摘要
通过对新疆巴州灌溉试验站香梨地在不同水分处理下土壤温度的监测,分析了不同水分处理下不同土层深度的温度连日变化和日变化趋势。分析结果显示:在5cm土层深度上高水、中水和低水分别比对照平均高出0.2℃、-0.2℃和1.8℃。各处理间地温差值随土层深度的增加而降低,其差值的峰值均出现在10:00—14:00,且温度增幅在5cm表层深度最大,其大小依次为高水>低水>对照>中水,最大差值分别是4℃,3.5℃,3℃和2℃。各处理在不同生育期均表现出先增大后减小的趋势,且表层5—10cm土层在花期到坐果期增幅大于其它时期,各处理中低水在不同生育期不同深度土层上的温度均值大于其它各处理,高水和对照在不同的生育期土壤温度有所差异,而对照在各处理不同生育期不同土层深度上均最小,且低水在8:00不同深度上地温变幅与深度可以拟合成相关系数很高的指数函数关系,分析结果表明低水处理的增温作用最为明显。
This article analyzed the different soil depth days of temperature change and the diurnal variation in the dif- ferent water treatments through the pear on the the Bazhou irrigation Experiment Station soil temperature monitoring in different water treatments. The results showed that the temperature in depth of 5 cm layer water, was average 0.2℃ and --0.2℃ and 1. 8℃ higher in high, medium and low water treatments, respectively, compared with the control. Ground temperature difference between the value of each treatment with increasing soil depth reduced, the difference peak occurred at 10：00 to 14：00, and the maximum temperature increase was observed in depth of 5 cm surface, the order is the high water, low water）control water, the maximum differences of temperature were 4℃, 3.5℃ and 3℃ and 2℃. Each treatment showed the trend of increase and then decrease at different growth stages, increases in 5--10 cm soil layer in the flowering to fruit set are greater than other periods, each treatment different depth of soil in low water at different growth stages the mean temperature is greater than the other treatments, soil temperatures of high water and control treat- ments are different at each growth stage, and temperature of control in different soil depth, each treatment at different growth period is minimum, and the relationship between temperature change of the low water treat- ment at different depths at 8：00 and depth can be fitted by the exponential function with very high correlation coefficient, the analysis showed that the warming effect of the low-water treatment is the most obvious.
出处
《水土保持研究》
CSCD
北大核心
2013年第5期150-154,159,共6页
Research of Soil and Water Conservation
基金
新疆自治区科技重大专项(201130103-1)
国家科技支撑计划(2011BAD29B05)
关键词
香梨
滴灌
土壤温度
pear
drip irrigation
doil temperature
