Potential of Controlled Irrigation and Drainage for Reducing Nitrogen Emission from Rice Paddies in Southern China

The effect of controlled irrigation and drainage (CID) at different growth stages of rice on nitrogen (N) from rice paddy was studied. Submergence at different stages was imposed in specially designed experimental tanks in 2009 and 2010 based on alternate wetting and drying technology (AWD, the control, CK). Treatments include CID treatment at tiller stage (T1), jointing-booting stage (T2), panicle initiation stage (T3), and milky stage (T4). Results showed that fertilization could significantly increase the concentration of -N and TN in surface water but had a little influence on -N. The concentrations of -N and -N in surface water increased at first and then decreased after fertilization, while the concentrations of -N and TN in groundwater kept on being relatively stable. Compared to CK, CID significantly increased the concentration of -N in surface water at four stages. However, it reduced the concentration of -N. Consistent with the reduction of drainage, CID at four stages could significantly decrease the amount of -N and -N losses by runoff in relation to CK.

• Publication year

  2015

• Venue

  Journal of Chemistry

• Publication date

  2015-08-11

• Fields of study

  Agricultural and Food Sciences, Chemistry

• Identifiers
  DOI 10.1155/2015/913470
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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