Evaluating the drought tolerance of three Brachiaria grass cultivar.

Fecha
2018-12
TĆ­tulo de la revista
ISSN de la revista
TĆ­tulo del volumen
Editor
Universidad EARTH
Resumen

The increasing effects of climate change threaten the livelihoods and wellbeing of many people by generating unfavorable environmental conditions, which lead to negative results in the development, growth and the production of many plant species. The objective of this experiment was to identify drought tolerant cultivars among the three studied Brachiaria species (B. brizantha CIAT 26110, B. ruziziensis x B. brizantha CIAT 36061 and B. ruziziensis x decumbens cv) using controlled water irrigation. The evaluation consisted of three treatments based on water availability levels, where treatment W50 had adequate amount of water, treatment W30 had moderate amount of water and treatment W10 had a low amount of water. The collected data was water potential (WP) in bars, above ground biomass (AGB) in grams, below ground biomass (BGB) in grams and total biomass (TB) in grams. Statistical analysis was conducted for each cultivar across treatments using analysis of variance in Software R. In the water deficit treatment of below ground biomass, species B. brizantha CIAT 26110 and B. ruziziensis x B. brizantha CIAT 36061 had similar growth while B. ruziziensis x decumbens cv had experienced water stress and gained less below ground biomass. In above ground biomass, all the three species had statistically similar growth. However, species B. brizantha CIAT 26110 and B. ruziziensis x B. brizantha CIAT 36061 demonstrated morphological and physiological drought tolerance potential and are recommended for use as animal feed during dry seasons to reduce shortfalls in animal forage availability and ensure rural farmer livelihoods in Africa.


Los efectos crecientes del cambio climĆ”tico amenazan la vida de muchas especies y ponen a muchas otras en condiciones ambientales desfavorables, generando resultados negativos en el desarrollo, el crecimiento y la producciĆ³n de diversas especies de plantas. Este experimento se llevĆ³ a cabo para evaluar la tolerancia a la sequĆ­a de tres cultivares de pastos Brachiaria y para esto se desarrollĆ³ en un ambiente controlado. El objetivo de este experimento fue identificar cultivares tolerantes a la sequĆ­a entre las tres especies de B.rachiaria estudiadas (B. brizantha CIAT 26110, B. ruziziensis x B. brizantha CIAT 36061 y B. ruziziensis x decumbens cv). La evaluaciĆ³n consiste en tres tratamientos basados en niveles de disponibilidad de agua. Se recopilĆ³ datos sobre el potencial hĆ­drico (WP), biomasa aĆ©rea (AGB), biomasa subterrĆ”nea (BGB) y biomasa total (TB). El anĆ”lisis estadĆ­stico se realizĆ³ mediante el anĆ”lisis de varianza utilizando el Software R. En el tratamiento del dĆ©ficit hĆ­drico de la biomasa subterrĆ”nea, las especies B. brizantha CIAT 26110 y B. ruziziensis x B. brizantha CIAT 36061 obtuvieron un crecimiento similar mientras que B. ruziziensis x decumbens cv experimentĆ³ estrĆ©s hĆ­drico y ganĆ³ menos biomasa subterrĆ”nea. En la biomasa aĆ©rea, las tres especies tuvieron ganancias estadĆ­sticamente similares. Sin embargo, segĆŗn el estudio, dos especies, B. brizantha CIAT 26110 y B. ruziziensis x B. brizantha CIAT 36061, demostraron un potencial morfolĆ³gico y fisiolĆ³gico de tolerancia a la sequĆ­a y son recomendables para sembrar como pastos para animales durante las estaciones secas.

DescripciĆ³n
Palabras clave
BRACHIARIA, RESISTENCIA A LA SEQUIA, POTENCIAL HIDRICO DEL SUELO, BIOMASA
CitaciĆ³n