There are three types of corn lodging: stem fall, root fall and stem break. The stem is tilted or bent because the tissue strength at the base of the stem does not take up the weight of the aerial part. This lodging has less damage to the tissues of the roots and stems, and has less effect on the yield. Roots are due to poor root development. After rain or irrigation, lodging occurs in the event of strong winds. This lodging plant has a large inclination and the plants even lie flat on the ground. After lodging, the ventilation and light transmission conditions deteriorated, which has a great influence on the output. Stem breaks generally occur before and after tasselling. The reason is that the mechanical organization of the stalk is tender, or the worms are eroded and the wind resistance is reduced. The size of the impact on the yield depends on the site and time of the break and the number of broken plants in the field.
From the perspective of production in recent years, unsuitable weather is the main cause of corn lodging. From the jointing stage to the tasseling stage, the corn grows quickly and the stems are fragile. In case of heavy winds and heavy rains, large areas will be laid down, and the serious ones will collapse and reduce production. Inadequate cultivation and management, such as late sowing date, poor sowing quality, unreasonable fertilization, lack of timely control, blind watering, improper use of herbicides, inadequacy of pest control, and plowing of the bottom layer so that the roots cannot be pulled down, etc., will reduce corn Resistance to lodging.
Judging whether the seed quality is qualified depends on whether the four indicators of purity, cleanliness, moisture, and germination rate are up to the standard. The breakage of corn stems has nothing to do with the seed quality, and it has a certain relationship with the resistance of the varieties. The lodging resistance of maize varieties is relative and there are also stages. Some varieties are more resistant to the early stage, while some varieties are more resistant to the fall. Each species has a relative resistance to lodging, but also has a relative resistance. The down phase, also known as the lodging sensitive period. When the stormy weather occurs at a time when it is in the lodging sensitive period of a certain species, the degree of lodging of this species is heavier.
Zhongdan 909 is a corn variety developed by the Crop Science Research Institute of the Chinese Academy of Agricultural Sciences. It passed the national examination and approval in 2011 and its validation number is Guoshenyu 2011011. It is suitable for use in Henan, Baoding, Hebei and its south, and Shandong (except Binzhou). Shaanxi Guanzhong Irrigation District, Shanxi Yuncheng, northern Jiangsu, northern Anhui (except Huaibei City) summer sowing. It is understood that this species has good resistance to lodging at the late growth stage, but encounters strong winds before and after the big bell stage and is easily broken from the third and fourth positions of the stem. In order to prevent the corn from appearing broken stems, corn varieties should be selected for large-scale production. Plant varieties with good toughness and low ear positions should be selected as far as possible.
From the perspective of production in recent years, unsuitable weather is the main cause of corn lodging. From the jointing stage to the tasseling stage, the corn grows quickly and the stems are fragile. In case of heavy winds and heavy rains, large areas will be laid down, and the serious ones will collapse and reduce production. Inadequate cultivation and management, such as late sowing date, poor sowing quality, unreasonable fertilization, lack of timely control, blind watering, improper use of herbicides, inadequacy of pest control, and plowing of the bottom layer so that the roots cannot be pulled down, etc., will reduce corn Resistance to lodging.
Judging whether the seed quality is qualified depends on whether the four indicators of purity, cleanliness, moisture, and germination rate are up to the standard. The breakage of corn stems has nothing to do with the seed quality, and it has a certain relationship with the resistance of the varieties. The lodging resistance of maize varieties is relative and there are also stages. Some varieties are more resistant to the early stage, while some varieties are more resistant to the fall. Each species has a relative resistance to lodging, but also has a relative resistance. The down phase, also known as the lodging sensitive period. When the stormy weather occurs at a time when it is in the lodging sensitive period of a certain species, the degree of lodging of this species is heavier.
Zhongdan 909 is a corn variety developed by the Crop Science Research Institute of the Chinese Academy of Agricultural Sciences. It passed the national examination and approval in 2011 and its validation number is Guoshenyu 2011011. It is suitable for use in Henan, Baoding, Hebei and its south, and Shandong (except Binzhou). Shaanxi Guanzhong Irrigation District, Shanxi Yuncheng, northern Jiangsu, northern Anhui (except Huaibei City) summer sowing. It is understood that this species has good resistance to lodging at the late growth stage, but encounters strong winds before and after the big bell stage and is easily broken from the third and fourth positions of the stem. In order to prevent the corn from appearing broken stems, corn varieties should be selected for large-scale production. Plant varieties with good toughness and low ear positions should be selected as far as possible.
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