The causes of corn empty stalk, lack of grain and baldness and the prevention and control measures
Corn empty stalks, lack of grain and baldness are common phenomena in corn production, and directly affect the level of corn yield. The main reasons for corn empty stalk, lack of grain and baldness are as follows:
1. Variety factors
Different breeds have different adaptability to the external environment and resistance to bad environment. When the external environmental conditions in individual years are more than the adaptation range of varieties, corn stalks, lack of grain and baldness are prone to occur.
2. Over-close planting: corn plants in the middle of density ambassadors could not fully receive sunlight, resulting in the formation of empty stalks, baldness, and lack of maturity in the ear.
3, jointing period, low temperature and lukewarm illumination: the 25-30 days of maize emergence in the beginning of the jointing stage of maize, at a time when the female ear differentiation period, in case of rain and sunshine, corn photosynthesis is affected, resulting in insufficient nutrients, can not meet The need for female ear differentiation results in the inability of the ear to differentiate or poorly differentiate, resulting in empty stalks and baldness.
4, tasseling before high temperature and drought, resulting in tassel, ear flowering inconsistent, tassel flowering loose powder in advance, excessive hair stranding lagging, resulting in the formation of empty stalk and bald tip.
5, pollination period of continuous rain, resulting in male flowers can not be a good loose powder, even if the pollen falls on the female flower filament is also due to excessive water swelling and rupture or washed out by the rain can not be normal pollination caused empty stalks and bald tip.
Precaution
1. Select corn varieties with good adaptability and good robustness.
2, according to the characteristics of different varieties to determine the appropriate density.
3, timely early sowing can meet the demand of corn for light, but also can effectively use natural precipitation to coordinate the growth of corn, but also to avoid the disease caused by late cool weather.
4. Strengthen fertilizer and water management before tasseling to avoid “card neck drynessâ€.
5. Artificially assisted pollination can compensate for poor pollination caused by weather and other reasons, and effectively prevent the occurrence of baldness and empty stalks.
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