As with the supply of feed for livestock, where well managed Aber HSG leys are the cheapest source of nutrition for meat and milk production, Aber HSG offers great potential for biogas production.
|5.00||AberEcho||Hybrid ryegrass (T)|
|4.00||AberClyde||Perennial ryegrass (T)|
Studies carried out at Germinal Horizon Aberystwyth show that Aber HSG ryegrasses perform well compared to general grassland mixtures.
All the Aber HSG varieties outperformed mixed grassland with the conclusion that higher water-soluble carbohydrate (sugar) content in grass has a positive effect on both the yield and rate at which biogas is produced.
To help answer outstanding questions, Germinal is setting up further research at Germinal Horizon Aberystwyth comparing Aber HSG varieties with alternative feedstocks that have a range of D-values and at varying harvest dates.
Aber High Sugar Grass varieties that have been bred for higher water-soluble carbohydrate content and rank high for D-value offer the ideal combination of characteristics for an AD feedstock, whether ensiled.
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|Sowing rate||34.5 kg/ha (14 kg/acre)|
|Sowing time||March/April or August/September|
|Sowing depth||15 mm (1/2 inch) or broadcast|
|Sowing instructions||Drill into a fine tilth
Moist and warm soil conditions (minimum 5˚C)
Roll before and after drilling for good soil-to-seed contact