Effects of different film mulching on photosynthesis, transpiration rate and leaf water use efficiency of maize

Abstract

Abstract: To clarify the maize (Zea mays) yield-increasing mechanism of whole film mulching, two lines of furrow sowing were done in arid and semi-arid areas. Field experiments were carried out in 2009 to study the effects of five methods of film mulching on photosynthesis rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), leaf water use efficiency (LWUE) and grain yield. The Pn and Tr were highest at the bell-mouthed stage with single-peaked curves. The Pn, Gs, LWUE and grain yield under whole film mulching of two lines of furrow sowing (QS) were significantly higher than those of mulching lines of furrow sowing (QL), semi-film mulching two lines of furrow sowing (BS), semi-film mulching of tiling bunch sowing (BP) and no film mulching of bunch sowing (CK). The Gs was significantly positively correlated with Pn and Tr, while Pn was significantly correlated with Tr. The grain yield was significantly positively correlated with Pn, Gs, LWUE from seeding stage to bell-mouthed stage and Tr from bell-mouthed stage to milking stage. The results also showed that the QS treatment improved grain yield by 24.17%, 27.15%, 44.52% compared with QL, BS, BP and CK respectively and is currently the optimum pattern for maize film mulching in the Longdong area.

CLC Number:

S513
Q945.11

GAO Yu-hong, NIU Jun-yi, XU Rui, WANG Yan, LI Chang-jiang, QI Di. Effects of different film mulching on photosynthesis, transpiration rate and leaf water use efficiency of maize[J]. Acta Prataculturae Sinica, 2012, 21(5): 178-184.

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