Evaluation Effect of Different Levels of Zinc and Manganese Nano-Chelate on Quantitative and Qualitative Traits of Cowpea (Vigna unguiculata L.)


Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.


Nano fertilizers are new products which contain readily available nutrients in the nano scale range and are preferred largely due to their efficiency. This research was conducted to assessment the effect of nano chelated of micro nutrient on agronomic traits of Cowpea via factorial experiment based on randomized complete block design with four replications during 2016 seasonal year. The treatments included zinc nano chelated (5, 10 and 10 kg.ha-1) and manganese nano chelated (0, 4 and 8 kg.ha-1). The results of analysis of variance showed that effect of nano chelated of zinc and manganese had a significant effect on plant height, pod length, yield and its components also interaction effect of treatments on number of pods per m2, seed yield, biological yield and protein yield was significant. Result of mean comparison revealed the highest plant height (154.54 cm), pod length (13.14 cm), number of pods per m2 (116.47), number of pods per plant (14.52), number of seeds per pod (11.36), seed weight (23.03) and seed yield (210.08 g.m-2) belonged to 10 kg.ha-1 nano zinc chelate zinc treatment and the lowest amount of mentioned traits belonged to control (no fertilizer). Between different level of nano manganese chelate the highest seed yield and its components belonged to 8 kg.ha-1 treatment. According result of interaction of treatments indicated the highest number of pods per m2 (131.6), seed yield (244.7 g.m-2), biological yield (544.5 g.m-2) and protein yield (76.8 g.m-2) belonged to 10 kg.ha-1 nano zinc chelate and 8 kg.ha-1 nano manganese chelate and the lowest amount of mentioned traits belonged to control (no fertilizer). Finally based on result of this research use 10 kg.ha-1 nano zinc chelate and 8 kg.ha-1 nano manganese chelate improve quantitative and qualitative yield of cowpea and can be advised to farmers.


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