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Influence de la date de récolte sur la germination des semences de quelques variétés de riz NERICA pluvial

Abstract : The present study aims to determine the effect of harvest date on rice seeds germination. The experiment was carried out at Nkolbisson, a locality within the forest agro-ecological zone characterized by a bimodal rainfall pattern. Four varieties of NERICA: NERICA 3, NERICA 8, NERICA 9 and 13 NERICA widely grown in Cameroon were used and planted in a completely randomized block design. Rice seed was produced according to the standards of its production and were harvested at six different dates: 20, 25, 30, 35, 40 and 45 days after heading. .The harvested seeds were dried at 13% moisture content before rate of the germination test. The results showed that the harvest dates have a significant effect on the latency, the time corresponding to 50% sprouted grains (T50), the number of sprouted grains, number of dead seed and the number of non sprouted grains. There was significant difference between rice varieties evaluated and the different harvesting date. The germination rates 98.88%, 99.44%, 99.75% and 97.00% were obtained respectively for the harvest dates of 30, 35, 40 and 45 days after 50% heading.. The harvest dates 20 and 25 days after 50% heading presented low germination rates. With these early harvesting dates, the mean percentages of dead seeds ranged between 18.25% and 55.25%. Too early harvest had a negative impact on rice seeds germination. To obtain good germination rate, it is recommend to harvest rice at 30 and 40 days after 50% of heading.
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Contributor : Marie Noel Melie Feyem <>
Submitted on : Monday, July 4, 2016 - 10:06:15 AM
Last modification on : Saturday, July 9, 2016 - 1:05:01 AM


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  • HAL Id : hal-01338899, version 1



M. N. Melie Feyem, J. M. Bell, D. Malaa Kenyi, M.Y. Fankou Dougoua, K. Moche, et al.. Influence de la date de récolte sur la germination des semences de quelques variétés de riz NERICA pluvial. 2016. ⟨hal-01338899⟩



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