Nitrogen mineralization rates in ten surface soils amended with (200？μg N g？1 soil) or without broiler litter were investigated. The soil-broiler litter mixture was incubated at for 28 weeks. A nonlinear regression approach for N mineralization was used to estimate the readily mineralizable organic N pools ( ) and the first-order rate constant (k). The cumulative N mineralized in the nonamended soils did not exceed 80？mg N kg？1 soil. However, in Decatur soil amended with broiler litter 2, it exceeded 320？mg N kg？1 soil. The greatest calculated of the native soils was observed in Sucarnoochee soil alone (123？mg kg？1 soil) which when amended with broiler litter 1 reached 596？mg N kg？1 soil. The added broiler litter mineralized initially at a fast rate (k1) followed by a slow rate (k2) of the most resistant fraction. Half-life of organic N remaining in the soils alone varied from 33 to 75 weeks and from 43 to 15 weeks in the amended soils. When was regressed against soil organic N ( ) and C ( ), positive linear relationships were obtained. The pools increased with sand but decreased with silt and clay contents. 1. Introduction In general, nitrogen (N) is said to be the most difficult nutrient to manage in agriculture because of challenges in estimating the amount of N available for plant uptake and synchronizing N release from sources to meet a specific crop demand [1]. Even though the Earth’s atmosphere contains 78% N in the form of dinitrogen (N2) gas, most of this N is unavailable for plant uptake [2] with the exception of leguminous plants which can fix N. In the plant root zone, N is present in organic forms, including plant and microbial protein and amino acids, all together forming soil organic matter [3] from which the N is slowly converted into plant-available forms. During mineralization, organic N is converted into plant-useable inorganic forms ( –N and, –N) that are released into soil and subjected to various fates. For farmers in general and organic farmers in particular, N mineralization is an important process to understand because several environmental conditions govern this process [3]. Presently, there is an array of commercial inorganic N fertilizers available; however, their costs are prohibitory and out of range for many limited resource farmers. Thus, a careful management of organic N sources is one of the most important priorities for farmers; this in turn will limit unfavorable N losses into the environment. Because of the rapid growth of the organic farming segment of the United States agriculture, there is a high demand for
References
[1]
P. A. Moore, T. C. Daniel, D. R. Edwards, and D. M. Miller, “Effect of chemical amendments on ammonia volatilization from poultry litter,” Journal of Environmental Quality, vol. 24, no. 2, pp. 293–300, 1995.
[2]
J. A. Delgado, Potential Use of Innovative Nutrient Management Alternatives to Increase Nutrient Use Efficiency, Reduce Losses, and Protect Soil and Water Quality, Special Issue of the Journal of Communications in Soil Science and Plant Analysis, Marcel Dekker, New York, NY, USA, 2001.
[3]
J. Deenik, Nitrogen Mineralization Potential in Important Agricultural Soils of Hawaii, Soil and Crop Management, Cooperative Extension Service, 2006.
[4]
Nutrition Business Journal, Organic Trade Association (OTA), Greenfield, Mass, USA, 2006, http://www.ers.usda.gov/publications/eib55/eib55ref.pdf.
[5]
United States Department of Agriculture: Economic Research Services, 2009, http://www.nal.usda.gov/Briefing/Organic/Questions/farmersmarkets.htm/.
[6]
K. P. Paudel and C. S. McIntosh, “Country report: Broiler industry and broiler litter-related problems in the southeastern United States,” Waste Management, vol. 25, no. 10, pp. 1083–1088, 2005.
[7]
National Agricultural Statistics Service, Poultry-Production and Value 2007. Summary, United States Department of Agriculture National Agricultural Statistics Service, 2008.
[8]
J. S. Robinson and A. N. Sharpley, “Water quality: release of nitrogen and phosphorus from poultry litter,” Journal of Environmental Quality, vol. 24, no. 1, pp. 62–67, 1995.
[9]
United States Department of Agriculture: National Agriculture Statistic Service, 2010, http://www.nass.usda.gov/Charts_and_Maps/Poultry/brlmap.asp.
