施氮量与地膜覆盖对长江中游春玉米产量性能及氮肥利用效率的影响

doi:10.3724/SP.J.1006.2014.01081

Abstract

Abstract:

A two-year field experiment using maize hybrid Yidan 629 with nitrogen(N) application and film mulching was conducted in Wuxue, Hubei Province, during 2012–2013 growing season to study the characteristics of yield performance parameters and N use efficiency of spring maize in the middle reaches of Yangtze River. The results showed that film mulching could make an earlier seed germination times of 7–8 d, N application and film mulching could promote the vegetative growth of spring maize, the tasseling stage and silking stage were advanced 8–12 d and 6–11 d, respectively, the maturity stage advanced 2–7 d and the physilogical maturity stage advanced 3–6 d. Compared with the control, the yield performance parameters of spring maize such as mean leaf area index (MLAI), mean net assimilation rate (MNAR), harvest index (HI), grain number per ear (GN) and 1000-kernels weight (GW) increased by 81.18%–112.38%, 19.20%–25.82%, 72.61%–95.30%, and 13.09%–21.26% in N application treatment, and increase 11.12%–17.12%, 0.80%–10.66%, 0.44%–6.50%, 7.02%–16.07%, and 5.64%–7.93% in film mulching treatment. With the super compensative effect of yield performance parameters, the grain yield of spring maize increased by 6.80%–24.66% and 7.16%–22.19%, respectively, resulting from N application and film mulching. The N use efficiency was significantly reduced with increasing N application, the partial factor productivity (PFPN) and nitrogen agronomic efficiency (ANUE) were decreased 31.34%–51.20% and 30.39%–42.12%. Film mulching enhanced N absorbing ability of spring maize, and increased PFPN and ANUE 18.30%–31.67% and 25.83%–56.80%, respectively. Comprehensive considering the super compensative effect of yield performance parameters and the characteristics of N use efficiency, achieving high yield of 8995–9220 kg ha^-1in spring maizeneeds the N application of 202.5–270 kg ha^-1 with film mulching in the middle reaches of Yangtze River.

Key words: Spring maize, Nitrogen application, Film mulching, Yield performance parameters, Nitrogen use efficiency

GE Jun-Zhu,LI Shu-Ya,ZHONG Xin-Yue,YUAN Guo-Yin,XU Ying,TIAN Shao-Yang,CAO Cou-Gui,ZHAI Zhong-Bing,LIU Shi-Qing,ZHAN Ming,ZHAO Ming. Effects of Nitrogen Application and Film Mulching on Yield Performance Parameters and Nitrogen Use Efficiency of Spring Maize in the Middle Reaches of Yangtze River[J].Acta Agron Sin, 2014, 40(06): 1081-1092.

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Effects of Nitrogen Application and Film Mulching on Yield Performance Parameters and Nitrogen Use Efficiency of Spring Maize in the Middle Reaches of Yangtze River

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