13,00 CHEMICAL RIPENER AND BORON INCREASE THE …...CHEMICAL RIPENER AND BORON INCREASE THE SUCROSE...
Transcript of 13,00 CHEMICAL RIPENER AND BORON INCREASE THE …...CHEMICAL RIPENER AND BORON INCREASE THE SUCROSE...
CHEMICAL RIPENER AND BORON INCREASE
THE SUCROSE ACCUMULATION OF SUGARCANE
IN EARLY SEASON
The experiments were conducted on ratoon cane in early harvest in two consecutive years and two
locations with different soil types and production environments, a total of four experiments
(2008/2009 at Olimpia, SP, Brazil and 2009/2010 at Igaraçu do Tiete, SP, Brazil.
The treatments consisted in the application of Trinexapac-ethyl, Trinexapac-ethyl + Boron, Boron
and control (natural ripening), applied at the dose recommended by the manufacturers, i.e., 0.8 L ha-
1, 0.8 L ha-1 + 0.18 Kg ha-1, and 0.18 Kg ha-1, respectively, with the addition of 5% adjuvants.
Each plot consisted of 6 rows (10 m long), spaced at 1.5 m. However, for evaluation purposes, only
the central 4 rows were considered, disregarding 1 m at the extremities, made at 0, 15, 30, 45 and 60
days after application (DAA).
Variety RB855453 was used, known for its medium stalk yield, high sucrose content and early
maturation, and medium soil fertility requirements.
The application of Boron, Trinexapac-ethyl + Boron and Trinexapac-ethyl,
anticipated harvest in 18, 16 and 15 days, respectively, comparing with the
control.
Boron, Trinexapac-ethyl + Boron and Trinexapac-ethyl treatments provided on
average of 7% higher sucrose accumulation than control at 50 DAA
(harvesting recommendation by manufacturer).
The application of Trynexapac-ethyl, in association with Boron or not,
improves the technological quality of sugarcane.
CONCLUSIONS
RESULTS
MATERIALS AND METHODS
The sugar industry can be directly affected by the ripening process and continuous supply of high
quality raw material depends on the use of tools to optimize the production system, such as ripeners
and micronutrients.
Boron deficiency can affect the growth and development of plants, mostly due to its structural
function in cell wall composition, but also to be involved in other functions such as protein synthesis
and metabolism of carbohydrates.
The aim of this study was to evaluate the effect of boron on sugarcane in areas with restricted
availability of the element at the same time of application of the ripener Trinexapac-ethyl.
INTRODUCTION
Gabriela Ferraz de Siqueira, Rodrigo Foltran, Deise Paula da Silva and Carlos Alexandre Costa Crusciol Crop Science Department, College of Agricultural Sciences, São Paulo State University (Unesp)
1780 Jose Barbosa de Barros Street, P.O.Box 237, Zip Code 18610-307, Botucatu-SP, Brazil. E-mail: [email protected]
Funding Agency:
Precipitation (mm month-1), maximum, medium, and minimum temperatures
(°C), recorded at experimental areas during the period in which the
experiment was conducted.
y = 0,059x + 11,113 R² = 0,99**
y = -0,0016x2 + 0,1584x + 11,148 R² = 0,99**
y = -0,001x2 + 0,1324x + 11,029 R² = 0,99**
y = -0,0013x2 + 0,1461x + 10,96 R² = 0,99**10,00
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0 10 20 30 40 50 60
Po
l can
e (
%)
Days after application
Minimum Pol cane
Control
Boron
Trinexapac-ethyl
Trinexapac-ethyl + Boron
Pol cane (%), with the application of Trynexapac-ethyl, associated or not with Boron, in early
season. Average of 2 locals and 2 years. ** significant at 5% probability by the LSD test.
Purity cane (%) and Reducing sugar (RS) (%), with the application of Trynexapac-
ethyl, associated or not with Boron, in early season. Average of 2 locals and 2 years. **
significant at 5% probability by the LSD test.