Evaluation of sugar beet cultivars at different row proportions in intercropping with sugarcane and its nitrogen management
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Date
2013
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UAS Dharwad
Abstract
Two field experiments namely 1. Intercropping of sugar beet cultivars with different
row proportions in sugarcane and 2. Performance of sugar beet to sources of nitrogen and
liquid manures were conducted at Agricultural Research Station (ARS), Madhurakhandi
(Dist. Bagalkot), University of Agricultural Sciences, Dharwad during the year 2010-11 and
2011-12. The first experiment consisted of evaluation of sugar beet cultivars (Cauvery,
Shubhra, Magnolia and Calixta) with different row proportions (1:1, 1:2 and 1:3) in
sugarcane. There were seventeen treatment combinations laid out in randomised complete
block design with three replications. The second experiment was conducted to study the
influence of sources of nitrogen (SN1, SN2, SN3, SN4 and SN5) and liquid manures (LM1, LM2,
LM3, LM4 and LM5) on sugar beet. The experiment was laid out in split plot design with three
replications where in sources of nitrogen and liquid manures were assigned to main and
subplot, respectively.
The results of first experiment indicated that sole sugarcane and sugarcane + sugar
beet in 1:1 RP recorded significantly higher cane yield (101.39 and 96.66 (Avg. of all
cultivars) t ha-1, respectively) and sugar yield (11.07 and 10.55 (Avg. of all cultivars) t ha-1,
respectively) compared to sugarcane + sugar beet in 1:2 and 1:3 RP. Sugar beet cultivars
Cauvery and Shubhra recorded significantly higher tuber (85.58 and 79.84 t ha-1,
respectively) and sugar yield (9.76 and 9.00 t ha-1, respectively) in sole cropping than
intercropping treatments. In intercropping system sugar beet cultivars Cauvery and Shubhra
in 1:3 and 1:2 row proportions recorded significantly higher tuber and sugar yield than 1:1
RP. Intercropping of sugarcane + sugar beet in 1:2 and 1:3 RP recorded significantly higher
sugarcane equivalent yield, LER, ATER, SPI, total sugar yield, net returns when compared to
1:1 RP, but B:C was significantly higher in 1:1 RP.
In second trial, application of 100 per cent RDN (120 kg ha-1) through inorganic
fertilizer (IF) along with foliar spray of vermiwash (VW) (20%) and cow urine (CU) (10%) at
30 and 60 DAS (SN1LM4) recorded significantly higher tuber (80.13 t ha-1), sugar yield (9.28
t ha-1), net returns (Rs. 64528 ha-1) and B:C (2.49) than other treatment combinations.
However, application of 75 per cent RDN through IF + 25 per cent RDN through
vermicompost and poultry manure in equal proportions along with foliar spray of VW (20%)
and CU (10%) at 30 and 60 DAS (SN2LM4) remained on par with SN1LM4.