| Effect of drip irrigation and fertilization on grain yield and nitrogen utilization of maize |
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| DOI：10.7606/j.issn.1000-7601.2015.03.03 |
| Key Words: maize drip irrigation under film integration of irrigation and fertilization yield kernel protein content nitrogen utilization |
| Author Name | Affiliation | | TAN Hua | 广西农业科学院玉米研究所, 广西 南宁 530007 | | ZHENG De-bo | 广西农业科学院玉米研究所, 广西 南宁 530007 | | ZOU Cheng-lin | 广西农业科学院玉米研究所, 广西 南宁 530007 | | WEI Xin-xing | 广西农业科学院玉米研究所, 广西 南宁 530007 | | HUANG Ai-hua | 广西农业科学院玉米研究所, 广西 南宁 530007 | | WU Yong-sheng | 广西农业科学院玉米研究所, 广西 南宁 530007 | | JIANG Wei-ping | 广西农业科学院玉米研究所, 广西 南宁 530007 | | WEI hui | 广西农业科学院玉米研究所, 广西 南宁 530007 | | MO Run-xiu | 广西农业科学院玉米研究所, 广西 南宁 530007 | | HUANG Kai-jian | 广西农业科学院玉米研究所, 广西 南宁 530007 |
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| Abstract: |
| Field experiments were conducted to evaluate the effect of drip irrigation and fertilization on yield and nitrogen utilization of a maize hybrid Guidan 688 with a split plot design of four irrigation treatments (A1,A2,A3, and A4) and four fertilizer levels (B1,B2,B3, and B4). The results showed that maize yield ranged from 7 682.2 kg·hm-2 (A4, 1 237.5 m3·hm-2) to 8 640.7 kg·hm-2(A1, 2 250 m3·hm-2). The combination of A1 and B2 (191.25 kg N·hm-2, 76.5 kg P2O5·hm-2, 153.0 kg K2O·hm-2) obtained the highest yield (9 016.9 kg·hm-2). Protein content of maize kernel ranged from 9.01% to 9.92% across the four nitrogen treatments, with an order of B1＞B2＞B3＞B4 under the same irrigation amount. Nitrogen use efficiency, nitrogen agronomy efficiency and nitrogen physiological efficiency increased as the irrigation amount increased, while decreased as the fertilizer rate increased. In addition, plant density showed beneficial effect on nitrogen use. In summary, right combination of irrigation and fertilizer could improve water and nutrient use efficiency and grain yield as well. |
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