Identification of a superior dual purpose maize hybrid among widely grown hybrids in South Asia and value addition to its stover through feed supplementation and feed processing uri icon

abstract

  • Six maize hybrids (HPQM-1, HY-TEC 5101, Pinnacle, 30V 92,900 M Gold and NK 6240) commonly grown in South Asia were analyzed for grain yields, stover yields and stover fodder quality traits by a range of agronomic, morphological, laboratory and animal experimental trials. Significant differences were found among the six hybrids in grain and stover yield and stover N, NDF, ADF, ADL, IVOMD and ME content and, when fed to sheep, significant differences were observed for stover intakes and nitrogen retentions. Laboratory traits related to stover structural carbohydrates such as NDF and ADF were highly negatively related with digestible organic matter intake (DOMI) accounting for 90% of the variation therein, while IVOMD and ME were positively associated with DOMI accounting for 90 and 94% of the variation therein, respectively. Stover from two hybrids (NK 6240, 30V 92) with the highest and second highest grain yield but with the laboratory and in vivo stover fodder quality traits falling into the statistically highest and lowest category were further investigated for animal responses through supplementation and feed processing. From these two stovers, complete diet in the form of feed block and mash were designed consisting of 60% stover. Stover-based complete diets in the form of feed mash were superior to diets offered as feed blocks. In the feed mash form, animals fed the superior stover-based diet had more than 30% greater average daily gain than those fed the lower quality stover-based feed mash diet. Stover from the popular maize hybrids were found to differ significantly with regard to the stover quality attributes-feed intake, digestibility and animal performance suggesting the possibility of exploiting these attributes by the maize breeders for developing promising dual purpose maize varieties. (C) 2012 Elsevier B.V. All rights reserved.

publication date

  • 2013
  • 2013
  • 2013