Grain Yield and Nitrogen Use Characteristics of High-yield Maize Cultivars under Different Density and Nitrogen Regimes

doi:10.7668/hbnxb.2017.03.030

Abstract

Abstract: Excessive nitrogen (N) fertilizer application and planting density,outdated fertilization techniques,and non-optimal planting patterns are current cultivation problems with summer maize among smallholders in North China. The objective of this study was to study the effects of planting density and N fertilizer on yield,nitrogen use characteristics and protein yield of summer maize cultivars in North China. Under field experiment,using two high-yield maize cultivars,ZD 958 and XY 335. Planting density were 6.75×10⁴ and 8.25×10⁴ plants per hectare,and four nitrogen application rates were arranged with 0,180,240,300 kg/ha. The results showed that under the same planting density,with the increase of N application rate,grain yield,N accumulation and protein yield were overall showed a trend of increase in two maize cultivars,while N use efficiency were decreased. Under the same N level,with the increase of planting density,grain yield,N accumulation and protein yield were overall showed a trend of increase in two maize cultivars,while N use efficiency was decreased. Under different planting density and N fertilizer rate,grain yield,N accumulation,protein yield and N use efficiency of XY 335 was higher than that of ZD 958. These results indicated that planting density was 8.25×10⁴per plants hectare,N application rate was 240 kg/ha,two maize varieties had higher grain yield,N efficiency and protein yield,to obtain coordination of high yield,protein yield and N use efficiency.

Key words: Maize cultivars, Planting density, Nitrogen fertilizer, Nitrogen accumulation, Grain yield, Nitrogen use efficiency

CLC Number:

S143.1

ZANG Hecang, WANG Yanjing, ZHANG Jie, FENG Xiao, HU Feng, ZHAO Qing, LI Guoqiang, ZHENG Guoqing. Grain Yield and Nitrogen Use Characteristics of High-yield Maize Cultivars under Different Density and Nitrogen Regimes[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2017, 32(3): 196-200. doi: 10.7668/hbnxb.2017.03.030.

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http://www.hbnxb.net/EN/Y2017/V32/I3/196

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