| This article has been：Browse 2167Times Download 2009Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2019018 |
|
| Nitrogen Applications Affect Water Consumption and Yield of Maize Grown in Double-furrowed Raised Bed with Full Film Mulch |
|
ZHAI Dengpan, JIANG Jing* , BAI Yulong, ZHANG Yi, ZHANG Chaobo
|
|
College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
|
| Abstract: |
| 【Objective】 Raised bed with its surface mulched is an efficient cultivation to improve water use efficiency in arid and semi-arid regions. This paper aims to investigate how nitrogen applications affect yield and water consumption of spring maize grown in double-furrowed raised bed with full film mulching.【Method】Cultivar of Zhongdi 88 was used as the model plant and four nitrogen applications were compared: no application (N0), 225 kg/hm2 (N1), 275 kg/hm2 (N2) and 325 kg/hm2 (N3). The experiment was conducted in randomized blocks and in each treatment, we measured soil water content, plant height, leaf area, yield and yield components of the maize at different growing stages. We also calculated its overall water consumption and nitrogen use efficiency.【Result】 Water consumption in the four treatments was in the order of N3>N2>N1>N0, with their associated value being 524.7, 520.9, 496.6 and 456.7 mm respectively. Plant height and leaf area index at all growth stages increased with nitrogen application. Nitrogen application significantly (p<0.05) increased ear length, kernel number, 100-grain weight, biomass yield, grain yield and water use efficiency. There were significant differences between N1 and other two nitrogen applications (p<0.05), although the difference between N2 and N3 was insignificant. The partial productivity of the nitrogen application was in the order of N1>N2>N3. Compared with N2, the agronomic utilization efficiency of the nitrogen in N1 and N3 reduced significantly by 34.3 and 12.0% respectively (p<0.05). 【Conclusion】In terms of yield, water and nitrogen use efficiency, applying nitrogen at 275 kg/hm2 is optimal for maize grown in double-furrowed raised bed with full film mulching. |
| Key words: Full-film mulching; double-furrowed raised bed; nitrogen application; water consumption; maize yield; water and nitrogen use efficiency |
|
|
