Evaluation of the nutritional divergence of the sugarcane (Saccharum spp.) varieties

Revista Brasileira de Zootecnia

Barbosa, Márcio Henrique Pereira³  Rennó, Francisco Palma³  Pereira, José Carlos³  Azevêdo, José Augusto Gomes¹  Fernandes, Alberto Magno²  Queiroz, Augusto César de³  Carneiro, Pedro Crescêncio Souza³ 

[1] Universidade Estadual de Santa Cruz;Universidade Estadual do Norte Fluminense Darcy Ribeiro;Universidade Federal de Viçosa

关键词: nutritional divergence;    principal components;    sugarcane    Introdução A cana-de-açúcar foi trazida para o Brasil pelos primeiros colonizadores;    sendo utilizada como recurso forrageiro na alimentação dos ruminantes (Peixoto;    1986);   

DOI  :  10.1590/S1516-35982003000600018

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this work was to evaluate the nutritional divergence of the sugarcane varieties, using the principal components analysis, to select three representative varieties of that divergence. The sugarcane varieties (Saccharum spp.) evaluated in this study were: RB855113, RB765418, RB855536, SP79-2233, RB845257, SP80-180, RB855453, RB855336, SP80-1842, SP81-1763, SP80-4445, SP79-1011, RB739359, RB867515 and SP80-3280, harvested at 426, 487 and 549 days post planting. Neutral detergent fiber (NDF), hemicellulose, lignin, undegradable NDF fraction and degradation rate of the potentially degradable NDF fraction were the evaluated discriminatory variables. Differences were observed for all the studied variables, except for the undegradable NDF fraction. The evaluation of the nutritional divergence of the sugarcane varieties based on the first three principal components, that explained 87.8% of the total variation. The NDF and the undegradable NDF fraction were the variables of smaller importance to explain the nutritional variability of the varieties. The SP80-1842 variety, harvested at 426 days post planting, and SP79-1011 variety, harvested at 549 days, were the ones that showed greater score dispersions for the first three principal components, being considered the most dissimilar, while the RB845257 variety, harvested at 487 days post planting, was located in the intermediary position between both. The principal components analysis was also efficient in selecting varieties with different harvesting times.

【 授权许可】

CC BY-NC