| Effect of mycorrhizal fungi inoculation and nitrogen fertilization on physiological characteristics, growth, and nitrogen and phosphorus uptake of wheat under two distinct water regimes |
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| DOI：10.7606/j.issn.1000-7601.2019.01.30 |
| Key Words: wheat growth drought mycorrhizae fungi nitrogen fertilizer nitrogen uptake phosphorus uptake water use efficiency |
| Author Name | Affiliation | | ZHANG Bei-bei | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China | | ZHANG Hui | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China | | JING Qi | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China | | WU Yue-xuan | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China | | XIAO Si-ze | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China | | Wang Miao-miao | Key Laboratory of Disaster Survey and Mechanism Simulation of Shaanxi Province / College of Geography and Environment, Baoji University of Arts and Sciences , Baoji, Shannxi 721013, China |
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| Abstract: |
| In order to explore the effects of mycorrhizal fungi (AMF) inoculation and N fertilization （0 kg·hm-2 and 180 kg·hm-2）on wheat growth, WUE, nutrient uptake under different water regimes, well-watered (WW) and water-deficit (WD), a greenhouse experiment was conducted and relationships among the phosphorus (P), N concentration of stem, seed, and WUE were also analyzed. The results showed that the specific leaf area (SLA) of flag leaves was significantly increased by AMF inoculation under the two water regimes while the SLA was lowered under N fertilization and the relative water content (RWC) was increassed under drought conditions. Nitrogen fertilization significantly increased the leaf Pn and Tr but AMF inoculation only significantly increased the Pn under N fertilization and AMF inoculation by 31% under water-deficit condition compared to CK. The WUE and instantaneous WUE (WUEi) were enhanced by N fertilization and AMF inoculation under both water conditions. Under water-deficit condition, the wheat WUE increased by 13.02% and 1.17% , respectively, under the inoculation of AMF and N fertilization. In addition, the leaf carbon isotope discrimination (CID) was also increased under different treatments. Combined N fertilization and AMF inoculation significantly increased N concentrations in wheat stem and grain, plant height, biomass, and grain yield under water-deficit situation. The P concentrations in stem and grain were also increased. In addition, the WUE was positively correlated with grain N, and stem N, P concentrations. In general, the plant physiological characters were decreased by water-deficiency but improved by N fertilization and AMF inoculation under water-deficiency. |
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