摘要
本文通过1996—1997年小麦越冬试验，研究了北京地区喷灌麦田越冬期间0～60cm土壤水分及小麦分蘖节深度处（2cm）土温变化规律，并分析了影响土壤冻深的因素。本文在田间试验的基础上，总结了喷灌补水时期的确定原则，并首次提出补水量的估算公式。试验证明，早春适时适量喷灌补水是防御旱冻的有效途径。
Through overwintering experiments of winter wheat in 1996 -- 1997, this paper reported the studies on the variation law of soil water content in the layer of 0--60 cm and soil temperature at depth of tillering node (2 cm), and analyzed the factors to influence soil freezing depth during overwintering period in Beijing area. Based on field experiments, this paper summarized the principles to determine date and time of supplementing water by spray irrigation in early spring, and put forward an equation to estimate the quantity of supplementary water for the first time. The results showed that supplementing water by spray irrigation in early spring is an effective approach to alleviate drought-freezing injury of winter wheat.
出处
《宁夏农学院学报》
1998年第2期45-54,共10页
Journal of Ningxia Agricultural College
关键词
冬小麦
越冬
水热状况
旱冻
喷灌
防御途径
winter wheat
overwintering
water and heat condition
drought-freezing injury
spray irrigation
