As one of the important traditional food crops in Qingjiang Crane Habitat, the yield and quality of corn are directly related to people's food security and the economic income of growers.
However, in the process of planting and transplanting maize seedlings in the field, the problem of low regreening rate of maize seedlings transplanted to the field often occurs, which seriously restricts the production efficiency of maize growers.
Picture 01~02): Corn seedlings are planted and transplanted
In this issue, Qingjiang Crane will continue to pay attention to and chat with all the teachers about the topic of the low rate of transplanted corn seedlings, aiming to analyze the reasons for the low rate of transplanted corn seedlings from multiple perspectives, and put forward corresponding countermeasures, in order to provide a useful reference for improving the survival rate of corn transplanting. I hope you like and actively participate in the interactive comments, forward and share the pictures and texts of this issue.
The low rate of regreening and viability of maize transplanted in the field was related to the effect of soil moisture:
01) Influencing causes: Soil moisture is one of the key factors affecting the survival rate of maize transplanting. Soil that is too dry or too wet is not conducive to the growth and development of corn roots.
Excessively dry (arid) soil will lead to difficulty in water absorption of corn roots (because the ability of the newly transplanted corn plant itself to absorb nutrients and water is relatively poor, and the root growth and development is not good), which affects the normal growth of corn seedlings.
Picture 03~04): Corn seedlings were unearthed and transplanted
Excessively wet soil will cause hypoxia to the root system, causing root disease problems such as root rot.
02) The corrective measures are: ensure that the soil moisture is suitable before transplanting, and keep the soil moist but not too wet through reasonable irrigation and drainage measures.
Effect of the quality of transplanting technology of maize growers on the survival rate of maize transplanting:
01) Influencing reasons: The mastery of corn transplanting technology is directly related to the survival rate of corn transplanting, to put it bluntly, the proficiency of corn transplanting "operating procedures" has a direct impact on the rate of corn regreening.
For example, transplanting corn seedlings too deep or too shallow will adversely affect the growth and development of corn.
Picture 05~06): Corn seedlings are back to green and live
Transplanting too deep will make it difficult for the root system to breathe and absorb nutrients, affecting the normal growth of plants, and is called "low tide seedlings" in rural areas, which are easy to be damaged by waterlogging. If transplanting is too shallow, the root system will be exposed to the air, causing the root system to lose water and dry up. In rural areas, this kind of seedling is called "rest and cool seedling", and it is easy to form "running moisture". Whether it is "low tide seedlings" or "cool seedlings", it is against the "operating procedures" and is an incorrect transplanting method for corn seedlings.
02) Corrective measures: During the transplanting process, the transplanting depth should be mastered to ensure that the root system can fully absorb water and nutrients.
The problem of low regreening rate of corn seedlings caused by underground pests caused by transplanted corn seedlings encountering underground pests:
01) The reason for the impact: The regreening and live tree stage is the high incidence period of underground pest damage.
Picture 07~08): Corn seedlings are planted and transplanted
Underground pests such as grubs, needleworms, black bugs, mole crickets, etc., will eat the corn roots, resulting in root damage and affecting the growth and development of plants. When the harm is serious, it will directly cause the corn plant to "lack monopoly seedlings", reduce the number of basic seedlings per mu, and cause harm to the yield and quality of corn.
02) Corrective measures: In order to prevent and control the harm of underground pests, a combination of agricultural control and biological control can be adopted.
Destroy the living environment of pests through deep tillage and crop rotation, and at the same time use natural enemy insects or biological pesticides for prevention and control, and reduce the use of chemical pesticides.
At the critical moment, when the underground pests are "crazy" on duty, it is also necessary to choose the right chemical agents to carry out comprehensive chemical prevention and control of the underground pests in the green and live stage of corn.
Picture 09~10): Corn seedlings are back to green and live
It can be sprayed with 1200~1500 times of 20% avermectin chlorpyramide wettable powder, or 20% phoxanthion chlorpyrifos EC 2000~3000 times, or 6% avermectin chlorantraniliprole suspension 2000~2500 times, or 20.5% avermectin fipronide suspension 2000~3000 times and "Miao Qingqing", "Three Days Green", "Liangfengsu Zinc", "Xinfengyuan", "Fast Growth" and other multi-functional foliar fertilizers 25~50g/ The two-dimensional combination of bucket water is better treated with stems and leaves.
The low rate of regreening of maize seedlings is related to fertilizer damage:
01) Analysis of the reasons for the impact: the unreasonable fertilization method at the "regreening and living tree" period is also one of the important reasons for the low survival rate of maize transplanting.
Excessive fertilization or improper fertilization (corn seedlings and fertilizers in contact with fertilizer cause "root burning" and other phenomena) will cause soil nutrient imbalance and have a toxic effect on corn roots.
Picture 11~12): Corn seedlings are back to green and alive
02) The corrective measures are: in the process of fertilization, the principle of scientific fertilization should be followed, and the type and amount of fertilizer should be reasonably matched according to the soil nutrient status and corn growth needs.
At the same time, it is necessary to pay attention to the time and method of fertilization to avoid contact between fertilizer and corn roots, which will cause damage to corn roots.
When the "fertilizer damage" of corn plants is more serious, you can give corn plants an appropriate amount of watering to "dilute" the fertilizer damage. At the same time, with 20 ml/bucket of water and amino acids or humic acid multi-functional foliar fertilizer (preferably multi-functional foliar fertilizer containing rooting agent) 25g~50g/bucket of water two-way compound using stem and leaf treatment, it can be used 2~3 times in a row to correct the harm caused by "fertilizer" to corn seedlings and plants at the regreening and live tree stage.
Effects of other unfavorable factors on maize seedlings at the stage of regreening and living trees and countermeasures:
Picture 13~14): early vegetative growth of maize seedlings
In addition to the above-mentioned unfavorable factors, factors such as sudden low temperature counterattack, incorrect use of herbicides and soil salinization may also reduce the survival rate of maize transplanting.
The prolonged low temperature will inhibit the growth rate of maize and affect the rate of regreening and viability. Improper use of herbicides can also damage corn roots and leaves. For example, "amide herbicides", "benzoic acid herbicides", "triazine benzene herbicides", "dinitrobenzene herbicides", etc., improper use will cause a low "live tree rate" to transplanted corn seedlings.
Soil salinization will lead to problems such as soil compaction and nutrient imbalance. Corn plants are not suitable for growth and development in alkaline loam soils (suitable for slightly acidic sandy loams). In view of these factors, we can take measures such as mulching and insulation, correct and rational use of herbicides and soil improvement to improve the survival rate of maize transplanting.
Picture 15~16): Vigorous vegetative growth of maize seedlings
Words written at the end:
In conclusion, there are many reasons for the low rate of transplanted maize regreening and viability, including soil moisture, transplanting technology, underground pest damage, fertilizer damage and other environmental factors.
In order to improve the survival rate of maize transplanting, we need to start from many aspects and take comprehensive measures to prevent and control it.
By scientifically and rationally managing soil moisture, mastering transplanting technology, controlling underground pests, scientifically fertilizing and coping with the influence of other environmental factors, we can effectively improve the survival rate of maize transplanting and lay a solid foundation for high and stable maize yield.
Picture 17~18): Corn seedlings are rejuvenated and viable