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Fertilizer research

, Volume 31, Issue 2, pp 209–214 | Cite as

Guano as a nitrogen source for fertigation in organic farming

  • A. Hadas
  • R. Rosenberg
Article

Abstract

Guano is a natural organic fertilizer used in organic farming management when supplementary nitrogen is needed. In modern irrigated agriculture N top dressing is often applied through the irrigation water. The objective of this research was to evaluate the potential of guano as a source of available N when applied through water, compared with application to soil. The release of mineral and total soluble N from guano to water was monitored, as a function of time, under laboratory conditions, and compared with mineralization of guano in soils. The effect of guano:water ratio, aeration of the mixtures, addition of rock-phosphate or clay minerals, and temperature on the composition of the solutions was determined. Guano released more than 90% of its N content into solution during 10 d at a guano:water ratio of 1:10 at 27°C. The release of soluble N, of which 85% was NH4-N, was linked with an increase of pH from 7.0 to 8.5 or more. None of the treatments increased the rate or the total N release beyond that. Suboptimal temperatures, 13.6 ± 4.7°C or 50°C, greatly reduced the rate of guano-N release to solution. The mineralization of guano in soil was more rapid than in water, but the total N release was the same, leading to the conclusion that the application of guano through the irrigation water may be as efficient as directly to soil, provided sufficient time for fermentation is allowed.

Key words

Guano organic fertilizers N fertilizers organic farming N mineralization CO2 evolution fertigation 

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References

  1. 1.
    Anderson JPE (1982) Soil respiration. In: Page AL et al (eds) Methods of Soil Analysis, Agronomy 9, Part 2, 2nd edn, pp 831–871. Madison, WI: American Society of AgronomyGoogle Scholar
  2. 2.
    Cooke GW (1972) Fertilizing for Maximum Yield. Chapter 2, pp. 13–27. London; Crosby Lockwood & Son LtdGoogle Scholar
  3. 3.
    Dewes T (1988) Chemical and microbial changes during the fermentation of liquid cattle manure treated with AGRIBEN and its ingredients. In: Agricultural Waste Management and Environment Protection. Proceedings of the 4th International CIEC Symposium (Braunschweig, FRG) Vol 1, pp 323–329. Gottingen, Germany. International Scientific Center of Fertilizers (CIEC)Google Scholar
  4. 4.
    Doran JW, Fraser DG, Culik MN and Liebhardt WC (1987) Influence of alternative and conventional agricultural management on soil microbial processes and nitrogen availability. Am J Alternative Agric 2: 99–106Google Scholar
  5. 5.
    Hadas A, Bar-Yosef B, Davidov S and Softer M (1983) Effect of pelleting, temperature and soil type on mineral nitrogen release from poultry and dairy manures. Soil Sci Soc Am J 47: 1129–1133Google Scholar
  6. 6.
    Levi M and Nitzani J (1986) [Compost]. Israel: Ministry of Agriculture, Extension Service, Dept of Garden Crops Bull pp 13 (in Hebrew)Google Scholar
  7. 7.
    Liebhardt WC, Andrews RW, Culik MN, Harwood RR, Janke RR, Radke JK and Rieger-Schwartz SL (1989) Crop production during conversion from conventional to low-input methods. Agron J 81: 150–159Google Scholar
  8. 8.
    Lockeretz W, Shearer G and Kohl DH (1981) Organic farming in the Corn Belt. Science 211: 540–547Google Scholar
  9. 9.
    Owen O, Rogers DW and Winsor GW (1950) The nitrogen status of soils. Part I. The nitrification of some nitrogeneous fertilizers. J. Agric Sci 40: 185–190Google Scholar

Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • A. Hadas
    • 1
  • R. Rosenberg
    • 1
  1. 1.Institute of Soils and WaterA.R.O., The Volcani CenterBet DaganIsrael

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