Hostname: page-component-745bb68f8f-5r2nc Total loading time: 0 Render date: 2025-01-09T23:59:53.005Z Has data issue: false hasContentIssue false
  • English
  • Français

Nitrogen balance studies in rice using 15N-labelled urea and urea supergranules

Published online by Cambridge University Press:  27 March 2009

S. K. Mohanty ,
S. P. Chakravorti  and
A. Bhadrachalam
S. K. Mohanty
Affiliation:
Division of Soil Science and Microbiology, Central Rice Research Institute, Cuttack 753006, Orissa, India
S. P. Chakravorti
Affiliation:
Division of Soil Science and Microbiology, Central Rice Research Institute, Cuttack 753006, Orissa, India
A. Bhadrachalam
Affiliation:
Division of Soil Science and Microbiology, Central Rice Research Institute, Cuttack 753006, Orissa, India
Get access Rights & Permissions [Opens in a new window]

Extract

Recovery of applied nitrogen by the rice crop is invariably low, often 30–50% (Prasad & De Datta 1979). The poor recovery has been attributed to different types of losses occurring in the rice field. Recovery improved with split application, delayed application or deep placement (Pillai & Vamadevan 1978; Craswell & Vlek 1979), indicating that the management factor plays an important role in increasing fertilizer nitrogen efficiency. To investigate such factors, and seasonal effects, field experimentswere carried out using 15N-labelled urea (PU) and urea supergranules (USG). The recovery of fertilizer 15N by the plant and retention in the soil were studied in both dry and wet seasons.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 113 , Issue 1 , August 1989 , pp. 119 - 121
Copyright
Copyright © Cambridge University Press 1989

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Buresh, R. J., Austin, E. R. & Craswell, E. T. (1982). Analytical methods in 15N research, Fertilizer Research 33, 37–62.CrossRefGoogle Scholar
Craswell, E. T. & Vlek, P. L. G. (1979). Fate of fertilizer nitrogen applied to wetland rice. In Nitrogen and Rice, pp. 175–192. Los Bānos, Philippines: IRRI.Google Scholar
Katyal, J. C., Singh, B., Vlek, P. L. G. & Craswell, E. T. (1985). Fate and efficiency of nitrogen fertilizers applied to wetland rice. II. Punjab, India. Fertilizer Research 6, 279–290.CrossRefGoogle Scholar
Mohapatra, N. P., Tosh, B. N., Panda, D. & Mohanty, S. K. (1983). Effect of urea-based fertilizers on nitrogen transformations, yield and uptake of nitrogen by rice under flooded conditions. Oryza 20, 119–124.Google Scholar
Mohapatra, P. (1988). Effect of different nitrogen management practices on the losses of applied nitrogen in wetland rice. PhD thesis, Utkal University, Vanivihar, Orissa.Google Scholar
Pillai, K. G. & Vamadevan, V. K. (1978). Studies on integrated nutrient supply system for rice. Fertilizer News 23 (3), 11–14.Google Scholar
Prasad, R. & De Datta, S. K. (1979). Increasing fertilizer nitrogen efficiency in wetland rice. In Nitrogen and Rice, pp. 465–485. Los Baños, Philippines: IRRI.Google Scholar
Rao, N. C. (1987). Seasonal influence on growth and yield of rice varieties. Oryza 24, 59–65.Google Scholar
Vlek, P. L. G., Byrnes, B. H. & Craswell, E. T. (1980). Effect of urea placement on leaching losses of nitrogen from flooded rice soils. Plant and Soil. 54, 441–449.CrossRefGoogle Scholar
Vlek, P. L. G. & Craswell, E. T. (1979). Effect of nitrogen sources and management on ammonia volatilization losses from flooded rice soil system. Soil Science Society of America Journal 43, 352–358.CrossRefGoogle Scholar