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Sources and managements of nitrogen fertilization in cotton plants

Sources and managements of nitrogen fertilization in cotton plants

Authors :
Flávio Hiroshi Kaneko
Aguinaldo José Freitas Leal
Jefferson Luís Anselmo
Salatiér Buzetti
Fábio da Silva Tosta
Source :
Pesquisa Agropecuária Tropical, Vol 43, Iss 1, Pp 57-63 (2013)
Publication Year :
2013
Publisher :
Universidade Federal de Goiás, 2013.

Abstract

The development of new technologies that aim at increasing the efficiency of nitrogen (N) fertilizers is essential for the agricultural sustainability. Thus, this study aimed at evaluating the cotton plants response to different topdressing N sources, under no-till system, in the Brazilian Savannah, in the 2008/2009 and 2009/2010 growing seasons. Treatments consisted of three N sources (urea, urea with urease inhibitor and ammonium nitrate) and two topdressing N fertilization applications (one application at V5 and two applications, as it follows: 50% at V5 + 50% at B6), plus a control (without topdressing N). The ammonium nitrate application provided the best results for both seasons, while the urea with urease inhibitor differed from urea only in the first season. The topdressing N fertilization provided different results among crops, being dependent of environmental conditions. If there is sufficient rainfall to incorporate the N to soil, better yields can be expected, when all the topdressing fertilization takes place at the V5 stage.

Details

Language :
English, Portuguese
ISSN :
19834063
Volume :
43
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Pesquisa Agropecuária Tropical
Publication Type :
Academic Journal
Accession number :
edsdoj.2dd62385ce824514bf935e1567f21ad8
Document Type :
article
Full Text :
https://doi.org/10.1590/S1983-40632013000100002