Salinity is one of the most important abiotic stress that affects the yield in most of the crops under cultivation. The area under black gram (Vigna mungo L. Hepper) is decreasing in recent years due to soil salinity problem. Thirteen black gram genotypes viz., VBN1, VBN2, VBN3, VBN(Bg) 4, VBN(Bg ) 5, VBN(Bg) 6, VBN 7 and VBN 8, VBG 12-034, VBG 12-062, VBG 12-110, VBG 12-111, VBG 13-003 and VBG 14-016 were screened under three EC level (4.0 EC, 11.0 EC and 16.0 EC) and compared with 0.0 EC (control). The mean germination percentage of all the thirteen genotypes studied illustrated reduced level of germination percentage with increasing salinity level. At the highest salinity level (16.0 EC) the germination percentage was significantly affected compared to 4.0 EC and 11.0 EC. The grand mean of plumule length was more at 4.0 EC and was reduced to half (16.0 EC) as compared to control. The root grew longer at 11.0 EC (4.91 cm) as compared to 4.0 EC (4.83 cm) and 0.0 EC (3.02 cm), where ever showed drastic reduction at 16.0 EC (1.92 cm). The grand mean value of dry matter weight increased concomitantly with salinity. The radical length had positive and significant correlation with dry matter weight at 11.0 EC (0.657) where as positive and non-significant correlation with 4.0 and 16.0 EC suggested that radicle length is the most useful parameter to select salinity tolerant black gram genotypes. Based on grand mean performance of the thirteen genotypes evaluated, the genotype VBG-14-016 followed by Vamban 4, Vamban 8 and VBG-12-062 outperformed than all other genotypes, while VBG-13-003 was highly susceptible followed by VBG-12-034.
An experiment on response of rice to nitrogen under aerobic and transplanted conditions was conducted in split-split -plot design with two methods of rice cultivation, seven rice varieties and five nitrogen levels. The grain yield was significantly higher in transplanted rice compared to aerobic rice. Significantly higher grain yield was observed with MTU 1001 and MTU 1010 as compared to IR 64, Tella hamsa and Rajendra and the grain yield in the former two varieities was comaparable with Naveen and Erramallelu. Increase in grain yield with every 100 kg of N ha-1 from 100 kg to 300 kg ha-1 was significant. Significant interaction effect on grain yield was observed due to method of crop establishment, varieties and nitrogen levels. Aerobic rice received 627 mm of irrigation water as compared to 1228 mm in transplanted rice and the mean water productivity was higher under aerobic rice (0.49 kg grain m-3) as compared to transplanted rice (0.31 kg grain m-3).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.