Active crop sensor to detect variability of nitrogen supply and biomass on sugarcane fields


Autoria(s): Portz, G.; Molin, J. P.; Jasper, J.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

23/10/2013

23/10/2013

2012

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

http://dx.doi.org/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