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1. Congenital sterile culms. Also known as "public corn." It is mainly due to the decline of physiological function in the seed, the disorder of metabolism, and the disturbance of tissue transport in the body, resulting in less nutrient transport through the stalk and stagnation due to lack of nutrition. This phenomenon cannot be prevented after sowing.
2. Unstable empty stalks. Although young plants have a young ear type, they do not have filaments or seeds. There are many reasons for this phenomenon: 1 Cultivation is too dense, with poor ventilation and light transmission; 2 Inadequate supply of nutrients; 3 Drought or excessive rain during the jointing and ear differentiation; 4 Poor quality; 5 Pest and pest damage.
To prevent instability of corn stalks, the following measures must be taken.
(1) Proper close planting to ensure ventilation and light transmission to meet the requirements of light during the three-leaf period of corn. Wide and narrow rows can be planted to create good conditions for growth and development.
(2) Selecting excellent hybrid varieties, sowing the seeds before sowing to make the seedlings tidy and robust.
(3) Within the corn growth period, and time seedlings, Dingmiao, retain strong seedlings. Timely cultivating and weeding, prevention of disease, insects, and weeds, artificially assisted pollination. Interplanting at the flowering stage, the long leaves can be cut to the top 3-7 cm to make the filaments spit early and increase the chance of pollination.
(4) Fertilization should be combined with nitrogen, phosphorus and potassium, and micro-fertilizer should be used appropriately. For every 667 square meters, 0.5 kg to 1 kg of zinc sulfate can be applied. In the soil where the soil is low in fertility, topdressing should be repeated, but care should be taken to prevent light green and late ripening. Watering should be controlled during the seedling stage, and proper irrigation should be conducted after jointing in a timely manner to ensure nutrient supply and water supply during the panicle differentiation period, to promote the differentiation of young panicles and to shorten the time between male and female silking, and to increase pollination opportunities.
(5) plant growth and development into the human ear seat and tasselling 5 to 7 days before, respectively, chase and apply spikelet differentiation fertilizer and tapping fertilizer, respectively, in order to maintain a good ear, ear spike elongation drum grain.
Corn often produces inedible spikes or spikes, but little or no granules. It is called "gun ring" and called empty stalk. The causes of corn empty stalks are as follows: