcohol. We should choose corn varieties with high protein and not too thick grain epidermis, and often choose powdery and semi-powdery corn varieties famous for high yield in order to obtain high yield. Such as semi-farinaceous corn varieties: Beiyu 1 No.,Huadan 208, Dan Xin13; Silty corn such as Cheng Dan 50 and other corn hybrids; Corn varieties with high starch content should be selected to produce starch corn. Such as Sanbei 6, Denghai 3, Kuancheng series and Chengyu series. Second, pay attention to variety isolation in planting. Among special corn and traditional non-hybrid corn, corn varieties that are easy to cross-pollinate, such as full waxy corn, sweet waxy corn and sweet waxy corn, and most traditional non-hybrid corn (such as Baitoushuang and Baimaya). ) and most white hybrid corn (such as Danbai 50 1 and Dongbai 100). ) should be planted separately from other corn varieties, and the isolation distance should be more than 200 meters when planting in a large area. Third, when harvesting ears of corn, harvest them separately according to their uses, and store them separately to dry. (It is strictly forbidden to build square cribs and round cribs with large diameter that are not overhead below, and store the dried corn in airtight big cribs in a certain direction, and cover them with tarpaulins in case of rain and snow to prevent the seeds in the cribs from becoming moldy. Before threshing, pick out the moldy and rotten ears in the stack, then thresh and dry the grains separately, and then transport different kinds of grains, and then sell them when they meet the requirements of grain harvesting, so as to prevent different kinds of corn grains from being mixed together and not selling at a good price.

4. Corn for green organic food, corn for high-end green food and corn for A-level green food planting base products should be recognized by the green food management department at or above the provincial level, with green food signs (trademarks) and labels (indicating planting varieties, quality grades, production date, production base name and contact number, production base website, grower name and contact number, purchasing unit name and contact number, Only when the name and contact number of the quality inspector, the confirmation opinion of the supervision company, the name and contact number of the person in charge of the supervision company and the website of the supervision company are established, the production files can be traced back) and packaging (in line with the requirements of NY/T658 General Packaging Guidelines) can gain the trust of users. At the same time, growers need to integrate traditional sales methods with e-commerce platforms, and promote their products by visiting supermarkets in large and medium-sized cities, shops and kindergartens in high-end communities for users to taste for free, so as to achieve sales growth. Only by doing the above four suggestions at the same time can high-grade corn growers achieve high quality and good price and obtain higher planting benefits.