About Us | Help Videos | Contact Us | Subscriptions
 

Agronomy Journal Abstract - WHEAT

Effects of Elevated Ammonia Concentration and Nitrogen Status on the Growth and Yield of Winter Wheat

 

This article in AJ

  1. Vol. 102 No. 4, p. 1194-1200
     
    Received: Feb 4, 2010


    * Corresponding author(s): sqli@ms.iswc.ac.cn
 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2134/agronj2010.0053
  1. Xiaoli Chena,
  2. Xiaolong Renb,
  3. Pute Wuc,
  4. Xining Zhaoc,
  5. Jing Lid and
  6. Shiqing Li *e
  1. a National Engineering Research Center for Water-Saving and Irrigation at Yangling, Institute of Soil Erosion and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A&F University, Yangling, Shaanxi 712100, China
    b Research Center of Dryland Farming in Arid and Semiarid Areas, Northwest A&F University, Yangling, Shaanxi, China
    c National Engineering Research Center for Water-Saving and Irrigation at Yangling, Institute of Soil Erosion and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A&F University, Yangling, Shaanxi 712100, China
    d College of Resources and Environment Sciences, Northwest A&F University, Yangling, Shaanxi 712100
    e State Key Laboratory of Soil Erosion and Dryland Farming, Institute of Soil Erosion and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A&F University, Yangling, Shaanxi 712100, China. X. Chen and X. Ren contributed equally to this work

Abstract

Elevated atmospheric NH3 may affect productivity of crops in part by altering N assimilation, and the effect may be responsible for the N status of the plant. To investigate this possibility, measurements of plant height, leaf area per plant, net photosynthesis rate (Pn ), plant biomass production, shoot/root (S/R) ratio, grain yield and its components were used to examine the effects of elevated NH3 concentration in combination with N status on growth and yield in pot-grown winter wheat (Triticum aestivum L.) using open-top chambers. After 2 month of NH3 injection, elevated NH3 significantly increased plant height, leaf area per plant, shoot biomass production (total biomass), and S/R ratio in the N-deprived plants in both years, but the corresponding values in the N-sufficient plants were reduced. The Pn values were increased with NH3 enhancement both in the presence and absence of N in the potting soil in each experimental year, but the increment of Pn in N-deprived plants was two times higher than that of the N-sufficient plants in both years. At harvest, grain yields of N-deprived winter wheat exposed to elevated levels of NH3 were increased by 21% and 23% than that of N-deprived winter wheat exposed to 0 levels of NH3, while grain yields of N-sufficient winter wheat exposed to elevated levels of NH3 were decreased by 27% and 23% than that of N-sufficient winter wheat exposed to 0 levels of NH3 in 2007 and 2008, respectively.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2010. American Society of AgronomyCopyright © 2010 by the American Society of Agronomy