[Effects of controlled-release fertilizers on summer maize grain yield, field ammonia volatilization, and fertilizer nitrogen use efficiency]

Ying Yong Sheng Tai Xue Bao. 2009 Nov;20(11):2678-84.
[Article in Chinese]

Abstract

A field experiment with colophony-coated fertilizer (CRF) and sulfur-coated fertilizer (SCF) showed that under the same application rates of N, P and K, applying CRF and SCF increased the summer maize grain yield by 13.15% and 14.15%, respectively, compared to the application of common compound fertilizer CCF. When the applied amount of CRF and SCF was decreased by 25%, the yield increment was 9.69% and 10.04%, respectively; and when the applied amount of CRF and SCF was decreased by 50%, the yield had less difference with that under CCF application. The field ammonia volatilization rate in treatments CRF and SCF increased slowly, with a peak appeared 7 days later than that in treatment CCF, and the total amount of ammonia volatilization in treatments CRF and SCF was ranged from 0.78 kg N x hm(-2) to 4.43 kg N x hm(-2), with a decrement of 51.34%-91.34% compared to that in treatment CCF. The fertilizer nitrogen use efficiency and agronomic nitrogen use efficiency of CRF and SCF were also significantly higher than those of CCF.

Publication types

  • English Abstract
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Agriculture / methods
  • Ammonia / analysis*
  • Biomass*
  • China
  • Fertilizers*
  • Nitrogen / analysis*
  • Seasons
  • Volatilization
  • Zea mays / growth & development*

Substances

  • Fertilizers
  • Ammonia
  • Nitrogen