Clash of the Titans: Comparing Productivity Via Radiation Use Efficiency for Two Grass Giants of the Biofuel Field
Clash of the Titans: Comparing Productivity Via Radiation Use Efficiency for Two Grass Giants of the Biofuel Field
复制标题
泰坦的冲突：通过辐射利用效率比较生物燃料领域两个草巨人的生产力
作者：
J. Kiniry;Mari;S. B. Bruckerhoff;J. Kaiser;R. Cordsiemon;R. Daren Harmel
柳枝稷（Panicum virgatum L.）而芒属植物（Miscanthus × Lactaceus）对生物燃料工业至关重要。辐射利用效率（芸香）是在土壤水分和养分不受限制的环境中得出的，它提供了一个衡量相对生产力的指标。本研究的目的是比较大芒柳枝稷品种，使用既定的方法来计算两个物种在两个不同的网站的芸香。在密苏里州Elsberry（芒草和柳枝稷品种Alamo、Kanlow和Cave in Rock）和德克萨斯州古斯丁（芒草和Alamo柳枝稷，用乳制品废水灌溉和非灌溉对照）的地块上，对截获的光合有效辐射（PAR）和干物质的分数进行了测量。在MO，芒草的平均芸香（3.71）小于阿拉莫柳枝稷的平均芸香（4.30）。在TX灌溉下，芒草平均芸香为2.24，阿拉莫柳枝稷平均芸香为3.20。在密苏里州，北方低地柳枝稷品种Kanlow表现出与芒草相似的平均芸香（3.70）。在密苏里州，北方高地栽培品种岩洞的平均芸香（3.17），只有85%的芒在密苏里州。在德克萨斯州，胁迫（水和养分）对芒草RUE的影响大于对柳枝稷芸香的影响。这些结果为模拟这些重要的生物燃料草在不同的环境条件下提供了现实的芸香值。
The comparative productivity of switchgrass (Panicum virgatum L.) and Miscanthus (Miscanthus × giganteus) is of critical importance to the biofuel industry. The radiation use efficiency (RUE), when derived in an environment with non-limiting soil water and soil nutrients, provides one metric of relative productivity. The objective of this study was to compare giant Miscanthus to available switchgrass cultivars, using established methods to calculate RUE of the two species at two disparate sites. Measurements of fraction intercepted photosynthetically active radiation (PAR) and dry matter were taken on plots at Elsberry, MO (Miscanthus and the switchgrass cultivars Alamo, Kanlow, and Cave-in-Rock) and at Gustine, TX (Miscanthus and Alamo switchgrass, irrigated with dairy wastewater and a non-irrigated control). In MO, Miscanthus mean RUE (3.71) was less than Alamo switchgrass mean RUE (4.30). In TX under irrigation, Miscanthus mean RUE was 2.24 and Alamo switchgrass mean RUE was 3.20. In MO, the more northern lowland switchgrass cultivar, Kanlow, showed similar mean RUE (3.70) as Miscanthus. In MO, the northern upland cultivar Cave-in-Rock had a mean RUE (3.17) that was only 85% of that for Miscanthus at MO. Stress (water and nutrients) had a greater effect on Miscanthus RUE than on switchgrass RUE in TX. These results provide realistic RUE values for simulating these important biofuel grasses in diverse environmental conditions.