TY - JOUR AU - Hirwa Hubert PY - 2018/09/13 Y2 - 2024/03/28 TI - Effect of P fertilizers use on rice (Oryza sativa) productivity in Southern Province of Rwanda, Rwasave marshland. JF - GPH-International Journal of Agriculture and Research JA - ar VL - 1 IS - 1 SE - Articles DO - UR - https://gphjournal.org/index.php/ar/article/view/55 AB - The present study aimed at evaluating the effect of P fertilizers on rice productivity inRwandan marshlands. It was conducted in Rwasave marshland. A Randomized Complete BlockDesign (RCBD) experiment comprised four P treatments [T1 as 0 kg (control), T2: 30kg, T3:60kg, T4: 90kg of P2O5] replicated four times and Yunkeng was the test rice variety. The soilsamples were randomly collected at 0-30cm depth and various chemical and physical analysesconducted. The results revealed the significant difference (p<0.05) among treatments foravailable P. The laboratory results were pHH2O of 5.37, pHKCl of 4.13 and available P (Bray I) of4.03ppm. The P2O5 had significant (p<0.05) effect on grain yield and yield components andincreased the plant height (109.0 cm), tillering, 241 filled grains/panicle, empty grains/panicle,1000grains weight (50.6gm), and panicle numbers. Tillering activity was the growth parameterthat affected most significantly the grain yield. P rich fertilizer (P2O5) applied at 90kg P ha-1produced the highest grain yield (7.69t/ha) against the lowest grain yield (3.31t/ha) of control.This study revealed that the supply of P fertilizers for some farmers did not meet the ricerequirements. The response of rice to P application depends on available soil P levels. It isnecessary to apply P fertilizers with adequate doses and at the right time in order to maintain thestability of available P in the soil. ER -