[10]
K. Kpomblekou-A, “Relative proportion of inorganic and total nitrogen in broiler litter as determined by various methods,” Journal of the Science of Food and Agriculture, vol. 86, no. 14, pp. 2354–2362, 2006.
[11]
H. O. Liechty, M. A. Blazier, J. P. Wight, L. A. Gaston, J. D. Richardson, and R. L. Ficklin, “Assessment of repeated application of poultry litter on phosphorus and nitrogen dynamics in loblolly pine: implications for water quality,” Forest Ecology and Management, vol. 258, no. 10, pp. 2294–2303, 2009.
[12]
K. Kpomblekou-A, R. O. Ankumah, and H. A. Ajwa, “Trace and nontrace element contents of broiler litter,” Communications in Soil Science and Plant Analysis, vol. 33, no. 11-12, pp. 1799–1811, 2002.
[13]
C. C. Bitzer and J. T. Sims, “Estimating the availability of nitrogen in poultry manure through laboratory and field studies,” Journal of Environmental Quality, vol. 17, no. 1, pp. 47–54, 1988.
[14]
P. de Willigen, “Nitrogen turnover in the soil-crop system; comparison of fourteen simulation models,” Fertilizer Research, vol. 27, no. 2-3, pp. 141–149, 1991.
[15]
W. J. Wang, C. J. Smith, and D. Chen, “Predicting soil nitrogen mineralization dynamics with a modified double exponential model,” Soil Science Society of America Journal, vol. 68, no. 4, pp. 1256–1265, 2004.
[16]
N. G. Juma, E. A. Paul, and B. Mary, “Kinetic analysis of net nitrogen mineralization in soil.,” Soil Science Society of America Journal, vol. 48, no. 4, pp. 753–757, 1984.
[17]
F. E. Broadbent, “Empirical modeling of soil nitrogen mineralization.,” Soil Science, vol. 141, no. 3, pp. 208–213, 1986.
[18]
B. H. Ellert and J. R. Bettany, “Comparison of kinetic models for describing net sulfur and nitrogen mineralization,” Soil Science Society of America Journal, vol. 52, no. 6, pp. 1692–1702, 1988.
[19]
G. Stanford and S. J. Smith, “Nitrogen mineralization potentials of soils,” Soil Science Society of America Journal, vol. 109, pp. 190–196, 1972.
[20]
J. A. E. Molina, C. E. Clapp, and W. E. Larson, “Potentially mineraizable nitrogen in soil: the simple exponential model does not apply to the first 12 weeks of incubation,” Soil Science Society of America Journal, vol. 44, pp. 442–443, 1980.
[21]
L. J. Mebius, “A rapid method for the determination of organic carbon in soil,” Analytica Chimica Acta, vol. 22, no. C, pp. 120–124, 1960.
[22]
J. M. Bremmer and C. S. Mulvaney, “Nitrogen-total,” in Agronomy, A. L. Page, H. R. Miller, and D. R. Keeney, Eds., vol. 9, part 2, pp. 595–624, American Society of Agronomy, Madison, Wis, USA, 2nd edition, 1982.
[23]
D. R. Keeny and D. W. Nelson, “Nitrogen-Inorganic forms,” in Agronomy, A. L. Page, R. H. Miller, and R. D. Keeney, Eds., vol. 9, part 2, pp. 642–698, American Society of Agronomy, Madison, Wis, USA, 2nd edition, 1982.
[24]
V. J. Kilmer and J. T. Alexander, “Method of making mechanical analysis of soils,” Soil Science Society of America Journal, vol. 48, pp. 753–757, 1949.
[25]
A. Sissoko and K. Kpomblekou-A, “Carbon decomposition in broiler litter-amended soils,” Soil Biology and Biochemistry, vol. 42, no. 4, pp. 543–550, 2010.
