中国生态农业学报2017，Vol.25Issue(9)：1317-1325,9.DOI:10.13930/j.cnki.cjea.170174
北方烟区水肥一体化对烤烟生长、根系形态、生理及光合特性的影响
Effects of water and fertilizer integration on growth, morphology, physiology and photosynthetic characteristics of flue-cured tobacco in the North China
摘要
Abstract
Drought stress inhibits the growth and development of flue-cured tobacco in the North China, resulting in lower yield and quality. The purpose of this study was to determine the effects of integration of water and fertilizer on the growth and development, root morphology and physiology, and on photosynthetic characteristics of flue-cured tobacco in the North China. The differences in agronomic attributes, dry matter accumulation, root morphology and physiology, photosynthesis, chloro-phyll fluorescence and economic characteristics of 'Yunyan 87' flue-cured tobacco grown under water and fertilizer integration, and conventional irrigation and fertilization were investigated. The results showed that compared with conventional irrigation and fertilization, the growth and development of flue-cured tobacco was significantly promoted under water and fertilizer in-tegration and with better agronomic attributes. The integration of water and fertilizer significantly increased dry matter accu-mulation in the belowground and aboveground parts of the plant. It also improved the indices for root morphology and physi-ology in terms of root volume, total root absorption area, root active absorption area, root specific surface area, root activity and ATPase activity. All these attributes were significantly higher than those under conventional irrigation and fertilization. The integration of water and fertilizer also reduced root to shoot ratio (P< 0.05). Meanwhile, net photosynthetic rate (Pn), stomatal conductance(Gs), intercellular CO2concentration(Ci), water use efficiency (WUE), PSII maximal photochemical effi-ciency (Fv/Fm), PSII actual photochemical efficiency (ΦPSⅡ)and photochemical quenching coefficient (qP) all significantly in-creased under the integration of water and fertilizer (P< 0.05). On the contrary, both transpiration rate (Tr) and non-photochemical quenching coefficient (NPQ) significantly decreased under the integration of water and fertilizer (P< 0.05). Furthermore, the economic characteristics were significantly higher under the integration of water and fertilizer than those under conventional irrigation and fertilization (P< 0.05). In conclusion, the results indicated that the integration of water and fertilizer supported good root morphology and significantly improved root physiology activity, photosynthesis and light energy utilization efficiency. This stimulated the growth and development of flue-cured tobacco, resulting in higher economic characteristics.关键词
水肥一体化/烤烟/根系形态生理/光合特性/叶绿素荧光/经济性状Key words
Water and fertilizer integration/Flue-cured tobacco/Root morphology and physiology/Photosynthetic characteristics/Chlorophyll fluorescence/Economic characteristics分类
农业科技引用本文复制引用
霍昭光,孙志浩,邢雪霞,卫宣志,李晓辉,刘超,薛刚,徐世晓,杨铁钊..北方烟区水肥一体化对烤烟生长、根系形态、生理及光合特性的影响[J].中国生态农业学报,2017,25(9):1317-1325,9.基金项目
中国烟草总公司河南省公司科技项目(HYKJZD201401)资助 This work was supported by the Project of Henan Provincial Tobacco Company (HYKJZD201401). （HYKJZD201401）
