PERFORMANCE OF BLACKGRAM VARIETIES IN ASSOCIATION WITH DIFFERENT CITRUS SPECIES IN SYLHET

Abstract

The study was conducted at Citrus Research Station, Bangladesh Agricultural Research Institute, Jaintapur, Sylhet to evaluate the response of blackgram grown in association with different citrus species. There were two Citrus tree species as like Pummelo (P), Sweet orange (SO) and three blackgram varieties as like BARI Mash-1 (V1), BARI Mash-2 (V2), BARI Mash-3 (V3) were used for the study. The analysis was done following Randomized Complete Block Design (RCBD) with three replications. In case blackgram the treatments were SV1 =Sole BARI Mash -1, SV2 =Sole BARI Mash -2, SV3 =Sole BARI Mash -3, PV1 =BARI Mash -1 with pummelo, PV2 =BARI Mash -2 with pummelo, PV3=BARI Mash -3 with pummelo, SOV1 =BARI Mash -1 with sweet orange, SOV2 = BARI Mash -2 with sweet orange, SOV3 =BARI Mash -3 with sweet orange. In case of citrus the treatments were SP = Sole Pummelo, SSO = Sole sweet orange, PV1= BARI Mash -1 with pummelo, PV2= BARI Mash -2 with pummelo PV3 = BARI Mash -3 with pummelo, SOV1= BARI Mash -1 with sweet orange, SOV2= BARI Mash -2 with sweet orange, SOV3= BARI Mash -3 with sweet orange. Results showed that citrus species had pronounced effect on blackgram crop growth at different days after sowing. Sole crop showed the highest value for most of the parameters at 30 and 70 DAS while at 45 DAS pummelo associated crops showed better performance. Sole pummelo associated crops also gave the highest yield. Blackgram varieties also had pronounced effect on growth and yield performance of citrus when grown in association. Growth characters were prominent with BARI Mash-2 at different DAS while yield contributing characters were found to be the best in BARI Mash-3.At 30 DAS sole BARI Mash-1 performed better but BARI Mash-2 in association with pummelo and sweet orange showed better performance. Unlike at 45 DAS the sole BARI Mash-1and BARI Mash-2 and pummelo associated BARI Mash-1, BARI Mash- 2 and BARI Mash-3 found to be better with growth parameters. At 70 DAS the BARI Mash-1 and BARI Mash-3 without association of citrus trees, and with association of pummelo was found to be better with growth parameters. BARI Mash-2 and BARI Mash-3 without association of citrus trees was found, but BARI Mash-1 and BARI Mash-3 with association of pummelo and BARI Mash-3 with association of sweet orange was prominent in case of yield and yield contributing characters. Result revealed that BARI Mash-1 and BARI Mash-2 with the association of pummelo and BARI Mash-3 with the association of sweet orange may be the better option for growing blackgram in agroforestry system.