Title: Nutrient Management of Potato Based on Soil and Plant Analysis
Abstract: Soil and plant analysis are complementary for a corrective fertilizer application to achieve optimum yields and reduce production cost by increasing fertilizer efficiency. In this experiment, the suitable fertilizer rate was estimated from nutrient requirement of Atlantic potato and soil nutrients. The fertilizer rates included 1) 0.75 fold of the estimated rate (17-4.5-30 kg N-P2O5-K2O/rai), 2) 1 fold of the estimated rate (23-6-40 kg N-P2O5-K2O/rai) and 3) 1.25 fold of the estimated rate (29-7.5-50 kg N-P2O5-K2O/rai) compared with farmer’s practice (34.5-34.5-46.5 kg N-P2O5-K2O/rai). The results revealed that all treatments had similar fresh biomass, dry biomass, nutrient concentrations and nutrient contents in the above- below ground parts throughout growing period. Meanwhile, tuber yield and tuber size of potato receiving fertilizer at 1.25 fold of the estimated rate had the greatest tuber yield of 3.14 ton/rai and gave the lowest undersized tubers, whereas the highest undersized tubers of 22% was found in potato receiving fertilizer as farmer’s practice. For the nutrition values, there was no statically significant difference among treatments. This study concluded that the application of fertilizer at 1.25 fold of the estimated rate was appropriate for potato production since it could reduce 27% of total amount of fertilizer use by farmer and fertilizer cost also decreased by 20% (972 baht/rai). Moreover, tuber yield and profit increased by 6% (190 kg/rai) and 4,497 baht/rai, respectively when compared with farmer’s practice.
Publication Year: 2017
Publication Date: 2017-01-01
Language: en
Type: article
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