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Dourado-Neto, D., Powlson, D., Bakar, R.A., Bacchi, O.O.S., Cong, P.T., Keerthisinghe, G., Ismaili, M., Rahman, S.M., Reichardt, K., Safwat, M.S.A., Sangakkara, R., Timm, L.C., Wang, J.Y., Zagal, E. and Kessel, C. (2010) Multiseason Recoveries of Organic and Inorganic Nitrogen-15 in Tropical Cropping Systems. Soil Science Society of America Journal, 74, 139-152.
http://dx.doi.org/10.2136/sssaj2009.0192

has been cited by the following article:

• TITLE: Evaluating Nitrogen Behavior in Sugarcane after Fertilization Using Leaf and Sap Extract Analyzes

  AUTHORS: Helio A. W. Joris, Thais R. Souza, Zaqueu F. Montezano, Vitor P. Vargas, Heitor Cantarella

  KEYWORDS: Saccharum spp., Mineral Nitrogen, Nitrogen Absorption, Ratoon Cane, Nutritional Status

  JOURNAL NAME: American Journal of Plant Sciences, Vol.5 No.18, August 12, 2014

  ABSTRACT: Nitrogen (N) fertilization is important for sugarcane crops, for both agronomic and environmental reasons. Better use of N from fertilizer is required for crop management, and in order to achieve it, adequate N nutrition monitoring is necessary. Sap extract analysis is a sensitive technique that has been adopted in other crops to tackle this objective, and can be used for sugarcane. The aim of this study was to evaluate the behavior of N and the response of sugarcane after N fertilization, using sap and leaf tissue analysis. The study was undertaken in two experimental areas in 2012/2013 season, using ratoon cane, following application of 0, 50, 100, and 150 kg·ha-1 of N. The youngest visible leaves were sampled from sugarcane at five time points between 0 and 150 days after fertilization, to evaluate the nitrate, ammonium, and total N content of sap extract, and total N content of leaf tissue. At the first sampling point (30 days after N fertilizer application), mineral N in sap increased as a result of N fertilization in medium-textured soil, and remained high until 120 days after fertilization in clayey soil. The total N content of sap followed a similar behavior. Stalk yield was only observed to increase in sugarcane grown in the clayey soil. Sap analysis proved to be an efficient method for monitoring N status in sugarcane grown in different soil types.