From the sowing of corn to new kernels matured into corn. The number of days from sowing to maturity is generally referred to as the whole growth period. The number of days from emergence to maturity is referred to as the growth period, and the growth period is related to the variety characteristics and environmental conditions.
The accumulated temperature of a certain species during the whole growing period (sum of the average temperature of ≥10°C per day during the growth period) is basically stable, and the growth period will be appropriately shortened when the temperature is higher, and the growth period will be lower at a lower temperature. Properly extended.
The northern spring sowing maize area starts from Bohai Bay at latitude 40, passes Shanhaiguan, passes along the Taihang Mountain of the Great Wall, passes through Taiyue Mountain and Luliang Mountain, and reaches the northern area of ​​the north of the Qinling Mountains. Including Heilongjiang, Jilin, Liaoning and Inner Mongolia, as well as parts of Shanxi, Ningxia, Hebei, northern Shaanxi, and Gansu, it is one of China's major corn producing areas.
Variety selection.
1. Choose the approved variety. Select the countries or provinces that have covered the region and validate the varieties, and pay attention to the selection of comprehensive traits such as adaptability, yield, quality, and resistance (resistance to disease, resistance to insects, resistance to stress).
2. Choose a suitable variety for the growth period. According to the actual planting conditions, select the appropriate variety of the growth period (the disappearance of the milk at the time of corn harvest, the emergence of the black layer), try to avoid the occurrence of waste of light and heat resources and lack of maturity. Covering the film to increase the accumulated temperature of the activities of 200 °C -300 °C, you can choose to live longer than the local open field 7-15 days of the fertility of the variety. Direct harvesting plots should be selected for early ripening varieties.
3. Select quality seeds. Note that the four indicators of seed (purity, bud rate, clarity, moisture) meet the national standards. The national seed standards for field crops are: purity ≥96%, bud rate ≥85%, netity ≥99%, moisture ≤13% (the moisture content of corn seeds in the north of the Great Wall and alpine regions is not higher than 16%) . Note that the seeds with high germination potential are preferred, and the germination rate is higher when the seeds are sown.
4. Pay attention to the collocations. In general, a combination of 3-4 cultivars in an optimized production area, including main cultivars, collocation cultivars, and seedling cultivars or varieties with different ripening dates, can complement each other, increase the ability to withstand natural disasters, pests and diseases, and achieve high and stable yields. Silage corn, waxy corn and sweet corn can be used for the extension of the harvesting period, and they can be planted with different maturities (for example, the mid-late and late-maturing crops are mainly mixed with late-maturing and medium-maturing).
5. Choose from species. For regions or lands with good conditions for water and fertilizer, dense and high-yielding species may be selected; species that may have defects may be avoided as far as possible according to local climate characteristics and epidemics of diseases and insect pests; early maturing species should be selected appropriately in the dry regions; The variety.
Seed treatment. Purchase seeds that have been selected, graded, and coated, such as seeds that have not been treated, seed treatment, seed drying, and coating.
1. Select species. The seeds were carefully selected to remove diseased grains, insect grains, broken grains, impurities, and excessively large and small grains.
2. Sowing seeds. One week before sowing, select the sunny days and spread the seeds on the sunny or sunny ground or on the mat for 2-3 days to increase the seed germination rate, kill some pathogens, and reduce the incidence of head smut.
3. Seed coating. According to the occurrence of diseases and pests in the field throughout the year, clear targets for prevention and control, targeted selection of coated seeds. If you purchase uncoated seeds, you can use seed coating agents and micro-fertilizers for seed dressing. However, you should choose the seed coating agents produced by regular manufacturers, and determine the dosage according to the content. Do not promote the direct purchase of pesticides and fungicides as simple coating to avoid injury. , to reduce the activity and adaptability of seeds.
Color waxy corn is generally white, yellow, red, purple and black, white, yellow and purple corn is the basic color. The purple gene in a purple/white hybrid will naturally become purple if it "beats" the white gene, and vice versa, if it's a tie, what we see is a white/purple corn. Purple can turn into red corn and black corn, which is often called "red is purple, black is purple."
Mottled Corn Cut,Non Gmo Corn Cob,Mottled Waxy Corn Cut,Non Gmo Corn Cob Cut
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