塑料大棚覆盖对库尔勒香梨低温冻害防御的研究

Study on the Defense of Korla Fragrant Pear's Low Temperature Freezing Injury from the Cover of Plastic Greenhouse

利用2013年12月15日至2014年2月13日在库尔勒市西南上户镇香梨树大棚内外离地40,80 cm高度温度、相对湿度气象资料,对比分析大棚内外不同部位微气候差异.结果表明,40 cm高度晴天和阴天平均温度棚内比棚外分别高出1.7,1.3 ℃;40 cm高度晴天均湿差为10.4％,相对湿度棚内大于棚外,阴天均湿差为11.7％,相对湿度棚内小于棚外;晴天80 cm高度均湿差为10.2％,阴天为12.0％,高出晴天1.8％;棚内外40,80 cm高度日均温差都为0.8℃,日均湿差分别为9.0％和9.2％;棚内外40～80 cm高度最低温差均值都为0.2℃,最低湿差分别为0.6％和0.8％;40,80 cm高度棚内最低温度分别比棚外高出0.4,0.2℃,最低相对湿度分别高出3.0％和2.6％.

Based on the meteorological data of different temperatures and relative humidity of 40, 80 cm plastic greenhouse planted fragrant pear trees in the southwest of Korla from December 15, 2013 to February 13, 2014, this thesis aims to analyse the microclimate differences in plastic greenhouses inside and outside. The results show that the average temperatures inside during sunny day and cloudy day in 40 cm plastic greenhouse are higher than outside, which are 1.7,1.3 ℃, respectively. During sunny day, 40 cm average humidity is 10.4%, relative humidity inside of plastic greenhouse is higher than outside; the average humidity is 11.7% during cloudy day, relative humidity outside of plastic greenhouse are higher than inside. While in 80 cm plastic greenhouse, the average humidity is 10.2%, 12.0% during cloudy day is higher by 1.8% than sunny day. In 40, 80 cm plastic greenhouse, the daily mean temperature difference is both 0.8 ℃, the daily average humidity difference is 9.0% and 9.2%. The lowest average temperature difference is 0.2 ℃ in 40-80 cm outside and inside, the lowest humidity difference is 0.6% and 0.8%. The lowest temperatures inside in 40, 80 cm are higher by 0.4, 0.2 ℃ resnectivelv than outside. The lowest relative humiditv is hiuher than bv 3.0% and 2.6%. respectively.