Differential Performance of Lowland Rice Cultivars for Phosphorus Uptake and Utilization Efficiency under Hydroponic and Soil Conditions

Muhammad Irfan, Tariq Aziz, Muhammad Aamer Maqsood, Hafiz Muhammad Bilal, Waqas-ud-Din Khan, Naser Rasheed

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2 Citations (Scopus)

Abstract

Exploiting the genetic variations in crop plants for enhanced P efficiency seems inevitable for sustaining crop productivity on sub-optimal P supplying agro-ecosystems. However, variation in growth medium used for screening germplasm is a major constraint for poor understanding of the P efficiency mechanisms In present studies, lowland rice cultivars were evaluated for P utilization efficiency (PUtE) based on shoot dry matter (SDM) and paddy yield under hydroponic and soil conditions. Results revealed that P deficiency significantly reduced SDM, paddy yield and P uptake under both growing environments. Root depth, root-shoot ratio and root dry matter (RDM) was enhanced in all cultivars but at varying rates in response to P deficiency. Rice cultivar Basmati-2000 produced maximum SDM and paddy yield under adequate and deficient P levels. Root DM correlated significantly with SDM (r = 0.72) and shoot P uptake (r = 68) indicating implications of improved root growth for P acquisition under P deficiency. Rice cultivars exhibited wide diversity for PUtE based on SDM and paddy yield. The highest response to P addition was obvious in cultivar KSK-282 under hydroponic and in IR-6 under soil conditions as indicated by their higher stress factors (i.e., 48 and 49%). The results suggested that large variations exist among rice cultivars to tolerate P deficiency as well as their response to P fertilization. Moreover, the differential performance of cultivars for biomass production and PUtE under hydroponic and soil conditions signified that special consideration must be paid to growing medium while screening rice for P efficiency. (C) 2019 Friends Science Publishers

Original languageEnglish
Pages (from-to)703-710
Number of pages8
JournalInternational Journal of Agriculture and Biology
Volume21
Issue number3
DOIs
Publication statusPublished - 2019

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