Assessment of nutritive value, gas and methane production, fermentation of ensiled mixtures of sorghum–cluster bean

Figures & data

Table 1. Chemical composition and CT content of silages.

Item	Silages
	SS100	S75CB25	S50CB50	S25CB75	CB100	Sig	LSD
DM, %	30.63^a	27.71^b	26.64^c	23.44^d	22.24^e	**	0.93
ADF, % DM	38.70^a	37.04^b	33.16^c	33.01^c	31.75^d	**	0.72
NDF, % DM	54.82^a	54.45^ab	53.80^b	48.82^c	46.24^d	**	0.93
EE, % DM	1.19^c	1.22^c	1.41^b	1.47^b	2.21^a	**	0.10
CA, % DM	6.43^d	6.56^d	8.70^c	9.33^b	10.71^a	**	0.56
CP, % DM	9.27^e	10.37^d	11.57^c	12.19^b	14.18^a	**	0.51
CT, % DM	0.56^e	0.88^d	1.31^c	1.85^b	2.74^a	**	0.12

DM: dry matter (%); ADF: acid detergent fibre (%); NDF: neutral detergent fibre (%); CP: crude protein (%); CO: crude oil (%); CA: crude ash (%); CT: condense tannin (%); **: p < 0.01.

The small script letters in same column show statistically significance (p ≤ 0.01).

Figure 1. Variation of nutritional traits of sorghum and cluster bean mixture silages.

Figure 2. Fermentation traits of sorghum and cluster bean mixture silages. ETOH: etil alcohol, PA: propionic acid, AA: acetic acid, LA: lactic acid, BA: butyric acid, WSC: water-soluble carbohydrate.

Table 2. Fermentation profiles and Fleig scores of silages.

Item	Silages
	SS	S75CB25	S50CB50	S25CB75	CB	Sig	LSD
pH	4.05^d	4.27^c	4.29^c	4.69^b	5.30^a	**	0.03
Lactic acid %	6.16^a	3.20^b	1.94^c	1.15^d	0.88^e	**	0.19
Acetic acid %	2.64^e	3.02^d	3.55^c	4.15^b	6.64^a	**	0.33
Propionic acid %	0.91^a	0.84^b	0.54^c	0.39^d	0.26^e	**	0.04
Butyric acid %	0.00^d	1.55^c	1.81^c	4.88^b	5.30^a	**	0.25
Ethanol %	5.62^e	7.21^d	8.83^c	9.47^b	10.43^a	**	0.59
residual WSC %	1.00^e	2.32^d	5.49^c	6.90^b	8.47^a	**	0.61
Fleig score	104.26^a	89.61^b	86.56^c	64.41^d	37.60^e	**	2.07

WSC: water-soluble carbohydrate **: p < 0.01.

The small script letters in same column show statistically significance (p ≤ 0.01).

Figure 3. The GP, methane production, IVOMD, ME and NEL of sorghum and cluster bean mixture silages. CH4: methane, ME: metabolizable energy, NEL: net energy lactation.

Table 3. The GP, methane production, ME, NEL, and IVOMD of silages.

Items	Silages
	SS	S75CB25	S50CB50	S25CB75	CB	Sig	LSD
GP (ml)	46.34^a	45.72^a	40.49^b	26.75^c	25.62^d	**	0.81
CH4 (ml)	8.78^a	8.83^a	7.84^b	4.38^c	3.62^d	**	0.60
ME (MJ/kg DM)	8.56^a	8.48^a	7.77^b	5.73^d	5.92^c	**	0.12
NEL (MJ/kg DM)	5.00^a	4.94^a	4.33^b	2.60^d	2.77^c	**	0.10
IVOMD (%)	64.53^a	64.55^a	61.87^a	47.70^c	52.17^b	**	2.79

GP: gas production (ml); CH₄: methane production (ml); ME: metabolizable energy (MJ/kg DM); NEL: net energy lactation (MJ/kg DM); OMD: organic matter digestibility (%); **: p < 0.01.

The small script letters in same column show statistically significance (p ≤ 0.01).