Effect of Fertilizing Level and Planting Densities on Yield and Nitrogen Utilization in Maize

• Published in: Hunan agricultural science & technology newsletter : HASTN Vol. 16; no. 3; p. 504
• Main Authors: Tan, Hua, Zou, Chenglin, Zheng, Debo, Huang, Aihua, Mo, Runxiu, Wei, Xinxing, Wu, Yongsheng, Jiang, Weiping, Wei, Hui, Huang, Kaijian
• Format: Journal Article
• Language: English
• Published: Changsha Wu Chu (USA-China) Science and Culture Media Corporation 01.03.2015
• Subjects: Agricultural production; Corn; Efficiency; Fertilizers; Nitrogen; Physiology
• ISSN: 1009-4229

Elite maize hybrid Guidan0810 was selected as material, and the effects of fertilizing level and planting densities on yield and nitrogen utilization were discussed in the study. In field experiments as per double-cropping system, 4 main plots (fertilization levels) and 6 subplots (planting densities) were set in a split plot design. The results suggested that yield had close relationship with fertilization levels and planting densities. Different fertilization levels and planting densities significantly affected yield. With the increase of nitrogen fertilization, nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen physiological efficiency declined. Under the same fertilization level, nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen physiological efficiency grew a little with the increase of planting density, so nitrogen efficiency could be improved by regulating planting density. The results also showed that A2 (including N 225.0 kg/hm^sup 2^, P^sub 2^O^sub 5^ 75.0 kg/hm^sup 2^, K^sub 2^O 187.5 kg/hm^sup 2^) matching to B3 (52 500 plants/hm^sup 2^) or B4(60 000 plants/hm^sup 2^) was a better design, which could obtain a higher yield in the range of 7 913.2-8 207.8 kg/hm^sup 2^, respectively.