草业学报2012，Vol.21Issue(5)：178-184,7.
不同覆膜方式对玉米叶片光合、蒸腾及水分利用效率的影响
Effects of different film mulching on photosynthesis, transpiration rate and leaf water use efficiency of maize
摘要
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.关键词
覆膜方式/光合速率/蒸腾速率/叶片水分利用效率(LWUE)/籽粒产量Key words
film mulching patterns/photosynthesis rate/transpiration rate/leaf water use efficiency (LWUE) /grain yield分类
农业科技引用本文复制引用
高玉红,牛俊义,徐锐,王彦,李长江,祁迪..不同覆膜方式对玉米叶片光合、蒸腾及水分利用效率的影响[J].草业学报,2012,21(5):178-184,7.基金项目
国家自然科学基金项目(30960187)资助. （30960187）
