Intercropping of blackgram with three varieties of cotton
1988
Sarder, N.A. | Rashid, A.S. | Moniruzzaman, A.F.M. (Bangladesh Agricultural Research Inst., Joydebpur, Dhaka (Bangladesh))
Cotton and blackgram (Vigna mungo) intercropping was found suitable crop combination. The agronomic performance of three varieties of cotton namely BAC-77; Deltapine-16 and BAC-24 were evaluated when intercropping with varying levels of blackgram population. Two plant population levels of blackgram as (a) one row and (b) two rows (continuous) in between the rows of cotton were used. The same treatments were practiced with all three cotton varieties. All intercropping combinations were compared with their respective sole crop treatments. In all cotton varieties (a) produced more fiber yield than (b) and no significant difference between (a) and (b) was observed in case of blackgram yield. The variety BAC-77 was the highest seed cotton yielder in both sole and intercrop treatments. Deltapine-16 was the lowest fiber yielder whereas BAC-24 was the intermediate in both sole and intercrop treatments. Intercropping BAC-77 with one and two rows of blackgram had the LER of 1.80 and 1.49 indicating that 80 and 49% more land would be needed under monoculture to produce the equivalent yield. Deltapine-16 with one and two rows of blackgram had the LER of 1.52 and 1.33; similarly BAC-24 had the LER of 1.72 and 1.69 with one and two rows respectively. The LER of all the intercrop treatments were more than one. From this study it can be concluded that one row of blackgram in between the cotton rows will be more profitable than two rows of blackgram and even sole crop of cotton.
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