"The multiple ears of corn are mainly due to the uncoordinated flowering of the male and female spikes. The male flower is often opened, but the first female ear has not bloomed. The advantage of the main spike position is lost, and other axillary buds cannot be inhibited from developing into spikes. Spike phenomenon, and these extra corn ears are mostly empty ear, basically not strong or very low rate of seed setting, have a great impact on the yield.†Recently, when reporters interviewed in Dafeng City, they discovered some spring corn with multiple panicle strains. Specially invited corn cultivation experts and Professor Lu Weiping of Yangzhou University to analyze the causes of the occurrence of multiple earings in corn.
Lu Weiping introduced that in the normal condition of maize, only one ear is planted in the next plant, which is mainly because the first developing young panicle has the advantage of ear position and can inhibit the spike differentiation and development of other axillary buds. In case of abnormally high temperature, drought, rain or other bad weather, the first developing young ears of corn are hindered from developing under adverse conditions, unable to form enough hormones to inhibit the differentiation and development of other axillary buds, and their ear position advantage will be lost. It is possible to grow multiple young ears. When a single plant has multiple panicles and nutrients are distributed and supplied, the number of panicles will be smaller and the seed setting rate will also decrease, which will have a large impact on the yield. In addition, corn is harmed by diseases such as dwarfism, and multiple ears also appear. Some corn earings are also determined by genetic characteristics. For example, the phenomenon of multiple spikes in a sweet waxy corn variety is very common.
There are many factors that may lead to loss of corn ear strength. In the flowering period, it encounters continuous rain, poor silking of the female ear, or the tassels do not bloom normally, affecting pollination and fertilization; in the crucial period of water demand before and after the heading of corn, inadequate supply of soil moisture will lead to the emergence of males and females. The interval between ear-pumping is prolonged, resulting in a rare flowering period, which affects the fertilization and fertilization of the first female ear; damage to pests and diseases can also cause the first female ear to develop poorly or even stop. In the ear development stage after corn jointing, if the fertilizer and water are sufficient, excessive nutrients in the plant body cannot be consumed, and there is also the possibility of forming multiple spikes. At this time, the redundant ear is cut off and only 1 or 2 ear can be reserved. The ear shape and seed setting rate of maize ears were normal.
Lu Weiping said that due to the need for intercropping, the planting density of spring maize in our province is low, and light and fertilizer and water conditions are good. In the field, some plants will have 2 or more female ears. In this case, the growth and development of fruit and cultivars of the varieties cultivated in general provinces are relatively good and have little effect on the yield; while some spring maize varieties coming from the north, because they are not adapted to the climate of this province, often The seed setting rate is lower and the yield is heavier.
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