不同生育期水分胁迫对枸杞耗水特性及果实品质的影响

Effects of Water Stress in Different Growth Stages on Water Consumption Characteristics and Fruit Quality of Wolfberry

以枸杞‘宁杞1号’为试材,在营养生长和盛花期(StageⅠ)、盛果期(StageⅡ)、秋果期(StageⅢ)进行一定程度的水分胁迫处理,采用统计学方法,研究了不同水分胁迫处理对植株耗水特性以及果实药用和营养品质的影响,以期得到最优水分生产条件。结果表明:水分胁迫显著降低了枸杞耗水量,降低幅度随水分胁迫程度的增加而增大;与充分灌溉相比,StageⅡ轻度水分胁迫后,在StageⅢ随着胁迫程度的加剧,枸杞多糖、总黄酮、甜菜碱、β-胡萝卜素和脂肪含量均有所增加,维生素C和蛋白质含量降低;StageⅡ中度水分胁迫后,StageⅢ伴随胁迫程度的加剧,枸杞多糖、总黄酮、甜菜碱、β-胡萝卜素、维生素C和蛋白质含量增加,脂肪含量降低;StageⅡ重度水分胁迫后,在StageⅢ随着胁迫程度的加剧,枸杞多糖、甜菜碱、β-胡萝卜素、维生素C和蛋白质含量随之增加,总黄酮和脂肪含量则有所降低。综合分析认为,在StageⅡ和StageⅢ进行中度或轻度亏缺,可兼顾灌溉的效率以及生产效益。

Taking‘Ningqi No.1’wolfberry as the test material,a certain degree of water stress was applied during the vegetative growth and full flowering(StageⅠ),full fruit period(StageⅡ),and autumn fruit period(StageⅢ).Using statistical methods,the effects of different water stress treatments on plant water consumption characteristics and fruit medicinal and nutritional quality were studied,in order to obtain the optimal water production conditions.The results showed that water stress significantly reduced the water consumption of wolfberry,and the reduction range increased with the increase of water stress.Compared with deficit irrigation,after StageⅡmild water stress,as the degree of stress intensified in StageⅢ,the content of wolfberry polysaccharides,total flavonoids,betaine,β-carotene and fat increased,while the content of vitamin C and protein decreased.After StageⅡmoderate water stress,with the intensification of the stress in StageⅢ,the content of wolfberry polysaccharides,total flavonoids,betaine,β-carotene,vitamin C and protein increased,and the fat content decreased.After StageⅡsevere water stress,with the intensification of the stress in StageⅢ,the content of wolfberry polysaccharides,betaine,β-carotene,vitamin C and protein increased,while the content of total flavonoids and fat decreased.Comprehensive analysis believes that moderate or mild deficits in StageⅡand StageⅢcan take into account the efficiency of irrigation and production benefits.