In recent years, most studies on chilling injury of cotton have focused on the delayed-type cold injury indicators of cotton. Using the meteorological observation data of the cotton field in the cotton area during the past ten days and the growth and development observation data of cotton, it has been analyzed that a certain period of time (more than ten days) is insufficient for the thermal conditions. The impact of growth and yield; on the study of cotton chilling hazards, some scholars analyze the weather causes of the chilling hazards of the obstacles, and some scholars find out the chilling injury factors of cotton based on the meteorological factors of the chilling injury when the obstacles occurred. Another analysis of the correlation between cotton yield and meteorological factors in Shaanxi shows that the more days when the extreme minimum temperature is ≤18°C, the more bells and sheddings increase. Using an artificial climate box to control temperature, humidity, and light intensity to simulate changes in temperature and humidity during the cold weather in the Shihezi cotton area of ​​northern Xinjiang, and using different light intensity treatments for comparative experiments to study the dominant meteorological conditions that cause cotton chilling injury in Shihezi cotton area. The factors and their effects on cotton growth are intended to provide a theoretical basis for further revealing the mechanism of cold chilling injury in cotton and for studying the impact of cold chilling on cotton growth.
In the Ulanwusu Agricultural Meteorological Experimental Station (44°17′N, 85°49′E, altitude 466.2m) in the Shihezi cotton area, intelligent artificial climate chambers were used to simulate different temperatures and light conditions. In 2003, local planting varieties Zhongmian No. 35 and Zhongmian 36 were selected to conduct sowing planting experiments in 6 sowing dates (pot diameter: 28cm, inner diameter 24cm, depth 27cm). In the test field about 30m northeast of the meteorological observatory, a cotton sample for each pot is obtained after the seedling is set. The value of the environmental meteorological element is replaced by the meteorological element value measured at the station at that time.
Through the cultivation of artificial climate chambers, it was found that cotton in Shihezi cotton area suffered abnormally falling leaves, buds, and young bells after the flowers were subjected to abnormally low temperatures at the flowering and boll stage, but the number of leaves was not removed from the climate chamber. Significant reductions were mostly on the 4th day after treatment. The number of leaves was significantly lower than that of the control. The buds and young bells were significantly reduced compared to the control after they were removed from the climate chamber. Youngster's response to low temperature.
In the Ulanwusu Agricultural Meteorological Experimental Station (44°17′N, 85°49′E, altitude 466.2m) in the Shihezi cotton area, intelligent artificial climate chambers were used to simulate different temperatures and light conditions. In 2003, local planting varieties Zhongmian No. 35 and Zhongmian 36 were selected to conduct sowing planting experiments in 6 sowing dates (pot diameter: 28cm, inner diameter 24cm, depth 27cm). In the test field about 30m northeast of the meteorological observatory, a cotton sample for each pot is obtained after the seedling is set. The value of the environmental meteorological element is replaced by the meteorological element value measured at the station at that time.
Through the cultivation of artificial climate chambers, it was found that cotton in Shihezi cotton area suffered abnormally falling leaves, buds, and young bells after the flowers were subjected to abnormally low temperatures at the flowering and boll stage, but the number of leaves was not removed from the climate chamber. Significant reductions were mostly on the 4th day after treatment. The number of leaves was significantly lower than that of the control. The buds and young bells were significantly reduced compared to the control after they were removed from the climate chamber. Youngster's response to low temperature.
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