The Mensuration And Analysis On 3 Kinds Of Solar Greenhouse Performance In Aral

The environment parameters such as temperature,illumination intensity and humidity were measured from November 2015 to February 2016 in three kinds of solar greenhouses( brick-and-cement, mud wall and straw bale)of Aral.The paper used these date to analyze and compare the environment performance of 3 kinds sun-light greenhouses. The results showed as follow:1.The result of monitoring the temperature of 3 kinds solar greenhouse showed that in average temperature of 3 kinds solar greenhouse from November to February,November is the highest,January is the lowest.The highest average temperature in autumn and winter was the greenhouse of Ⅰwhich was14.74℃, the lowest average temperature was the greenhouse of Ⅲ which was 12.63℃,the average temperature ofⅡ greenhouse was 13.95℃.The data of daily-variety indicated that the temperature of 3kinds solar greenhouse changed with the changes of outdoor temperature.The average temperature and the daily range of temperature both were sunny days>cloudy days>snowy days.Ⅰgreenhouse’s average temperature was highest,but the rising or dropping rate of temperature was slowest.These showed that theⅠgreenhouse of had best performance for keeping temperature in autumn and winter, Ⅱgreenhouse came second,Ⅲ greenhouse’s average temperature had the lowest temperature was the lowest and the rising or dropping rate of temperature was the fastest.2.The result of monitoring the illumination intensity of 3 kinds solar greenhouse showed that indoor and outdoor illumination intensity first increased and then decreased and finally increased as the month goes on.The average illumination intensity of January was the lowest and the February was the highest.From December to February,the illumination intensity of Ⅰgreenhouse was the highest andⅡgreenhouse was the lowest,but it was not included December.The day change trend of the indoor illumination intensity was basically consistent with the outdoor illumination intensity.The trend which was first increased and then declined showed that the illumination intensity changed with the the solar altitude angles.The average illumination intensity and the transmittance both wereⅠgreenhouse >Ⅱgreenhouse > Ⅲ greenhouse.The average illumination intensity of 3 kinds of solar greenhouse was47000 Lux,43000Lux and 40000 Lux.Taken together,light environment of Ⅰgreenhouse was the best,closely followed by Ⅱgreenhouse,and Ⅲ greenhouse is the worst.3.The result of monitoring the air humidity of 3 kinds solar greenhouse showed that the diurnal variation of air humidity was like a U-shaped curve, whether it was or sunny or cloudy day.This trend was contrary to the trend of temperature.Compare to the cloudy day,the humidity change of sunny day was more obvious and the average humidity was lower.Uncovering the quilts was the chief cause which influenced the humidity changed largely.In 5 hours from 10:30 when the quilts were uncovered to 15:30when the humidity of a day reached the the minimum,humidity rate of decline of 3 kinds of sun-light greenhouse was 4%/h 、 4.8%/h and 6.9%/h.It was illustrated that dehumidified effectiveness ofⅠgreenhouse was the best,Ⅱgreenhouse was the second,and Ⅲ greenhouse is the most poor.The average humidity of Ⅰ,Ⅱand Ⅲ greenhouse was 78.8%,78.33% and 74.10%,we should reduce or increase the humidity as tomatoes which were in different growth periods required.4.The result of monitoring the soil temperature of 3 kinds solar greenhouse showed that from December2015 to February 2016,the average soil temperature of 3 kinds of greenhouse was first decreased and then increased every month.In monthly mean soil temperature,the soil temperature of Ⅰgreenhouse was the highest,and the Ⅲ greenhouse was the lowest.Especially in January which average soil temperature was the lowest,theⅠgreenhouse soil temperature at the depth of 5cm was about 3℃ higher than Ⅲ greenhouse.The change trend of soil temperature during the time from quilts were uncovered to covered was as same as the air temperature no matter it was sunny day or cloudy day.The soil temperature was first decreased and then increased,but the deeper the layers of soil were,the later the time when the soil temperature reached the maximum.The average soil temperature of Ⅰgreenhouse was the highest and the temperature variations were biggest,closely followed by Ⅱgreenhouse,The average soil temperature of Ⅰgreenhouse was the lowest and the temperature variations were smallest.