Bibliographic citations
Llacsa, J., (2022). Utilización de paja proveniente de mutantes de cebada (Hordeum vulgare) en la alimentación de vacunos en la sierra de Perú [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/5626
Llacsa, J., Utilización de paja proveniente de mutantes de cebada (Hordeum vulgare) en la alimentación de vacunos en la sierra de Perú []. PE: Universidad Nacional Agraria La Molina; 2022. https://hdl.handle.net/20.500.12996/5626
@phdthesis{renati/244076,
title = "Utilización de paja proveniente de mutantes de cebada (Hordeum vulgare) en la alimentación de vacunos en la sierra de Perú",
author = "Llacsa Mamani, Javier",
publisher = "Universidad Nacional Agraria La Molina",
year = "2022"
}
The objective of the present work was the evaluation of the productive performance, nutritional value and use of the straw from the cultivation of barley mutants in the feeding of cattle in high Andean areas. The research was carried out in two localities of the central highlands (IRD-Sierra UNA-La Molina and Sincos district, Junín). Its execution was carried out in three experimental stages; a) Productive yield (grain and straw expressed in kg/ha, respectively) and nutritional value of straw (kg protein/ha, in vitro digestibility of organic matter and neutral detergent fiber) were evaluated in 25 barley genotypes. The genotype that showed the highest grain yield was UNALM96M6h-617, followed by UNALM96M6h-748, UNALM96M6h-729 and UNALM96M6h-326. Additionally, the genotype with the best quality showed UNALM96M6h-615, followed by UNALM96M6h-617 and UNALM96M6h-588. There is no relationship between grain yield and barley straw of the mutant lines. From these results, the best mutants were identified: UNALM96M6h-617 and UNALM96M6h-326, based on the ranking of the highest number of desirable characters. b) The agronomic performance and nutritional value of two selected dual-purpose barley genotypes (UNALM96M6h-617 and UNALM96M6h-326) were evaluated. For this work, sowing was carried out in demonstrative plots and contrasted with the local variety, where the characteristics of biomass yield and nutritional value were evaluated. According to the results of the chemical composition, the UNALM96M6h-326 genotype has higher protein (5.38%), DIVMO (51.87%) and FDN (50.00%), values that allow us to say that the barley straw is not totally low in quality. c) The impact of barley straw supplementation on the productive performance of cattle fed with natural pastures was evaluated. The trial with cattle, fed with improved barley straw (UNALM96M6h-326) and cattle fed with straw of the local variety, grazing in the dry season, had a production of 4.0 and 3.5 kg of milk/cow/day (p< 0.01), respectively, with a difference between treatments. It is concluded that the UNALM96M6h-326 genotype is a dual-purpose genotype with a superior productive alternative and its use of barley straw had an increase of o.5 Kg/day of milk compared to the straw of the local variety.
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