Active crop sensor to detect variability of nitrogen supply and biomass on sugarcane fields
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
23/10/2013
23/10/2013
2012
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Resumo |
Nitrogen management has been intensively studied on several crops and recently associated with variable rate on-the-go application based on crop sensors. Such studies are scarce for sugarcane and as a biofuel crop the energy input matters, seeking high positive energy balance production and low carbon emission on the whole production system. This article presents the procedure and shows the first results obtained using a nitrogen and biomass sensor (N-Sensor (TM) ALS, Yara International ASA) to indicate the nitrogen application demands of commercial sugarcane fields. Eight commercial fields from one sugar mill in the state of Sao Paulo, Brazil, varying from 15 to 25 ha in size, were monitored. Conditions varied from sandy to heavy soils and the previous harvesting occurred in May and October 2009, including first, second, and third ratoon stages. Each field was scanned with the sensor three times during the season (at 0.2, 0.4, and 0.6 m stem height), followed by tissue sampling for biomass and nitrogen uptake at ten spots inside the area, guided by the different values shown by the sensor. The results showed a high correlation between sensor values and sugarcane biomass and nitrogen uptake, thereby supporting the potential use of this technology to develop algorithms to manage variable rate application of nitrogen for sugarcane. Maquinas Agricolas Jacto SA Maquinas Agricolas Jacto SA Brazilian Government (CNPq-National Council of Scientific and Technological Development) Brazilian Government (CNPqNational Council of Scientific and Technological Development) |
Identificador |
PRECISION AGRICULTURE, DORDRECHT, v. 13, n. 1, Special Issue, supl. 1, Part 6, pp. 33-44, FEB, 2012 1385-2256 http://www.producao.usp.br/handle/BDPI/35723 10.1007/s11119-011-9243-4 |
Idioma(s) |
eng |
Publicador |
SPRINGER DORDRECHT |
Relação |
PRECISION AGRICULTURE |
Direitos |
closedAccess Copyright SPRINGER |
Palavras-Chave | #NITROGEN MANAGEMENT #OPTICAL SENSING #REFLECTANCE #YARA N-SENSOR #FERTILIZATION #SYSTEM #YIELD #CANE #AGRICULTURE, MULTIDISCIPLINARY |
Tipo |
article original article publishedVersion |