英文文献：Carbon Footprint: A New Farm Management Consideration in the Southern High Plains-碳足迹:南方高原地区新的农业管理考虑
英文文献作者：Weinheimer, Justin,Rajan, Nithya,Johnson, Phillip N.,Maas, Stephan
英文文献摘要：
As concerns continue to mount regarding man induced impacts to the global climate, the SHPT region could be faced with a unique scenario in which the net carbon balance should be considered in the producer’s enterprise selection and production systems. Currently, the SHPT produces nearly one third of the U.S. cotton crop. Under a potential cap and trade system the challenge for the agricultural industry in the SHPT may be how to sustain the region’s economic base and production capabilities. Thus, the objective of this study was to measure the net carbon relationships between irrigated cotton and irrigated corn production systems on the SHPT using data from the Texas Alliance for Water Conservation (TAWC, 2009). Due to the unique management and production challenges in the SHPT, additional comparisons were made regarding economic viability and irrigation efficiency. Within the parameters of this study, it is apparent that irrigated corn has an advantage over cotton in both its ability to return carbon to the soil, maintain profitability, and use water resources efficiently. If the agricultural industry is included in CO2 regulation, it would appear that irrigated agricultural producers in the SHPT who have the ability to move between irrigated cotton and corn should be aware of the advantages corn possesses. However, even under changing commodity prices and profitability scenarios, corn still presents a significant advantage over cotton in its ability to reduce atmospheric CO2 by depositing larger amounts of biomass carbon into the soil.

由于对人为因素对全球气候的影响的关注继续增加，SHPT地区可能面临一种独特的情况，即在生产者的企业选择和生产系统中应考虑净碳平衡。目前，SHPT生产美国近三分之一的棉花。在一个潜在的限额和交易制度下，SHPT农业产业面临的挑战可能是如何维持该地区的经济基础和生产能力。因此，本研究的目的是利用德克萨斯水资源保护联盟(TAWC, 2009)的数据，测量SHPT上灌溉棉花和灌溉玉米生产系统之间的净碳关系。由于SHPT独特的管理和生产挑战，在经济可行性和灌溉效率方面进行了额外的比较。在本研究的参数范围内，很明显，灌溉玉米在向土壤中返还碳、维持盈利和有效利用水资源方面都比棉花有优势。如果农业产业被包括在CO2法规中，那么在SHPT中有能力在灌溉棉花和玉米之间移动的灌溉农业生产者应该意识到玉米所具有的优势。然而，即使在商品价格和盈利能力不断变化的情况下，玉米仍然比棉花具有显著的优势，因为它能够通过向土壤中沉积大量的生物质碳来减少大气中的二氧化碳。