tailieunhanh - Nutrient uptakes and their contributions to yield in peanut genotypes with different levels of terminal drought resistance

Different peanut yields under terminal drought might be due to the different nutrient uptakes among peanut genotypes. Nutrient uptake was presumed to be a drought-resistant trait and might involve drought tolerance mechanisms. The aims of this study, therefore, were to characterize the effect of terminal drought on peanut nutrient uptake and to investigate the genotypic variability of nutrient uptake and its interactions with terminal drought. | Turkish Journal of Agriculture and Forestry Research Article Turk J Agric For (2014) 38: 781-791 © TÜBİTAK doi: Nutrient uptakes and their contributions to yield in peanut genotypes with different levels of terminal drought resistance 1 1, 1 1 Wunna HTOON , Sanun JOGLOY *, Nimitr VORASOOT , Banyong TOOMSAN , 1 2 1 Wanwipa KAEWPRADIT , Naveen PUPPALA , Aran PATANOTHAI 1 Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Muang, Khon Kaen, Thailand 2 Agricultural Science Center, New Mexico State University, Clovis, New Mexico, USA Received: Accepted: Published Online: Printed: Abstract: Different peanut yields under terminal drought might be due to the different nutrient uptakes among peanut genotypes. Nutrient uptake was presumed to be a drought-resistant trait and might involve drought tolerance mechanisms. The aims of this study, therefore, were to characterize the effect of terminal drought on peanut nutrient uptake and to investigate the genotypic variability of nutrient uptake and its interactions with terminal drought. Field experiments were conducted at the Field Crop Research Station of Khon Kaen University, Khon Kaen, Thailand, from October 2010 to January 2011 and October 2011 to January 2012. Six peanut genotypes were tested under well-watered and terminal drought conditions. Data were recorded for N, P, K, Ca, and Mg uptake and biomass (BM) and pod yield (PY); the ratio of nutrient uptake under stress condition was calculated. Terminal drought significantly reduced nutrient uptake in both years, and peanut genotypes differed considerably with respect to nutrient uptakes under well-watered and terminal drought conditions. ICGV 98324 and ICGV 98348 were the best genotypes for nutrient uptake under terminal drought. Tainan 9 and Tifton 8 had low nutrient uptake under both conditions. ICGV .