Effect of P fertilizers use on rice (Oryza sativa) productivity in Southern Province of Rwanda, Rwasave marshland.

  • Hirwa Hubert
Keywords: Rwasave marshland, Phosphorus (P),, fertilizer, Oryza sativa, yields.


The present study aimed at evaluating the effect of P fertilizers on rice productivity in
Rwandan marshlands. It was conducted in Rwasave marshland. A Randomized Complete Block
Design (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 soil
samples were randomly collected at 0-30cm depth and various chemical and physical analyses
conducted. The results revealed the significant difference (p<0.05) among treatments for
available P. The laboratory results were pHH2O of 5.37, pHKCl of 4.13 and available P (Bray I) of
4.03ppm. The P2O5 had significant (p<0.05) effect on grain yield and yield components and
increased 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 parameter
that affected most significantly the grain yield. P rich fertilizer (P2O5) applied at 90kg P ha-1
produced 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 rice
requirements. The response of rice to P application depends on available soil P levels. It is
necessary to apply P fertilizers with adequate doses and at the right time in order to maintain the
stability of available P in the soil.


Download data is not yet available.

Author Biography

Hirwa Hubert

University of Lay Adventists of Kigali (UNILAK).


Abolfazli F. A. Forghani, and M. Norouzi
(2012). Effects of Phosphorus and organic
fertilizers on Phosphorus fractions in
submerged soil. Journal of Soil Science and
Plant Nutrition, 2012, 12 (2), 349-362.
Available: http://dx.doi.org/10.4067/S0718-
Alam MM, Ali MH, Ruhul Amin AKM,
Hassanuzzaman M. 2009. Yield attributes,
yield and harvest index of three irrigated
rice varieties under different levels of
Phosphorus. Advance in Biological
Research.3 (3-4)132-139.
Ahmad S., Hussain A., Ali H. and A. Ahmad,
2015. Grain Yield of Transplanted Rice (Oryza
sativa L.) as Influenced by Plant Density and
Nitrogen Fertilization. Journal of Agriculture
& Social Sciences. Available at:
http://www.ijabjass.org. [Accessed:
Awan, T. H., Ali, R. I., Manzoor, Z.,
Ahmad, M., and Akhtar, M. 2011. Effect of
different Nitrogen levels and row spacing on
the performance of newly evolved medium
grain rice variety, ksk-133. The Journal of
Animal & Plant Sciences, 21(2): 2011, Page:
Boyer J. S. 1982. Plant Productivity and
Environment. Science 29 Oct 1982. Vol.
218, Issue 4571, pp. 443-448. DOI:
Brady N.C. and Weil R.R., (2002). The
nature and properties of soils. 13th ed.
Prentice Hall. New Jersey USA.
Shah F., J. Huang, K. Cu I, L. Nie, T. Shah,
C. Chen AND K. Wang, 2011. Impact of
high-temperature stress on rice plant and its
traits related to tolerance. Journal of
Agricultural Science (2011), 149, 545–556.
Cambridge University Press 2011. DOI:
FAO 2007. Food and Agriculture
Organization of United Nations (online).
Available at: http://faostat.fao.org.
[Retrieved: 11/4/2017].
FAO, 2010. Soil Classification (Ferralsols).
www.fao.org . Retrieved on 21/12/2016.
Frageria, N. K. M. P. Barabosa, 1982.
Screening rice cultivars for torelance to low
levels of available soil phosphorus. RavistaBrasiliera de Ciencia do solo, 6(2): 146-151.
Gebrekidan H. and M. Seyoum. 2006.
Effects of Mineral N and P Fertilizers on
Yield and Yield Components of Flooded
Lowland Rice on Vertisols of Fogera Plain,
Ethiopia. Journal of Agriculture and Rural
Development in the Tropics and Subtropics.
Volume 107, No. 2, 2006, pages 161–176.
