Evaluation of corn cultivars harvested at two cutting heights for ensilage

Revista Brasileira de Zootecnia

Hamilton Caetano²  Mauro Dal Secco De Oliveira¹  José Esler De Freitas Júnior¹  Aníbal Coutinho Do Rêgo¹  Francisco Palma Rennó¹  Marina Vieira De Carvalho¹ 

[1] ,Universidade Estadual Paulista FMVA Departamento de Medicina VeterináriaAraçatuba SP

关键词: digestibility;    neutral detergent fiber;    plant fractions;    productivity;    plant fractions;    water soluble carbohydrates;    carboidratos solúveis;    digestibilidade;    fibra em detergente neutro;    frações da planta;    poder tampão;    produtividade;   

DOI  :  10.1590/S1516-35982011000100003

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate the agronomic characteristics, bromatological-chemical composition and digestibility of 11 corn cultivars (Zea mays) harvested at two cutting heights. Cultivars D 766, D 657, D 1000, P 3021, P 3041, C 805, C 333, AG 5011, FO 01, CO 9621 and BR 205 were evaluated when they were harvested 5 cm above ground (low) and 5 cm below the insertion of the first ear (high). The experiment was designed as random blocks, with three replicates, arranged in an 11 x 2 factorial scheme. Cultivars presented similar productions of forage dry matter and grains. Percentages of stalk, leaf, straw, cob and kernel fractions were different among cultivars, as well as dry matter content of the whole plant at harvest. Considering the whole plant, only the contents of gross energy, nitrogen in neutral detergent fiber, and in vitro neutral and acid detergent fiber digestibility did not differ among cultivars. Increase on the cutting height improved forage quality due to the reduction of stalk and leaf fractions and contents of cell wall constituents.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License