TITLE:
Field Evaluation of Growth and Yield of Two Local Rice Varieties (Tox-728-1 and Madjitolngar) in Response to Indogenous Mycorrhizal Inoculation in South-Chad
AUTHORS:
Yoradi Nadjilom, Steve Takoukam Toukam, Minista Issa, Albert Ngakou
KEYWORDS:
Endomycorrhiza Inoculants, Grain Growth and Yield, Maditolngar and Tox-728-1 Rice Variety, Chad
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.11 No.8,
August
6,
2020
ABSTRACT: This study was carried out to
find out how dependent are two local rice varieties
(Magitolngar and Tox-728-1) to inoculation with selected endogenous
arbuscular mycorrhizal fungi (AMF) in a field where they were isolated. The
multi-indigenous endomycorrhiza spores previously isolated and identified were
the active ingredient in the production of bioinoculants used for this purpose.
Spores massively multiplied from the rhizosphere of each rice variety in each
of the four locally collected soils substrates were harvested to constitute 08
AMF inoculants (Kema = T1; Lama = T2; Latox = T3; Ndjatox = T4; Koloma = T5;
Kolotox = T6; Ndjama = T7; Ketox = T8). These inoculants were field tested on the two rice varieties at
Kelo, under a complete randomized block design, comprising 10 treatments
(8 inoculants, 01 positive control = T9, 01 negative control = T10), each of
which was repeated thrice. The analysis of data indicates that AMF-inoculated
plants were taller, developed more tillers/plant, and produced more rice grains/panicle
than non-AMF-inoculated plants for both studied rice varieties. The rice
variety Madjitolngar yielded more grains
(7.5 t/ha) than the Tox-728-1 variety (5.8 t/ha). Moreover, inoculants
Koloma (T1), Latox (T3) and Kolotox (T6) on the one hand, Koloma (T1) and Ketox
(T8) on the other hand, were best suited for the improvement of growth and
yield of the rice varieties Madjitolngar and Tox-728-1 respectively, tested
under field conditions at Kelo. In this study, the two rice varieties have shown a dependency to endomycorrhizal symbiosis at Kelo, and therefore, an industrial-scale production of efficient
endomycorrhal inoculants is necessary to sustainably boost the productivity of
this important crop in Chad.