Lynne Wong's PhD thesis

0.95 respectively (Tables 2.10 and 2.12). It even increased (Table 2.11) with increasing
green leaves addition. The only difference among the green leaves was that those used for
Trial I had been treated with cane ripener, with their addition to cane stalk giving rise to a
false pol situation.
2.2.2.2 Changes in sucrose, Brix and pol in press juice
Table 2.13 shows that while the addition of dry trash and air-dry bagasse increased the
sucrose (Clerget as well as HPIC), Brix and pol in press juice, green leaves, wetted dry
trash and wetted air-dry bagasse (except HPIC sucrose) did the opposite. This increase
was even higher when some of the moisture present in the dry trash and in air-dried
bagasse was removed. Increases in non-sucrose produced by the addition of EM amounted
to 7.4, 14 and 36% for 5, 10 and 20% green leaves, and are similar to the corresponding
increases due to dry leaves which were 12, 18 and 38%. This is in disagreement with
observations of Arceneaux and Davidson (1944) who found that green leaves, contrary to
dry trash, had a marked influence on the impurities of the juice. The corresponding
changes in non-sucrose due to the addition of air-dried bagasse were –0.2, 0.7 and 1.0%,
much less than the effect produced by the addition of green and dry leaves.
2.2.2.3 Changes in pol and fibre % cane
Addition of all types of EM (green leaves, dry leaves, wetted and extra dry, and bagasse,
wetted and extra dry) produced decreases in pol % cane by about 5, 9 and 18% at the level
of 5, 10 and 20% EM (Table 2.13). The effect of EM on fibre % cane however, was
dependent mainly on the moisture content of the EM added.
2.2.2.4 Losses in sugar recovery
The loss in CCS due to the presence of 5, 10 and 20% green leaves was 4.4, 9.6 and 18%
respectively (Table 2.13), these being the same as for wetted dry leaves and air-dried
bagasse. The losses in sugar recovered due to dry leaves were slightly lower at high
concentrations, i.e. 4.3, 6.5 and 14%, while those due to air-dried bagasse were 4.5, 8.4 and
17% at 5, 10 and 20% trash levels, respectively.
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