JIA-2019-11

2479 ZHANG He et al. Journal of Integrative Agriculture 2019, 18(11): 2472–2482 d c b a a b d c b a a b d c ab a a b e d c a a b e d c a a b d c c a a b 0 15 30 45 60 2014–2015 SPAD Groundwater depth (m) 2013–2014 0.7 1.1 1.5 1.9 2.3 2.7 0.6 1.0 1.4 1.8 2.2 2.6 JS BS FS Fig. 6 The SPAD readings of wheat flag leaves at the jointing stage (JS), booting stage (BS), and filling stage (FS). All values are means of three replications±standard error; values followed by different lowercase letters within the same style columns are significantly different at P <0.05 probability level. e d b a a c e d b a a c e d b a a c e d c a a b e d c a a b e d c a a b 0 7 14 21 28 2014–2015 P n (μmol CO 2 m –2 s –1 ) Groundwater depth (m) 2013–2014 0.7 1.1 1.5 1.9 2.3 2.7 0.6 1.0 1.4 1.8 2.2 2.6 JS BS FS Fig. 7 The net photosynthetic rate ( P n ) of wheat flag leaves at the jointing stage (JS), booting stage (BS), and filling stage (FS). All values are means of three replications±standard error; values followed by different lowercase letters within the same style columns are significantly different at P <0.05 probability level. e d c a b c e d b a a c e d b a a c e d c a b c e d b a a c f e d b a c e d c a a b e d c a a b e d c b a c e d c a a b 0 500 1 000 1 500 2 000 Leaf area per plant (cm 2 ) Groundwater depth (m) SS JS 2013–2014 BS FS RS 0.7 1.1 1.5 1.9 2.3 2.7 0.6 1.0 1.4 1.8 2.2 2.6 2014–2015 Fig. 5 The leaf area per plant at the seedling stage (SS), jointing stage (JS), booting stage (BS), filling stage (FS), and ripening stage (RS). All values are means of three replications±standard error; values followed by different lowercase letters within the same style columns are significantly different at P <0.05 probability level.