Impact of Selected Organic Manures on the Growth, Yield, and Soil Properties of Green Onions Under Surface Irrigation

Abstract

A field experiment utilizing surface irrigation carried out to assess the impacts of three types of organic manures pigeon manure, poultry manure, and cow manure on the growth, productivity, and selected soil chemical properties of green onion (Allium cepa L.) under surface irrigation conditions. The experimental design employed were a randomized complete block design with three replicates for each treatment. Each replicate content eight onion seedlings cultivated on a 24 m² plot, with organic manure applied at a rate of 1.5 kg per 6 m² in liquid fermented form. The results shows that pigeon manure significantly improved vegetative growth and yield compared to the other treatment. The highest measurements for plant height 56 cm, fresh weight 85.8 g, and nutrient uptake was recorded under the pigeon manure treatment, followed by poultry manure, cow manure, and the control. The results show that, the highest number of leaves were in poultry and pigeon manure treatments with 10 leaves /plant, while cow manure and the control exhibited the lowest values. Soil potassium content increased significantly with the application of pigeon manure, reaching 191.09 ppm, while potassium concentration in plant tissue about 2.47%. Similarly, phosphorus content in both soil (9.80 ppm) and plant tissue (0.139%) were highest with pigeon manure, surpassing the results from poultry and cow manure treatments. These results indicate that the application of organic manure improve soil fertilities and the productivity of green onion, with pigeon manure emerging as the most effective organic amendment under surface irrigation conditions.