According to the general conditions of selecting the types of thermal resources, the long-growing maize varieties have good yield and potential for increased yield. The local heat and growth period must meet the requirements for complete maturity of the varieties. Therefore, to select corn varieties, it is necessary to ensure normal corn maturation, but can not affect the timely sowing of the crop. The height of the terrain is related to the ground temperature, and the temperature of the ground is high. It is advisable to choose a late-maturing variety or a medium-late-maturing variety with a long growing period; a moderate-late-maturing variety is suitable for the flat growing season; middle-early-maturing varieties should be selected for the alfalfa.
According to production management conditions, the high yield potential of the maize varieties selected is related to the production and management conditions. The varieties with high production potential need good production management conditions. The varieties with lower production potential and the required production and management conditions are also relatively low. Therefore, in regions with high production management, fertile soil, and abundant water sources, corn varieties with high yield potential and large potential for yield increase can be selected. On the contrary, we should choose varieties with lower production potential but better stability.
The increase in yield and income of maize varieties planted according to the previous cultivation has a direct relationship with the cultivation of the former crop. If the former is planted with soybeans, the soil fertility is better, and high-yielding species should be selected; if the former is planted with corn and grows well and yields, the species can be continued to be selected; if the former is infected with certain diseases, When selecting seeds, avoid varieties that are susceptible to the disease. In addition, the same species can not be planted continuously in the same plot for three or four years, otherwise there will be land barrenness and variety degradation.
According to the seed appearance, the purity of the corn varieties selected and the quality of the corn varieties directly affect the level of corn production. When the purity of the first grade seed (98% purity) of corn drops by 1%, the yield will drop by 0.61%. The selection of high quality varieties is a good guarantee for achieving high yields in corn. The high-quality seed bags are sealed at one time, with the name and detailed address of the seed company and telephone; the date of production, purity, clarity, moisture, and bud rate specified on the seed label are clear; the shape, size, and color of the seeds are neat and consistent.
According to the experience of precipitation and accumulated temperature, according to the experience, the amount of snowfall was small in winter last year and not cold in winter. In the second year, summer rainfall will be more, the accumulated temperature will not be high, and the species with too long growth period will not have enough accumulated temperature, which often affects maturity. On the contrary, in the winter of last year, the amount of snowfall was heavy and the winter was very cold. In the following year, the summer rainfall was generally less and the accumulated temperature was higher. Therefore, varieties with strong drought resistance should be selected, and the middle and late-maturing varieties can be properly planted in the depression.
According to production management conditions, the high yield potential of the maize varieties selected is related to the production and management conditions. The varieties with high production potential need good production management conditions. The varieties with lower production potential and the required production and management conditions are also relatively low. Therefore, in regions with high production management, fertile soil, and abundant water sources, corn varieties with high yield potential and large potential for yield increase can be selected. On the contrary, we should choose varieties with lower production potential but better stability.
The increase in yield and income of maize varieties planted according to the previous cultivation has a direct relationship with the cultivation of the former crop. If the former is planted with soybeans, the soil fertility is better, and high-yielding species should be selected; if the former is planted with corn and grows well and yields, the species can be continued to be selected; if the former is infected with certain diseases, When selecting seeds, avoid varieties that are susceptible to the disease. In addition, the same species can not be planted continuously in the same plot for three or four years, otherwise there will be land barrenness and variety degradation.
According to the seed appearance, the purity of the corn varieties selected and the quality of the corn varieties directly affect the level of corn production. When the purity of the first grade seed (98% purity) of corn drops by 1%, the yield will drop by 0.61%. The selection of high quality varieties is a good guarantee for achieving high yields in corn. The high-quality seed bags are sealed at one time, with the name and detailed address of the seed company and telephone; the date of production, purity, clarity, moisture, and bud rate specified on the seed label are clear; the shape, size, and color of the seeds are neat and consistent.
According to the experience of precipitation and accumulated temperature, according to the experience, the amount of snowfall was small in winter last year and not cold in winter. In the second year, summer rainfall will be more, the accumulated temperature will not be high, and the species with too long growth period will not have enough accumulated temperature, which often affects maturity. On the contrary, in the winter of last year, the amount of snowfall was heavy and the winter was very cold. In the following year, the summer rainfall was generally less and the accumulated temperature was higher. Therefore, varieties with strong drought resistance should be selected, and the middle and late-maturing varieties can be properly planted in the depression.
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