Haifa, 2014. Nutritional recommendation
for rice. Pionneering the future. Available
on http://www.haifa-group.com/. Accessed
on 10/05/2014.
Hakizimana J., 2007. Estimation du niveau
de suffisante du phoshore pour la
production du riz dans le marais de Migina.
Hazelton, P. A., and Murphy, B. 2007.
Interpretation Soil tests results: What Do All
the Number Means? Available at
University of Rwanda. Available on
. [Retrieved: 11/4/2017]
Mutwewingabo, B. and Rutunga, V., 1987.
Etudes des sols des stations d’ essaie du
project d’intensification de l’ agriculture de
Gikongoro. 9 (PIA) 11.
Nahayo, D., Wali, U. G. and Anyemedu, F.
O. K., 2010. Irrigation practices and water
conservation opportunities in Migina
marshlands. International Journal of
Ecology& Development, 16: 100-112.
NISR, 2015. Statistical YearBook 2015.
Statistical Report. Kigali-Republic of
Rwanda. Available
ation/statistical-yearbook-2015. [Accessed:
Oteng, J.W. 1997. Rice production and
development in Ghana. IRC Newsl. 46: 38-
Pierre W.H. and Norman, A. G. 1953. Soil
Fertilizer Phosphorus. New York,
Academic Press 153-188. (Agronomy, 14).
Pietriwicz P., 1985. Les sols de la region d’
action du project agro pastoral de
Nyabisindu, Rwanda.
Rwanda Agricultural Development
Authority (RADA), 2007. Increase rice
productivity through integrated input
management progress report. MINAGRI,
Kigali, Rwanda. 1- 20p.
S.H.E.R., 2003. Report provisoire phase 2.
Etudes de faisabilité, Marais de la Migina”,
Ministère de l’agriculture, de l’elevage et
des forêts. Pp.56-70.
Sanchez, P.A., Shepherd, K.D., Soule, M.J.,
Place, F.M., Buresh, P.J., Izac, A-M.N.,
Mokwunye, A.U., Kwesiga, F.R., Nderitu,
C.G. and Woomer, P.L. 1997. Soil fertility
replenishment in Africa: an investment in
natural resource capital. In: Buresh, R.J.,
Sanchez, P.A. and Calhoun, F. (Eds).
Replenishing Soil Fertility in Africa. Soil
Science Society of America Special
Publication No. 51. Madison, Wisconsin,
USA, pp. 1-46.
Smack, N.E. 1985. Phosphorus dynamics in
soils and landscapes. Geoderma.
Snyder, C.S. 2002. Effect of soil Flooding
and drying on phosphorus reactions.
News&views. Potash, Phosphate Institute
Uwanyirigira J., 2013. Nitrogen and
Phosphorus sufficiency levels assessment for
irrigated lowland rice growth and yield in
Cyunuzi, Eastern-Rwanda. A thesis
submitted in partial fulfillment of the
requirement for the degree of Masters of
Science in Sustainable Soil Resources
Management. Department of Land Resource
Management and Agricultural Technology
University of Nairobi.
Vahed Shokri H., Shahinrokhsar P. and
Heydarnezhad F., 2012. Performance of
phosphate solubilising bacteria for
improving growth and yield of rice
(Oryza sativa L.) in the presence of
phosphorus fertilizer. International Journal
of Agriculture and Crop Sciences (IJACS).
ISSN 2227-670X 2012. Available on:
http://ijagcs.com/wpcontent/uploads/2012/10/1228-1232.pdf .
[Retrieved: 11/4/2017].
Yosef Tabar S., 2013. Effect of Nitrogen
and Phosphorus Fertilizer on spikelet
Structure and yield in rice (Oryza sativa L).
International Journal of Agriculture and
Crop Sciences (IJACS). Iran Islamic Azad
University. ISSN 2227-670X. Available
online at www.ijagcs.com . [Retrieved:
How to Cite
Hubert, H. (2018). Effect of P fertilizers use on rice (Oryza sativa) productivity in Southern Province of Rwanda, Rwasave marshland. GPH-International Journal of Agriculture and Research E-ISSN 2805-4362 P-ISSN 2805-4340, 1(1), 01-13. Retrieved from http://gphjournal.org/index.php/ar/article/view/55