Anhui Province is located in the superimposed area of ​​the north-south climate transition zone and the marine land climatic zone. Frequent natural disasters cause great changes in the yield of summer maize. There are many ecological factors affecting the growth and development of summer maize, among which are climatic factors and human factors. Climate factors include: temperature, light, solar radiation, moisture, and air. The impact of human factors on farmland crops is mainly reflected in the measures taken in human production activities, such as planting methods, sowing rates, and plant management measures. To grasp the climatic factors that affect the fluctuation of corn production, seek advantages and avoid disadvantages, and adopt management measures to ensure the high yield and stable production of summer corn. Row spacing has already carried out some researches on the yield, but there has been no report on the effect of microclimate on maize yield under different row spacing conditions of the same variety. The hand-held meteorological station can facilitate the efficient determination of corn planting environment.
The grain filling stage after corn silking, that is, two years from August 17 to September 10, was observed for 50 days, and the first ear position was highest at 8:00, 14:00, and 20:00 in each day. Perform fixed observations of the microclimate in the field. Four processes are performed at the same time. The temperature, humidity, and wind speed were measured using a hand-held meteorological station NK4000; the amount of effective light was measured using a photo quantum meter (3415F).
During the same year, as the row spacing increased, the daily average temperature in the group gradually decreased. The humidity in the groups with different row spacings also differs, the row spacing increases, and the relative humidity within the group decreases. The changes in humidity and temperature are relatively consistent. The reason may be that the 50 cm line spacing is narrow and the ventilation is poor, resulting in reduced ground transpiration and high temperature and humidity. The wind speed increases as the row spacing increases. The wind regulates the moisture and heat in the corn population and affects the temperature and humidity. The change of daily light intensity for each treatment was T80>T70>T60>T50. It can be seen that the light energy per unit area of ​​50 centimeters is high and the yield is the highest, which means that the light utilization rate per unit area is decreasing with the increase of line spacing.
Through the measurement and research of hand-held meteorological station, it was found that changes in plant spacing arrangement had a significant effect on maize yield and microclimate in the field. Row spacing had a significant effect on corn yield. Row spacing was 50 cm and the yield was the highest. The output in 2011 and 2012 were 10,551 respectively. 75kg/hm2, 9453.3kg/hm2. The yield of each treatment was: T50>T60>T70>T80. The results of the two-year test were consistent. Corn originates in the tropics and is a high-temperature, high-efficiency crop. It has certain requirements for humidity, temperature, light, and wind speed. The 50 cm culture method has a small row spacing, and the large daily average temperature, relative humidity and small wind speed are The transpiration is reduced, the small transpiration maintains a certain humidity, avoids water deficits during corn milking and grain filling, and the population density at the 50 cm line spacing reduces the loss of light leakage. The solar radiation absorbed by leaves per unit area Large, further increase the utilization of light energy. Comprehensive comparison shows that the 50 cm row spacing of the planting structure is relatively stable and can fully utilize light for photosynthesis and organic matter production. Therefore, the field microclimate at 50 cm spacing is conducive to the growth and development of Longping 206, and the high-yield potential is better played.
The grain filling stage after corn silking, that is, two years from August 17 to September 10, was observed for 50 days, and the first ear position was highest at 8:00, 14:00, and 20:00 in each day. Perform fixed observations of the microclimate in the field. Four processes are performed at the same time. The temperature, humidity, and wind speed were measured using a hand-held meteorological station NK4000; the amount of effective light was measured using a photo quantum meter (3415F).
During the same year, as the row spacing increased, the daily average temperature in the group gradually decreased. The humidity in the groups with different row spacings also differs, the row spacing increases, and the relative humidity within the group decreases. The changes in humidity and temperature are relatively consistent. The reason may be that the 50 cm line spacing is narrow and the ventilation is poor, resulting in reduced ground transpiration and high temperature and humidity. The wind speed increases as the row spacing increases. The wind regulates the moisture and heat in the corn population and affects the temperature and humidity. The change of daily light intensity for each treatment was T80>T70>T60>T50. It can be seen that the light energy per unit area of ​​50 centimeters is high and the yield is the highest, which means that the light utilization rate per unit area is decreasing with the increase of line spacing.
Through the measurement and research of hand-held meteorological station, it was found that changes in plant spacing arrangement had a significant effect on maize yield and microclimate in the field. Row spacing had a significant effect on corn yield. Row spacing was 50 cm and the yield was the highest. The output in 2011 and 2012 were 10,551 respectively. 75kg/hm2, 9453.3kg/hm2. The yield of each treatment was: T50>T60>T70>T80. The results of the two-year test were consistent. Corn originates in the tropics and is a high-temperature, high-efficiency crop. It has certain requirements for humidity, temperature, light, and wind speed. The 50 cm culture method has a small row spacing, and the large daily average temperature, relative humidity and small wind speed are The transpiration is reduced, the small transpiration maintains a certain humidity, avoids water deficits during corn milking and grain filling, and the population density at the 50 cm line spacing reduces the loss of light leakage. The solar radiation absorbed by leaves per unit area Large, further increase the utilization of light energy. Comprehensive comparison shows that the 50 cm row spacing of the planting structure is relatively stable and can fully utilize light for photosynthesis and organic matter production. Therefore, the field microclimate at 50 cm spacing is conducive to the growth and development of Longping 206, and the high-yield potential is better played.
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