Tham khảo tài liệu 'waste water treatment and reutilization 2011 part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Waste-Water Use in Energy Crops Production 367 Jerusalem artichoke trial Materials y methods Two cultivars of Jerusalem artichoke were tryed red tubers R and white tubers W and two kinds of waters were used for irrigation urban waste water UWW an ground water GW . Photo 6. Tubers of the two Jerusalem artichoke cultivars tryed in this experience. R with red tubers in the left and W with white tubers in the right. The experimental test had a random plot design with 3 repetitions per treatment each combination of cultivar and kind of water . The planting density was 25 000 plantas hectares m between rows and m between plants in the row. The tubers seed weight was around 50 g and planting depth was 10 cm. It was carried out manual weed control and we did weekly irrigations with 22 mm of water 35 applications in total 767 mm . We harvested individual crop plants and in each one the following parameters were determined Performance of tubers per plant kg Number of tubers per plant Height m Number of main stems Performance of dry biomass kg . On a sample of biomass combustion heat was determined with a calorimeter bomb. In laboratory we estimated the potential to produce bioethanol from tubers taking into account the following relationship for each kg of fermentable carbohydrates l of ethanol is obtained4. Results Jerusalem artichoke tuber yield showed differences between type of water treatment being 177 750 kg hectares in UWW and 144 000 kg hectares in GW. 4 http biofuel_library ethanol_motherearth 368 Waste Water - Treatment and Reutilization Varieties UWW GW R 206 250 154 000 W 149 500 134 250 Average 177 750 144 000 Table 3. Tuber yield per hectare kg for each irrigation treatment ground water GW and urban waste water UWW and for two varieties R and W . In both varieties yield was higher when UWW was used for irrigation. R had higher yield than W variety. Yields in this trial were bigger than those got in
