摘要
采用雾培法研究营养液氮(N 2、12、22mmol/L)、钾(K 4、8mmol/L)供应水平对2个番茄品种(盆栽红、盆栽黄)果实产量、品质及抗氧化活性的影响.结果表明:番茄果实的直径、座果率、产量、可溶性糖、可溶性固形物、类胡萝卜素、β-胡萝卜素和番茄红素含量以及DPPH(1,1-diphenyl-2-picrylhydrazyl,二苯代苦味酰基)自由基清除率、ABTS)[2,2′-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid),2,2′-连氮基-双-(3-乙基苯并噻唑啉-6-磺酸]总抗氧化能力随着供氮水平的提高呈先升高后下降的趋势,均在12mmol/L供氮水平时达到最高水平;果实可滴定酸和硝酸盐含量随供氮水平提高逐渐增加,而抗坏血酸、类黄酮和总酚含量逐渐降低,在12mmol/L供氮水平时可维持较高的抗坏血酸、类黄酮和总酚含量以及较低的硝酸盐含量.供钾水平从4mmol/L提高到8mmol/L,可在提高果实产量的同时增加可溶性糖、可溶性固形物、抗坏血酸、类黄酮、总酚、β-胡萝卜素、番茄红素和类胡萝卜素含量,并显著降低硝酸盐含量.盆栽红的产量、抗氧化物质含量、抗氧化活性显著高于盆栽黄.综上,选择盆栽红为栽培品种,雾培营养液供应12mmol/L氮和8mmol/L钾,可获得较高的果实产量、风味品质和抗氧化营养品质,并保持较低的硝酸盐含量.
Tomato （Lycopersicon esculentum Mill. ） fruit is one of the most consumed vegetables in the world. This vegetable is rich in minerals and human health-benefiting compounds, and thus long-term consumption of tomato fruits facilitates to reduce the incidences of cardiovascular disease and prostate cancer. Therefore, developing strategies to improve the tomato production should have great potential applications and significance in human health. Numerous studies have provided evidences that nutrition management is a key agronomic strategy to improvethe yield and nutritional quality of vegetables. Accordingly, previous studies have investigated the effects of application of nitrogen （N） or potassium （K） alone on the yield and the quality of tomato fruits in hydroponics systems. However, the effects of combined application of the above two nutrients still remain largely unknown up to now. Furthermore, conventional hydroponic cultivation often results in oxygen deficiency of roots which would cause anoxia of the roots. Aeroponics is a system of advanced soiltess culture technologies. It not only avoids the oxygen deficiency of roots, but also can efficiently meet the nutrient requirement of crops. The objective of this study was to investigate the combined effects of N and K on the yield and nutritional quality of tomato fruits in aeroponic cultivation.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2013年第5期489-496,共8页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家高技术研究发展计划(863计划)资助项目(SS2013AA101007)
国家自然科学基金资助项目(30971859)
浙江省科技大专项资助项目(2010E70002)
国际植物营养研究所(IPNI)资助项目
浙江省大学生科技创新项目计划(2012R401121)
关键词
雾培
番茄
氮
钾
营养品质
抗氧化活性
aeroponics
tomato （Lycopersicon esculentum Mill. ）
nitrogen
potassium
nutritional quality
antioxidant activity
