GT Biplot Analysis for Silage Potential, Nutritive Value, Gas and Methane Production of Stay-Green Grain Sorghum Shoots

Kaplan M. , Arslan M. , Kale H., Kara K. , Kokten K.

CIENCIA E INVESTIGACION AGRARIA, vol.44, pp.230-238, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44
  • Publication Date: 2017
  • Doi Number: 10.7764/rcia.v44i3.1802
  • Page Numbers: pp.230-238


M. Kaplan, M. Arslan, H. Kale, K. Kara, and K. Kokten. 2017. GT Biplot Analysis for
Silage Potential, Nutritive Value, Gas and Methane Production of Stay-Green Grain
Sorghum Shoots. Cien. Inv. Agr. 44(3): 230-238. This study was conducted to investigate
the possible silage of stay-green sorghum genotypes using GT biplot analysis. Following the
grain harvest, 41 sorghum genotypes were chopped to make silage. Biochemical analyses were
performed after 60 d of silage. The results revealed that green herbage yields varied between
13.40–65.96 t ha-1, pH between 3.92–4.25, dry matter ratios between 24.26–35.83%, crude
protein ratios between 3.44–7.03%, acid detergent fiber (ADF) ratios between 27.46-52.01%,
neutral detergent fiber (NDF) ratios between 40.80–69.12%, crude ash ratios between 5.89–
15.14%, lactic acid contents between 1.657–4.914%, and propionic acid contents between
0.000–0.247%. Methane production values varied between 14.15–21.80%, gas production
between 18.51–47.36 mL, metabolic energy (ME) between 6.68–11.67 MJ kg-1 DM, and
organic matter digestibility (OMD) between 47.20–89.93%. According to GT biplot analysis,
there were positive correlations among ADF, NDF and DM; among methane, ME, OMD and
gas-methane production; and among acetic, butyric and propionic acids, pH, ash and protein
contents. There were negative correlations among gas production, ADF, and NDF and among
herbage yield, crude protein, organic acids, pH and crude ash. Among the genotypes, Sugargraze
was prominent with herbage yield, while genotypes G4 and G3 were prominent with crude
protein. Considering all parameters, genotype G20 seemed to be the ideal genotype. Although
some silage samples had low silage and nutritional characteristics, others yielded values close
to or even higher than full sorghum silage. These varieties can constitute a quality roughage
source for livestock in winter. Further breeding research on stay-green genotypes may provide
significant contributions to plant and livestock production activities.