00/02961 Local policies for DSM: the UK's home energy conservation act
- Publisher
- Elsevier Science
- Year
- 2000
- Weight
- 211 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0140-6701
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✦ Synopsis
15 Environment (pollution, health protection, safety) be due to increased root biomass rather than increased carbon concentration. Root weight density generally decreased in the interrow with wider row width and nitrogen application generally did not affect root weight density. Root weight density in the Pacolet soil was higher than in the other four soils and root density was 4.1 tnnes higher in the Pacolet soil than in the Norfolk soil. Root mass in the Pacolet soil (36 327 kg ha ') was 2.7 times greater than that found in the Norfolk soil (I3 204 kg ha ') within 150 cm of the soil surface. Differences in root characteristics were found among cultivars: root weight density with 'Cave-in-Rock' switchgrass was 29.4 and 47.6% higher than 'Alamo' and 'Kanlow', respectively. Variations in switchgrass root biomass production owing to soil type and cultivar suggest that site and cultivar selection will be important determinants of C sequestration by switchgrass roofs. A potential benefit of switchgrass is the reduced loss of nutrients associated with non-point pollution, owing to its deep root system that may extend 330 cm below the soil surface.