Improving Phosphorous Uptake Efficiency and Quality of Maize Through Optimization of Basal Application


Phosphorous (P) dearth in alkaline calcareous soils of Pakistan renders P unavailable for plant uptake. Consequently,
affects grain yield and is major constraint to achieve desired yield potential of field grown maize (Zea mays
L.). The objectives of this study were to enhance phosphorus use efficiency (PUE) by determining thresholds of
basal applied P. Treatments comprised of five rates of basal applied P viz. 0, 30, 60, 90, 120, and 150 kg ha-1. The
experiment was laid out in randomized complete block design (RCBD) with a net plot size of 2.7 m × 5 m, during
autumn season 2013. Improved agronomic attributes; i.e., plant height, cob length, grains per cob, grain-pith
ratio, 1000-grain weight, biomass and grain yield were observed at 120 kg P ha-1. Likewise, higher agronomic
use efficiency of P, grain P content and total P uptake were recorded. Conclusively, application of P at 120 and
150 kg ha-1 would improve grain yield and quality of maize over control. However, 120 kg P ha-1 manifested more
promising results than 150 kg P ha-1.


Nutrient absorption, Fixation, Phenology, Nutrient remobilization, Seed P reserves

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Maydica - A journal devoted to maize and allied species

ISSN: 2279-8013