Things to note when choosing seeds for spring-planted corn, these aspects cannot be ignored
How to choose good corn seed is a key issue that affects whether yields can be increased in autumn. When choosing good corn seed, farmer friends should follow these principles: 1. Choose seed according to heat resource conditions. The local heat resources are related to the growth period of the corn variety. Corn varieties with a long growth period have good yield performance and...
How to choose good corn seed is a key issue that affects whether yields can be increased in autumn. When choosing good corn seed, farmer friends should follow these principles:
1. Choose seed according to heat resource conditions. The local heat resources are related to the growth period of the corn variety. Corn varieties with a long growth period have good yield performance and relatively high yield-increasing potential. The local heat and growth period must meet the needs of the variety to fully mature.
If heat is sufficient, try to choose corn varieties with a relatively long growth period, so that the production potential of excellent varieties can be effectively brought into play. However, excessively pursuing high yield and using corn varieties with an excessively long growth period will cause the corn to fail to fully mature, with kernels not plump enough, affecting the nutrition and quality of the corn. Therefore, when choosing a corn variety, it is necessary both to ensure that the corn matures normally and not to affect the timely sowing of the next crop. Terrain height is related to ground temperature: on highland, where the temperature is high, it is suitable to choose late-maturing varieties with a long growth period or mid-late-maturing varieties; on flat land, mid-late-maturing varieties are suitable; in low-lying land, mid-early-maturing varieties are suitable.
2. Choose seed according to local production and management conditions. The yield potential of a corn variety is related to production and management conditions. Varieties with high yield potential require good production and management conditions, while varieties with lower production potential require relatively lower production and management conditions. Therefore, in areas with a relatively high level of production management, fertile soil and sufficient water sources, corn varieties with high yield potential and large yield-increasing potential can be chosen. Otherwise, varieties with slightly lower production potential but better stability should be chosen.
3. Choose seed according to the previous crop. The increase in corn yield and income is directly related to the previous crop. If the previous crop was soybean, the soil fertility is relatively good, and high-yield varieties are suitable; if the previous crop was corn and it grew well and yielded well, this variety can continue to be chosen; if the previous corn crop was infected with a certain disease, varieties susceptible to this disease should be avoided when choosing seed. In addition, the same variety cannot be planted continuously in the same plot for three or four years, otherwise the soil will become impoverished and the variety will degenerate.
4. Choose seed according to disease. Disease is the nemesis of high corn yields and is mainly related to the soil. If soil nutrients are unbalanced and ground temperature is abnormal, varieties not suitable for growing under such conditions should be avoided when choosing seed. For example, "Denghai 9" is only suitable for growing in plots with balanced soil nutrients and a high degree of maturity.
5. Choose seed according to seed appearance. The level of purity and the quality of a corn variety directly affect the level of corn yield. For first-grade corn seed (purity 98%), for every 1% decrease in purity, its yield will decrease by 0.61%. Choosing high-quality varieties is a favorable guarantee for achieving high corn yields. High-quality seed packaging bags are sealed in one step, with the seed company's name and detailed address and telephone number; the seed label clearly states the production date, purity, cleanliness, moisture and germination rate; the shape, size and color of the seeds are neat and uniform.
6. Choose seed according to local precipitation and accumulated temperature. According to experience, if the previous winter had little snowfall and the winter was not cold, the following summer will have relatively more rainfall and the accumulated temperature will not be high; varieties with an excessively long growth period will not have enough accumulated temperature, affecting maturity. Conversely, if the previous winter had heavy snowfall and the winter was very cold, the following summer will generally have relatively less rainfall and the accumulated temperature will be relatively high, so varieties with strong drought resistance are suitable.