Journal
CROP SCIENCE
Volume 56, Issue 3, Pages 1234-1244Publisher
WILEY
DOI: 10.2135/cropsci2015.06.0349
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Funding
- Sao Paulo Research Foundation (FAPESP) [2009/04691-2, 2009/12537-3, 2009/10192-9]
- National Council for Scientific and Technological Development (CNPq) [574982/2008-6]
- Yara International ASA (FEALQ) [4925-5]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/12537-3] Funding Source: FAPESP
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Knowing the right fertilizer N source is a key management practice for improving nutrient use and productivity for sugarcane (Saccharum spp.). Therefore, this study evaluated the effect of fertilizer N sources on aboveground biomass (BM) and nutrient (N, P, K, Ca, Mg, and S) content for sugarcane ratoon. Two field trials under highly weathered tropical soils (Site 1, Typic Hapludox; Site 2, Typic Eutrustox) were conducted in the southeast region of Brazil. Five fertilizer N sources (organomineral fertilizer [OMF], ammonium chloride [AC], ammonium nitrate [AN], calcium ammonium nitrate [CAN], and urea) were applied on sugarcane at a rate of 100 kg N ha(-1). A control treatment was also included in the randomized complete block design. At harvest, total BM varied from 24.4 Mg ha(-1) (control and AC) at Site 1 to 44.2 Mg ha(-1) (CAN) at Site 2, total K content varied from 185 kg ha(-1) (AC) at Site 2 to 747 kg ha(-1) (OMF) at Site 1, and total N content ranged from 92 kg ha(-1) (AC) at Site 2 to 165 kg ha(-1) (AN) at Site 1. Use of CAN and OMF resulted in comparable or superior BM and nutrient content relative to the other N fertilizers. In contrast, AC did not increase BM and nutrient content (except for N and Mg at Site 1), but also decreased by 33% total N content than control at Site 2. Use of more efficient fertilizer N sources (e.g., CAN and OMF) could increase productivity and nutrient use for sugarcane ratoon systems.
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