Hoang Tai DINH, Wanwipa KAEWPRADIT, Sanun JOGLOY, Nimitr VORASOOT, Aran PATANOTHAI

Nutrient uptake of peanut genotypes with diferent levels of drought tolerance under midseason drought

The objective of this study was to investigate the responses of peanut genotypes to midseason drought, regarding in particularnutrient uptakes and their correlations with biomass production and pod yield. Te experiment was conducted during the dry seasons of2011/12 and 2012/13. Five peanut genotypes with diferent levels of drought tolerance and 2 water regimes (well-watered and midseasondrought) were laid out in a split-plot design with 4 replications. Midseason drought was imitated by stopping irrigation at 30 days aferplanting (DAP) and then rewatering at 60 DAP. Te data were recorded for contents of N, P, K, Ca, and Mg in plant tissues, biomassproduction, yield components, and pod yield at harvest. Te results showed that midseason drought signifcantly reduced the uptake ofall nutrient elements. Peanut genotypes with higher levels of drought tolerance took up more nutrients than those with lower levels. Teuptake of all nutrient elements contributed to biomass production, pod yield, and the number of pods per plant. ICGV 98305 was thebest genotype with the highest uptakes of all observed nutrient elements.

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