High-yield Cultivation Techniques of Super-Sweet Maize
There are three types of sweet corn: sweet corn, super-sweet corn and sweetened corn. In recent years, the development of super-sweet corn has been the main focus. Sweet corn can be used as both fruit and vegetable, and can also be made into canned foods. It has rich nutrients and dietary fiber, and has an adjuvant effect on diseases such as cardiovascular disease and gastric cancer, and has become a new type of natural nutritional food popular in the world. Sweet corn is planted in the middle and upper fertility fields, and the yield per hectare of 667 m2 is over 800-1000 kg. After harvesting, the stems and leaves of the barley are still green and green, and can be used as a green feed for raising dairy cows. The whole growth period of super-sweet corn is usually 75-85 days. It can be planted for two years in one year, and it can even be planted in three places in some places. It is easy to form large-scale planting. Besides local sales, it can also be exported to Hong Kong and Macao. Higher. The highlights of the high-yield corn cultivation techniques are described below. 1. The excellent hybrid generation of superior hybrid super-sweet corn seeds has great potential for yield increase, strong resistance and wide adaptability, and the yield increases by 30% to 50% compared to common varieties, laying the foundation for increasing yield and increasing income. For example, the newly developed super sweet hybrids such as Spike Sweet No. 2, Super Sweet 711, Yuetian No. 3, Super Sweet 28, and Jinyin Su No. 1 have high yield, high quality, multi-resistance, and wide adaptability. Sweet corn hybrids can obtain better economic benefits. 2, timely sowing, nurturing strong seedlings. Early planting period in mid-February, 75-80 days of the whole growth period, early breeding seedlings should pay special attention to the prevention of cold springs, the use of indoor, greenhouse or nylon film insulation nursery; Chinese planting period in early May, the whole growth period 60- About 65 days, seedlings need to be shady with shading nets to prevent direct sunlight and heavy rain; late planting period is from late August to early September, the whole growth period is about 80-85 days, and the method of raising seedlings is the same as that of Zhongsheng. Nursery land should be selected for high land, not waterlogging, sunny fields. The tube nursery should use nutrient-rich pond mud, vegetable garden soil, etc. The nursery soil is pressed into crumbs and evenly put into a paper tube. Each paper tube puts a seed, and the seeds are pressed into the soil gently with the fingers. water. It is advisable to keep the seedlings moist in the nursery. 3, fine soil preparation, deep trenches. Choose fertile soil for planting. The clods were crushed in a granular shape with a width of 1.26m, a ditch depth of 23-26cm and a width of 33cm to prevent waterlogging and facilitate drainage and deep rooting. The second construction can be done without plowing over the ground, removing the stalks and spraying the weeds with herbicides. 4, timely transplantation, rational close planting. Maize seedlings were transplanted with 3.5-4 leaves and their spacing was 33-40 cm. Due to wind, rain, low temperatures and other bad weather, it is not suitable for close planting, with 3000-3200 acres planted. In China, the weather is very hot, there are many pests and diseases, and it is not suitable for close planting. The number of acres is 2700-3000. The most suitable climate for late-season corn growth is to plant 3200-3400 acres. 5. Strengthen fertilizer and water management. Maize is a crop that needs a large amount of fertilizer, in addition to the base fertilizer, but also a lot of fertilizer, in order to obtain high yield. Basal fertilizer: 100kg of superphosphate or 375kg of chicken, duck and manure per acre was used in combination with site preparation before transplantation. Top dressing: 80 kg of compound fertilizer, 50 kg of urea and 25 kg of potassium chloride per acre. Among them, 3 to 5 days after transplantation, 1 kg of compound fertilizer and 1 kg of urea per gram of manure were applied once every 3 days; 7 to 10 days after transplantation, 10 kg of compound fertilizer and 7.5 kg of urea were applied uniformly to the sorghum surface; Days later, to re-fertilize, about 7-10 days Shi 1 times, Mushi compound fertilizer 12.5kg, urea 7.5kg, potassium chloride 5kg. Apply water after each fertilization, or combine irrigation with fertilization, or apply it before and after rain. After plant female and male flowers are all pollinated, 10kg of compound fertilizer, 7.5kg of urea, and 7.5kg of potassium chloride are applied per mu, and 10kg of urea is applied again 7-8 days before harvest to enrich corn. The sweet corn avoids waterlogging and is afraid of drought. Therefore, we must keep the soil moist throughout the growing season. The water should be drained in time and the drought should be promptly irrigated. 6, timely war, weeding soil. About 30 days after transplantation, the leaves of the plant on the ground above the section of the leafhopper produce large and small pods. Although the small pods can also form spikes, they are not stunted. Moreover, one pod and two pods are not big enough to affect the value of the commodity. Therefore, the time should be small. Pick it off to focus on nutrition and promote greatness. The harvested oysters can be sold as vegetables and can generate income of 150-200 yuan per mu. Before the differentiation of plantlets, 15–20 days after transplanting, weeding, combined with loose soil, the soil on the bottom of the ditch was planted on both sides of the plant to improve the lodging resistance of the plant and deepen the irrigation and drainage channels to facilitate drainage and irrigation. After spike differentiation, no soil can be loosened to avoid damaging the roots. Generally, every time we make weeds and soils twice. 7, to strengthen the prevention and control of pests and diseases. The main pests of sweet corn are ground tigers, corn borers and aphids. Attention should be paid to the prevention and control. In particular, the earliest larvae of corn larvae must be prevented from entering the pods during heading and affecting the quality of the products. Dichlorvos and insecticides can be sprayed 2-3 times, but care should be taken before harvesting. The main diseases of sweet corn are large leaf spots, small leaf spots, etc., and can be sprayed 2-3 times with sulfuric acid suspension, thiophanate and other fungicides. The corn sheath blight was particularly severe in maize, and was sprayed and treated with Jinggangmycin 300-350g and 50-60kg every 7 days.