TAILIEUCHUNG - Integrated effect of different N-fertilizer rates and bioslurry application on growth and N-use efficiency of okra (Hibiscus esculentus L.)

Bioslurry obtained from biogas plants has the potential to reduce the use of expensive chemical fertilizers and increase yields. A field experiment was conducted to investigate the growth response and yield production of okra fertilized with various combinations of bioslurry and nitrogen fertilizer. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2014) 38: 311-319 © TÜBİTAK doi: Research Article Integrated effect of different N-fertilizer rates and bioslurry application on growth and N-use efficiency of okra (Hibiscus esculentus L.) 1, 2 2 2 Muhammad SHAHBAZ *, Muhammad Javed AKHTAR , Wazir AHMED , Abdul WAKEEL 1 Institute of Plant Nutrition, Justus Liebig University Giessen, Giessen, Germany 2 Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad, Pakistan Received: Accepted: Published Online: Printed: Abstract: Bioslurry obtained from biogas plants has the potential to reduce the use of expensive chemical fertilizers and increase yields. A field experiment was conducted to investigate the growth response and yield production of okra fertilized with various combinations of bioslurry and nitrogen fertilizer. The experiment was planned according to randomized complete block design with 3 replications. Bioslurry was analyzed for its composition and was applied at the rate of 600 kg ha–1 along with 50%, 75%, and 100% of the recommended dose of N fertilizer for the production of okra. Phosphorus and potassium fertilizers were added according to recommended rates per hectare. Compared to inorganic N alone, the application of bioslurry alongside NPK fertilizers applied at reduced rates significantly increased the okra fruit yield as a consequence of 14%–31% enhanced plant height, 12%–14% additional branches per plant, and 25%– 36% more fruits per plant. Moreover, bioslurry improved root length by 13%–45%, which resulted in an increased N uptake by plants and improved N use efficiency. Our results suggest that the application of bioslurry alongside reduced rates of N fertilizer is a viable strategy for the sustainable production of okra, especially under semiarid climatic conditions. Key words: Biogas .

• Nông nghiệp
• Biogas waste
• Effective efficiency
• Lady finger
• Organic farming
• Nitrogen fertilizer
• Balanced fertilization
• Organic waste
• Survey & inspection
• Deenbandhu biogas model
• Analysis report
• Deenbandhu biogas plants installed
• Digested biogas slurry
• Waste utilization
• Quantitative screening
• Lignocellulolytic enzyme production
• Lecture Solid waste management
• Solid waste management
• Anaerobic digestion/biogasification
• Biogas generatio
• Methane production
• Biogas yield
• Domestic wastewater
• Food waste
• Pilot scale
• Organic fraction of food waste
• Biogas production
• Microbial inoculum
• Anaerobic digestion
• Kitchen waste
• Cattle dung
• Cabbage plants
• Biogas reactors
• Plasmodiophora brassicae
• Antagonist microbes
• Club root disease
• Bio gas
• Alternate feed stock
• Urban house hold biogas plant
• Organic manure in the garden
• Anaerobic bottles
• Biodegradable hostel kitchen food waste
• Total solids
• Students hostel kitchen food wastes
• Animal husbandry
• Anaerobic co digestion
• Pig manure
• Organic fraction
• Agricultural organic