[26]
J. L. Smith, R. R. Schobel, B. L. McNeal, and G. S. Campbell, “Potential errors in the first-order model for estimating soil nitrogen mineralization potentials,” Soil Science Society of America Journal, vol. 44, pp. 996–1000, 1980.
[27]
A. J. Barr, J. H. Goodnight, J. P. Sall, and J. I. Helwig, A User’s Guide to SAS, SAS Institute, Raleigh, NC, USA, 1976.
[28]
C. M. Gilmour, F. E. Broadbent, and S. M. Beck, “Recycling of carbon and nitrogen through land disposal of various wastes,” in Soils for Management of Organic Wastes and Waste Waters, L. E. Elliot and F. J. Stevenson, Eds., Soil Science Society of America, 1977.
[29]
SAS Institute, SAS User’s Guide, SAS Institute, New York, NY, USA, 1990.
[30]
D. W. Marquardt, “An algorithm for least squares estimation of non-linear parameters,” Journal of Society of Applied Mathematic, vol. 45, pp. 431–441, 1963.
[31]
F. J. Stevenson, “Origin and distribution of nitrogen in soil,” in Nitrogen in Agricultural Soils, F. J. Stevenson, Ed., pp. 1–42, Agronomy Society of America, Madison, Wis, USA, 1982.
[32]
M. S. Coyne, Soil Microbiology: An Exploratory Approach, Delmar, New York, NY, USA, 1999.
[33]
L. N. Nakhone and M. A. Tabatabai, “Nitrogen mineralization of leguminous crops in soils,” Journal of Plant Nutrition and Soil Science, vol. 171, no. 2, pp. 231–241, 2008.
[34]
G. M. Marion, J. Kummerow, and P. C. Miller, “Predicting nitrogen mineralization in chaparral soils,” Soil Science Society of America Journal, vol. 45, pp. 956–961, 1981.
[35]
I. J. Manguiat, I. Watanabe, G. B. Mascari？a, and J. G. Tallada, “Nitrogen mineralization in tropical wetland rice soils: I. Relationship with temperature and soil properties,” Soil Science and Plant Nutrition, vol. 42, no. 2, pp. 229–238, 1996.
[36]
V. Z. Antonopoulos, “Comparison of different models to simulate soil temperature and moisture effects on nitrogen mineralization in the soil,” Journal of Plant Nutrition and Soil Science, vol. 162, no. 6, pp. 667–675, 1999.
[37]
K. R. Sistani, A. Adeli, S. L. McGowen, H. Tewolde, and G. E. Brink, “Laboratory and field evaluation of broiler litter nitrogen mineralization,” Bioresource Technology, vol. 99, no. 7, pp. 2603–2611, 2008.
[38]
K. H. Nahm, “Factors influencing nitrogen mineralization during poultry litter composting and calculations for available nitrogen,” World's Poultry Science Journal, vol. 61, no. 2, pp. 238–255, 2005.
[39]
P. Sorensen, E. S. Jensen, and N. E. Nielsen, “The fate of 15N-labelled organic nitrogen in sheep manure applied to soils of different texture under field conditions,” Plant and Soil, vol. 162, no. 1, pp. 39–47, 1994.
[40]
C. W. Honeycutt, T. S. Griffin, and Z. He, “Manure nitrogen availability: dairy manure in northeast and central U.S. soils,” Biological Agriculture and Horticulture, vol. 23, no. 2, pp. 199–214, 2005.
[41]
R. M. Gordillo and M. L. Cabrera, “Mineralizable nitrogen in broiler litter: II. Effect of selected soil characteristics,” Journal of Environmental Quality, vol. 26, no. 6, pp. 1679–1686, 1997.
[42]
M. D. Serna and F. Pomares, “Comparison of biological and chemical methods to predict nitrogen mineralization in animal wastes,” Biology and Fertility of Soils, vol. 12, no. 2, pp. 89–94, 1991.
[43]
J. Z. Castellanos and P. F. Pratt, “Mineralization of manures nitrogen correlation with laboratory indexes,” Soil Science Society of America Journal, vol. 45, pp. 354–357, 1981.
