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Title : Study
on minimisation of nitrogen usage by using compost in sugarcane.
Author : R. B.
Khandagave and P.G. Satpute.
This experiment
was laid down on 27th November 1993 with five treatments and four replications. The five
treatments being sole compost (T1), 25% nitrogen plus 75% compost (T2) 50% nitrogen plus
50% compost (T3), 75% nitrogen plus 25% compost (T4) and 100% nitrogen (T5). The quantity
of compost is determined based on its nitrogen contents (2.3% as per the analysis report
of E.P.R.F. Sangli) and nitrogen dose per acre is 100 Kg/acre (recommended dose) and
applied in the form of urea. The experimental observation recorded are as elucidated
below:-
(A) Yield
attributes and yield
a) Number of
internodes, plant height(cms) and mean cane weight(Kg).
Number of
internodes were not varied significantly however the highest were recorded in T1 (22.70)
and lowest being in T5 (21.65). With regards to plant height results obtained are
non-significant but numerically highest plant height was observed in T2 (322.75) and
lowest being in T5 (299.88). Similarly there is no significant results obtained with
regards to mean cane weight but numerically highest mean weight was recorded in T4 (1.66)
and the lowest in T1 (1.30).
b) Number
millable canes ('ooo/ha), yield(MT/ha) and C.C.S. (Percentage).
Number of
millable canes for various treatments were not given significant results, however highest
N.M.C were recorded in T2 (115.93) and lowest being in T1 (99.08). With regards to cane
yield it is observed that none of the treatments varied significantly. However highest
yield obtained in T5 (143.46) and lowest in T1 (113.89). Similarly C.C.S% was not varied
significantly but highest numerical C.C.S value observed in T4 (14.33) and lowest in T1
(12.69).
At 12th months of
crop age the quality attributes like Brix, Pol, Reducing Sugars, Fibre and Moisture
percentage were recorded to know their variation for the above said treatments. Brix
percentage was not varied significantly so is the case with Pol, Reducing sugar, Fibre and
Moisture percentage. However highest numerical values observed with regards to Brix is in
T5 (21.15) and lowest being in T1 (19.53). In pol % highest value observed in T4 (19.10)
and lowest in T1 (16.93). Highest Reducing Sugars were recorded in T4 (0.700) in lowest T3
(0.636). In Fibre highest numerical value noticed in T4 (13.95) and lowest in T2 (13.83).
Similarly, highest moisture % observed in T1 (69.75) and lowest in T4 (68.25).
The above
observations obtained from the experiments revealed that the none of the treatments
influenced for both yield and quality attributes, hence producing non-significant results
with regards to cane yield and C.C.S percentage. Though the sole compost and sole nitrogen
were found on par each other. The reason for getting equivalent cane yield with compost
may not be only through nitrogen content of compost. As compost is also composed of
various essential macro and micro nutrients. Therefore this experiment needs modified
design for the detailed influence of a organic manure on cane quality and yield. Hence a
modified experiment will be laid down in ensuing season with different organic manures
like F.Y.M., Compost and Vermicompost along with bio-fertilizers with and without soybean
as an intercrop in the different promising sugarcane varieties with different levels of
nitrogen. This is as per the decision taken during Monitoring Committee Meeting held at
Belgaum on 5th December 1994.
Table No. 3.
Effect of monthly planting on cane quality and yield.
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