【摘要】 为了探索地下滴灌作物适宜的埋管深度和土壤水分调控方法,以番茄为试材,研究了地下滴灌埋管深度为20 cm和40 cm条件下,控制地面20 cm深度处5个不同土壤基质势下限(-10、-20、-30、-40、-50 kPa)对番茄产量、品质和灌溉水利用效率等的影响。结果表明,在2个埋管深度下,控制地面20 cm深度处的土壤基质势在-40 kPa以上时,番茄的产量和灌溉水利用效率最高。在该土壤基质势控制条件下,埋管深度为20 cm时灌溉水利用效率比埋管深度为40 cm时高62%;而埋管深度为40 cm时番茄果实可溶性糖和糖酸比更高。生产中建议埋管深度为20 cm,并保持控制地面20 cm深度处的土壤基质势在-40 kPa以上。更多还原

【Abstract】 In order to explore the proper lateral depth and soil moisture control method of underground drip irrigation for tomato,experiments were carried out to study the response of tomato fruit quality,yield and irrigation water use efficiency with five soil matric potential treatments(the soil matric potential at 20 cm depth underground was kept higher than-10,-20,-30,-40,-50 kPa,respectively) under underground drip irrigation and the lateral depth were 20 and 40 cm.The results showed that when soil matric potential at 20 cm depth was kept higher than -40 kPa,the maximum tomato yield and irrigation water use efficiency were obtained for the two lateral depths;the irrigation water use efficiency of the lateral depth at 20 cm was 62% higher than that of lateral depth at 40 cm.However,content of soluble sugar and ratio of sugar to acid of tomato were relative high when the lateral depth was 40 cm.Lateral depths at 20 cm was recommended,and the soil matric potential at 20 cm depth should be kept higher than-40 kPa to schedule irrigation.更多还原