Carbon Crops Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network and Resilient Economic Agricultural Practices in Morris, Minnesota

Carbon Crops Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network and Resilient Economic Agricultural Practices in Morris, Minnesota
The overall goal of the Carbon Crop study, established in 2000, was to assess strategies for increasing soil C sequestration including converting to no till systems and including perennial grasses (e.g., switchgrass and big bluestem) Overall, the goal of the study has remained constant, although individual treatments were changed after an incremental soil sampling, in response to new hypotheses and questions. Soil sampling is conducted as treatment changes are implemented. In 2012, two of the perennial grass systems (spring harvest of Switchgrass and Big Bluestem) were changed to corn/soybean rotations, beginning with a soybean entry point, to determine if the SOC accrued under the perennial system was lost by converting to a short annual rotation managed without tillage. The second change made was to compare the productivity between recent and traditional switchgrass cultivars. The final change was conversion of autumn harvest of Big Bluestem treatment replaced with an annual biomass crop – Sorghum-Sudan grass. Soil samples were taken to 1 m in 2000, 2006, 2011, and 2016. Nitrous oxide and carbon dioxide fluxes from the soil were measured from June 2009 through March 2012. Resources in this dataset:Resource Title: GeoData catalog record. File Name: Web Page, url: https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/21d6ff3b-de69-44ff-a2b6-980a9c972a35

自2000年设立的碳汇作物研究旨在评估提升土壤碳储存的策略，包括转向免耕系统及引入多年生草本植物（如芒草和蓝茎草）。总体而言，研究目标始终保持一致，尽管在逐步土壤采样及响应新的假设和问题后，个别处理方式有所变更。土壤采样随处理方式实施而进行。2012年，对两种多年生草本系统（芒草和蓝茎草的春季收割）进行了调整，转变为玉米/大豆轮作，以大豆作为起始点，旨在确定在多年生系统下累积的土壤有机碳（SOC）在转变为无耕作的一年生轮作后是否丧失。第二个变更是对近期与传统芒草品种之间的生产力进行比较。最后的变更是将蓝茎草的秋季收割处理替换为一年生生物质作物——高粱-苏丹草。2000年、2006年、2011年和2016年进行了1米的土壤采样。从2009年6月至2012年3月，测量了土壤中的氧化亚氮和二氧化碳通量。本数据集包含的资源：资源标题：GeoData目录记录。文件名：网页，网址：https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/21d6ff3b-de69-44ff-a2b6-980a9c972a35