poster - International Conference of Agricultural Engineering

and the need to reduce costs, it becomes necessary to increase knowledge about the effects
of organic mulch on the productivity of cane sugar.
This study aimed evaluate the response of cane sugar crop to
different irrigation levels and the use of organic mulch, in Vale do São Patrício in Goiás.
2. Material and Methods
An experiment was conducted in a sugarcane mechanical harvest field in Jalles
Machado S.A. Sugar Mill in Pirinópolis-GO, Brazil. The soil was a Yellow Red Latossol
(Prado, 2003), and the sugarcane crop (3 th harvest) was grown from July 1998 to May 1999.
It was evaluated the effect of soil cover with straw on yield and quality sugarcane using the
SP79-1011 cultivar with different levels of dry season irrigation (sprouting irrigation of 0, 20,
40, 60 and 80 mm. The design was randomized block with a bifactorial (5 x 2) and 3 blocks.
The climate is classified according to the climatic classification of Köppen (2011), as
tropical savannah with dry winter and rainy summer (Aw), with an annual average rainfall of
1540 mm, with a water deficit period well defined, between May and October.
The experiment was conducted between Jully 24 and 30th,1998. Starting at ten days
after harvest of second crop, with the application of irrigation at one time, and the harvest of
the experimental area was on May 28th, 1999.
The experiment was installed in a complete randomized block with 3 blocks in a
factorial design 5 x 2, quantitatively and qualitatively, respectively. Five types of irrigation
level (0, 20, 40, 60 and 80 mm) and two cropping systems (with and without organic mulch),
totaling 10 treatments. The plots consisted of 18 lines of 15 m in-row spacing of 1.30 m. The
six central rows were considered useful area of the plot to carry out evaluations.
Was performed weekly, collecting soil samples for determination of water content at
depths of 0.0-0.05 m, 0.05-0.10 m, 0.10-0.20 m, and 0.20 to 0.40 m, using the gravimetric
method, following the methodology proposed by Embrapa (1997). The weed control was
done as recommended by Procopius (2003) and was performed topdressing in order to
provide the elements nitrogen, potassium, zinc and boron as recommended by Korndörfer
(1994).
At harvest (May 28th, 1999) were counted the total number of stems of the usable
area of the plot. It was also determined the average weight per stem, collecting and weighing
six samples of 10 canes per plot. A bundle sampled (per plot) was used for weighing
technology for analysis. The productivity of the parcel was determined following the
methodology proposed by Gheller et al. (1999).
Took advantage of the beams aimed at weighing to quantify the average diameter,
number of internodes and the average height of stalks. To measure the diameter used a
caliper, measuring 60 stems per plot. The measurement time was defined as the stem height
divided by three measured from the base of the stem. To determine when the component
was measured with a ruler, the average length of the beam.
The computer program ASSISTAT Beta version 7.6 of Silva (2011) was used for the
analysis of variance (ANOVA), followed by comparison of means by Tukey method at 5%
probability levels for qualitative (cropping systems), and regression analysis to the qualitative
levels (irrigation water).
Lay-out of area
75 m
Block
75 m
Treatment
1.3 m
Block 2
Block 1
140
m
23.4
m
T
T
T
T
T
T
T
T
T
T1
23.4 m
Lines
avaliable
Block 3
15 m
15 m
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