poster - International Conference of Agricultural Engineering

Figure 1. Lay out of the experimental area, especially the treatments distributed within each
block and available lines of sugar cane within treatments.
3. Results and discussion
Table 4 presents the data analysis of variance (ANOVA) for each variable. It was
observed that there were significant differences for weight of stems, yield of cane and sugar
yield, stems height and diameter of stems when subjected to increasing irrigation level.
These results are illustrated by the regression curves presented in Table 6. It was also
observed (Table 1), there was a significant effect on the weight of the straw stems yield of
cane and sugar yield, moisture, Pol, and stem diameter. In Table 1, it was observed that
there was no interaction between irrigation and soil cover for the variables evaluated.
The results of productivity and yield of sugar cane are shown in Table 2 and Table 6. The
yield of cane sugar was less than 70 t/ha due to irregularity in the distribution of rainfall
during the period in which the experiment was conducted.
TABLE 1. Results of analysis of variance (ANOVA) for number and weight of stems, agricultural
productivity and industrial cane sugar by area.
SQUARE AVERAGE
Variation cause
Fredow
Weigth of
Yield of sugar
Stems / m
Yield of cane
degree
stems
Irrigation levels 4 0.62558 -- 0.04317 -- 402.93995 -- 10.21767 --
Organic mulch 1 0.01531 ns 0.04307** 312.14273 * 2.88116 ns
Irrig. x Org. mulch 4 0.68954 ns 0.00391 ns 35.49160 ns 0.54313 ns
Treatment 9 0.58620 ns 0.02571 ** 229.54099 ** 5.10271 **
Blocs 2 3.56127 ns 0.00437 ns 236.56535 * 2.39692 ns
Error 18 0.39432 0.00317 45.22659 1.21203
Total 29
SQUARE AVERAGE
Variation cause Moisture Fiber Pol Diameter Heigth
Irrigation levels 1.22113 -- 0.78266 -- 0.86944-- 0.02205 -- 1374.05222 --
Organic mulch 22.22241 ** 1.61472 ns 1.54587* 0.14100 ** 146.67111 ns
Irrig. x org. mulch 0.12184 ns 0.10119 ns 0.05418 ns 0.00306 ns 57.79978 ns
Treatment 3.06603 ** 0.57224 ns 0.58226 ns 0.02683 ** 652.67546 **
Blocs 7.37347 ** 0.60817 ns 3.10657 ** 0.00602 ns 671.29255 **
Error 0.65223 0.36986 0.26247 0.00614 72.04587
Total
* significant at 5% probability ** significant at 1% of probability.
TABLE 2. Average agricultural productivity of sugar cane and sugar per area
(3rd harvest) in relation to irrigation water rescue applied in areas with and
without straw covering soil, Pirinopolis-GO, Brazil.
Yield cane (t/ha)
Yield sugar cane (t/ha)
Treatment With organic
mulch
Without organic
mulch
With organic
mulch
Without organic
mulch
No irrigated 51.30 46.90 6.80 6.30
20 mm 59.00 56.50 8.10 7.90
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