Blanket recommendation of nitrogen (N) for maize would not be applicable as the new high yielding hybridshave been grown in Nepal. A field experiment was carried out during spring season at Badhaiyatal, Bardiya to determine optimum N level for hybrid maize. The treatments consisted of three commercial maize hybrids namely Rampur hybrid-10, Rajkumar and Pioneer-3522 and four N levels i.e., 150 kg ha-1, 175 kg ha-1, 200 kg ha-1 and 225 kg ha-1. The experiment was carried out in split-plot design with maize hybrids as main plot factor and N levels as sub plot factor in three replications. Results revealed that all yield attributes were significantly (0.05) influenced by variety and nitrogen levels except number of ears harvested per hectare. The grain yield with N level @ 225 kg ha-1 (8.69 t ha-1) was found higher than remaining N levels. The higher yield with 225 kg N ha-1 was because of significantly (0.05) higher leaf area index (4.67 at 75 Days After Sowing, plant height (248.50 cm at 75 DAS), number of kernels per ear (467), ear length (18.59 cm), ear circumference (15.16 cm) and shelling percentage (70.68%). All three maize hybrids: Pioneer 3522 (8.46 tha-1), Rajkumar (8.05 t ha-1) and Rampur hybrid-10 (7.63 t ha-1) were found similar in grain yield. The yield attributes viz., ear length, and ear circumference number of kernels per ear showed positive correlation with grain yield. Therefore, application of N@ of 225 kg ha-1 for the maize hybrids during spring season is suggested in Bardiya.
Bio-floc technology is the blue revolution in aquaculture & new technique of enhancing water quality & utilizing feed wastes in the aquaculture system. It follows the concept of conversion of ammonium in addition to organic nitrogenous wastes into bacterial biomass in where heterotrophic bacterial growth is stimulated & nitrogen uptake through the production of microbial proteins is promoted by the addition of carbohydrates to the pond. Nitrogen generated by uneaten feed and excreta of cultured organisms is converted into proteinaceous feed available for those same organisms. This technique recycles nutrients & nitrogenous wastes by maintaining a high carbon: nitrogen ratio and provides essential & higher quality nutrition to the shrimps & fishes in achieving fast growth, lesser FCR & possibility to prevent diseases. Water requirement in BFT is extremely less & it is advantageous than the conventional system where there is continuous water & nutrient recycling, lower FCR. On the other hand, many challenges are existing in practicing bio-floc in Nepal as it requires frequent pond monitoring by the technical manpower. The choice of carbon source should be made wisely and correctly as the performance of fish and water quality in the bio-floc ponds depend highly upon carbon source. Further, vitamins required for fish may not be produced by microbes thus needed to identify them and supply through the feed. However, the practice of bio-floc technology will be proven worth for farmers in Nepal. Int. J. Appl. Sci. Biotechnol. Vol 8(2): 140-145
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.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.