摘要
【目的】研究分根区交替灌溉条件下水肥供应对番茄可溶性糖含量的影响。【方法】采用五元二次正交旋转组合设计,通过盆栽试验,研究根系分区交替灌溉条件下,灌水量及氮、磷、钾肥和有机肥用量对番茄果实中可溶性糖含量的影响。通过回归分析,建立了番茄果实可溶性糖含量与水肥因子的数学模型,并对各单一因素及两两因素的耦合效应进行了分析。【结果】在供试条件下,当其他因子为中间水平时,番茄果实可溶性糖含量与灌水量、施磷量和有机肥用量呈线性正相关关系;随着施钾量的增加,可溶性糖含量呈开口向下的抛物线型变化,但其不受施氮量的明显影响。5个因素对番茄可溶性糖含量的交互效应表现为:施氮量与施磷量、施钾量,施钾量与有机肥用量间呈负交互作用;施氮量与有机肥用量、施磷量与施钾量间呈正交互作用。表明灌水量及氮、磷、钾和有机肥用量,通过单因素本身或与其他因素之间的交互作用,对番茄果实可溶性糖含量产生显著影响。【结论】根系分区交替灌水条件下,适当增大灌水量,氮肥与有机肥、磷肥与钾肥以及高量有机肥与少量钾肥配施,均可以明显提高番茄果实中的可溶性糖含量。
【Objective】 The effects of irrigation and fertilizer amounts on soluble sugar contents of tomato were investigated under alternate partial root-zone irrigation.【Method】 Using a quadratic orthogonal regressive rotation design with five factors,the effects of irrigation water amount and fertilizer amounts including nitrogen,phosphorus,potassium and manure on soluble sugar contents of tomato were investigated by pot experiment under alternate partial root-zone irrigation.A regression model on water and fertilizer amounts and soluble sugar contents of tomato was established.Single and coupling effects of all five experimental factors were analyzed.【Result】 For the soil and tomato variety used in the experiment,the relationship between soluble sugar contents and K fertilizer amounts could be estimated as a second-degree parabola with open side down when other factors were at intermediate levels.Soluble sugar contents increased linearly with irrigation,P fertilizer and manure amounts,but were not affected by N fertilizer amounts.The interactions between the fertilizer amounts of N,P or K,between K and manure showed negative effects while the interactions between N fertilizer and manure amounts and between P and K fertilizer amounts were positive.【Conclusion】 The results suggested that irrigation amount and fertilizer amounts of N,P,K and manure significantly influenced soluble sugar contents in tomato through single factor or their interactions.Under the condition of alternate partial root-zone irrigation,increasing the amount of irrigation in a proper way,application of N and manure,K and P,and a high level of manure and a small amount of K can significantly improve soluble sugar contents in tomato.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2013年第3期124-132,共9页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家自然科学基金项目(51279169)
国家"863"计划项目(2011AA100504)
关键词
分根区交替灌溉
五元二次正交旋转组合设计
可溶性糖
灌水量
施肥量
番茄
alternate partial root-zone irrigation
quadratic orthogonal regressive rotation design with five factors
soluble sugar content
irrigation amount
fertilizer amounts
tomato
