Optimum Rate of Fertilizer for Shallot Production in Ban Hong District, Lamphun Province
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Abstract
A study on the proper fertilizer management for the quality shallot production, Ban Hong variety was performed in the farmers’ field at Ban Hong district, Lamphun province, from November 2014 to February 2015. The experiment design was a randomized complete block design (RCBD) with 4 replications and 5 fertilization treatments. The fertilizer (N:P2O5:K2O) application treatments consisted of 1) 16:0:0 kg/rai (based on shallot’s nutrient requirement and soil analysis data), 2) 23:4:35 kg/rai (based on shallot’s nutrient requirement), 3) 23:20:50 kg/rai (common rate for shallot production), 4) 13.6:5:10 kg/rai (applied by the owner of experimental field) and 5) non-fertilizer application (control treatment). The results revealed that fertilizer application at the rate of 23:20:50 kg/rai (treatment 3) significantly increased growth of shallot (height and dry weight of above - ground part) in comparison to the treatment 1 and 2 at 60 DAP. At the harvest period, the shallot’s fresh yield (7.89-8.09 ton/rai) obtained from fertilizer application treatments (1-4) were significantly higher than the non-fertilizer treatment (3.64 ton/rai). However, all fertilizer application treatments did not affect bulb diameter and percent of damage bulb and weight loss during 90 days-storage significantly. The bulb diameter was found in the range 32.07-35.98 mm. and the percent of damage bulb range was in the rage 2.57-3.30%, while the percent of weight loss was in the range of 47.70-51.20%. The results from this study suggested that fertilizer application (N:P2O5:K2O) at the rate of 16:0:0 kg/rai was sufficient and suitable for producing good yield and bulb quality of shallot Ban Hong variety.
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References
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