Nutrient Uptake by Rice Plant and Its Effect on Yield¹

Abstract

Synopsis Dry matter synthesis and nitrogen and phosphate uptake by rice plant in field culture were highly correlated with grain yield. During intermediate stages of plant development, however, these functions showed steady progress in some centers and different degrees of interruption in some others. The interruptions caused losses in grain yield and were attributable to physiological consequences of lodging.

Nitrogen and phosphorus fertilization in upland rice in the municipality of Humaitá at Amazonas State

“…These results corroborate those of Fageria & Oliveira (2014) who report the interaction between nitrogen and phosphorus. Studies show that nitrogen and phosphorus directly affect rice production, the point of maximum production being with a ratio of 5:1 between absorbed nitrogen and phosphorus (Basak, 1962;Oliveira et al, 1994).…”

Yield of rice as affected by fertilizer rates, soil and meteorological factors

“…A significant positive interaction was found between N and P in two seasons, and in four seasons a tendency in that direction was present. Basak (1962) reported that N application not only increases N uptake but also increases P uptake over the control plots. However, P application in combination with N and NK fertilizer showed no influence on P uptake or grain yield over N application alone.…”