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Agronomic performance of the lignocellulosic feedstock crop energy cane in the Texas Rolling Plains
Agronomy Journal ( IF 2.1 ) Pub Date : 2020-07-20 , DOI: 10.1002/agj2.20370
Pramod Pokhrel 1 , Nithya Rajan 1 , John Jifon 2 , William Rooney 1 , Russell Jessup 1 , Jorge da Silva 2 , Juan Enciso 2 , Ahmed Attia 3
Affiliation  

Feedstock genetics and environment are important factors determining biomass yield of biofuel crops. Field studies were conducted to evaluate agronomic performance of four energy cane (Saccharum spp. hybrid) genotypes (TUS11‐62, TUS11‐58, TCP10‐4928, and Ho 02‐113) in the Texas Rolling Plains. In the first study, cane billets were planted in 2015 and data were collected from first (2016) and second (2017) ratoons. A second study was planted in 2016 and data were collected the same year from plant cane. Data collected include biomass, stalk height, stalk population, leaf area index (LAI), and normalized difference vegetation index (NDVI). Biomass yield of ratoons was not significantly different (p > .05) among genotypes. However, TUS11‐58 had the highest plant cane yield. The average biomass yield of plant cane, first, and second ratoons were 20.2, 40.4, and 26.4 t ha−1 respectively. Longer growing period of ratoon (∼8 mo) compared to plant cane (∼5.5 mo) increased biomass. However, low temperatures (−14 to −16 °C) during the dormant phase resulted in lower yield of the second ratoon. Among genotypes, TUS11‐62 had taller stalks, but was cold sensitive. Genotype TCP10‐4928 had higher stalk population and LAI. An exponential relationship was observed between LAI and NDVI (R2 = .67). Overall, there were differences in growth characteristics of energy cane genotypes, however biomass yield was similar in the ratoon phase. The results of this study showed that low temperature tolerance and growing season duration are key factors in determining biomass yield in higher latitude regions such as the Texas Rolling Plains.

中文翻译:

德克萨斯州滚动平原的木质纤维素原料作物能量棒的农艺表现

原料遗传学和环境是决定生物燃料作物生物量产量的重要因素。进行了实地调查,以评估四个能源甘蔗(农业性能的甘蔗在德州平原滚动属混合型)基因型(TUS11-62,TUS11-58,TCP10-4928,和何02-113)。在第一个研究中,2015年种植了甘蔗钢坯,并从第一(2016)和第二(2017)再生棉收集数据。2016年进行了第二项研究,同年从植物蔗中收集了数据。收集的数据包括生物量,茎秆高度,茎秆种群,叶面积指数(LAI)和归一化植被指数(NDVI)。再生棉的生物量产量无显着差异(p > .05)。但是,TUS11-58的植物蔗产量最高。甘蔗,第一和第二再生棉的平均生物量产量分别为20.2、40.4和26.4 t ha -1。与植物甘蔗(〜5.5 mo)相比,再生子的较长生长期(〜8 mo)增加了生物量。但是,休眠期的低温(−14至-16°C)导致第二个再生区的产量降低。在基因型中,TUS11-62具有较高的茎,但对感冒敏感。基因型TCP10-4928具有较高的茎秆种群和LAI。LAI与NDVI(R 2 = .67)。总体而言,能量甘蔗基因型的生长特性存在差异,但是再生期的生物量产量相似。这项研究的结果表明,低温耐受性和生长季节持续时间是确定高纬度地区(例如德克萨斯州滚动平原)生物量产量的关键因素。
更新日期:2020-07-20
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