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Palm, C.A., Machado, P.L.O.A., Mahmood, T., Melillo, J., Murrell, S.T., Nyamangara, J., Scholes, M., Sisworo, E., Olesen, J.E., Pender, J., Stewart, J. and Galloway, J.L. (2004) Societal Responses for Addressing Nitrogen Fertilizer needs: Balancing Food Production and Environmental Concerns. In: Mosier, A.R., Syers, J.K. and Freney, J.R., Eds., Agriculture and the Nitrogen Cycle: Assessing the Impacts of Fertilizer Use on Food Production and the Environment, SCOPE 65, Paris, 71-89.

has been cited by the following article:

• TITLE: Effects of Different Nitrogen Applications on Soil Physical, Chemical Properties and Yield in Maize (Zea mays L.)

  AUTHORS: Heng Zhong, Qiao Wang, Xinhua Zhao, Qi Du, Yue Zhao, Xiaoguang Wang, Chunji Jiang, Shuli Zhao, Minjian Cao, Haiqiu Yu, Dawei Wang

  KEYWORDS: Maize, N Fertilizer Application, Yield, Soil Physical and Chemical Properties, N Content

  JOURNAL NAME: Agricultural Sciences, Vol.5 No.14, December 19, 2014

  ABSTRACT: Application of nitrogen (N) fertilizer is one of the most important approaches on improving maize grain yield. However, as is known to all, overuse N fertilizer not only leads to decline of N use efficiency and maize yield, but also leads to potential risk to environment pollution. This experiment was conducted to determine the effects of N fertilizer applications with nine different treatments on soil physical-chemical characters and maize grain yield using hybrid variety Zhengdan 958 in 2011 and 2012. Results indicated that the soil bulk densities of T2 (CK) and T1 were the lowest compared to other treatments in 2011 and 2012, respectively, whereas the soil bulk density of T5 in 2011 and T3 in 2012 were higher than other treatments. The soil porosity and field capacity of T5 in 2011 and T3 in 2012 were lower than other treatments, but those of CK in 2011 and T1 in 2012 were higher than other treatments. The pH values of T3 to T7 were lower than other treatments. These results indicated that the soil bulk densities were increased, whereas the soil porosity, field capacity and values pH were decreased by N application at different stages. N application could increase the N contents of leaf and stem, whereas less or excess N application should not significant improve maize yield. Although the soil organic matter and total N contents of T3 were the highest in both 2011 and 2012, the yield of T4 is the highest in both 2011 and 2012. The application amount, period and times of N fertilizer were important to maize yield.