植物学报2018，Vol.53Issue(3)：322-333,12.DOI:10.11983/CBB17030
调亏灌溉对菘蓝水分利用及产量的影响
Effect of Regulated Deficit Irrigation on Water Use and Yield of Isatis indigotica
摘要
Abstract
A field experiment was conducted to test the effect of mulched drip irrigation under water deficit regulation on the physiological indexes, yield and water use in the Hexi region, which would provide theoretical guidance for efficient high efficiency water saving. We used experiments with Isatis indigotica in different amounts of irrigation and growth stages in the Yimin Irrigation District of Gansu Province in 2016. With seedling stage and fleshy root maturity stage under normal water conditions, we measured the physiological indexes yield and water use under mild, moderate and severe water deficit treatments in the vegetative and fleshy root growth stages. The leaf photosynthetic rate (Pn), leaf area index, plant height and root length of I. indigotica were significantly reduced by water deficit regulation in the vegetative and fleshy root growth stages, with greater decrease with aggravated water deficit degree, but the difference with mild water deficit treatments was not significant. The yield and water use efficiency of I. indigotica root with mild water deficit treatment were 8 239.56 kg·hm-2 and 24.11 kg·hm-2·mm-1, respectively. With other water deficit treatments reduced, there were significant differences between the control group (P<0.05), severe water deficit treatment being the lowest. Thus, optimal water regulation is mild water-deficit treatment of vegetative and fleshy root growth stages to reduce water consumption, and improving the efficiency of water use does not reduce its production.关键词
水分调亏/膜下滴灌/生长动态/产量/水分利用效率/菘蓝Key words
water deficit/mulched drip irrigation/growth dynamic/yield/water use efficiency/isatis indigotica引用本文复制引用
王玉才,张恒嘉,邓浩亮,王世杰,巴玉春..调亏灌溉对菘蓝水分利用及产量的影响[J].植物学报,2018,53(3):322-333,12.基金项目
国家自然科学基金(No.51669001)、甘肃农业大学盛彤笙科技创新基金(No.GSAU-STS-1744)、甘肃省高等学校基本科研业务费(No.2012)和甘肃农业大学水利水电工程学院青年基金(No.SLSDXY-QN2018-02) （No.51669001）
