Greenhouse Gas Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network in Bowling Green, Kentucky

Greenhouse Gas Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network in Bowling Green, Kentucky
Alternative N fertilizers that produce low greenhouse gas (GHG) emissions from soil are needed to reduce the impacts of agricultural practices on global warming potential (GWP). We quantified and compared growing season fluxes of N2O, CH4, and CO2resulting from applications of different N fertilizer sources, urea (U), urea-ammonium nitrate (UAN), ammonium nitrate (NH4 NO3), poultry litter, and commercially available, enhanced-efficiency N fertilizers as follows: polymer-coated urea (ESN), SuperU, UAN + AgrotainPlus, and poultry litter + AgrotainPlus in a no-till corn (Zea maysL.) production system. Greenhouse gas fluxes were measured during two growing seasons using static, vented chambers. The ESN delayed the N2O flux peak by 3 to 4 wk compared with other N sources. No significant differences were observed in N2O emissions among the enhanced-efficiency and traditional inorganic N sources, except for ESN in 2009. Cumulative growing season N2O emission from poultry litter was significantly greater than from inorganic N sources. The N2O loss (2-yr average) as a percentage of N applied ranged from 0.69% for SuperU to 4.5% for poultry litter. The CH4–C and CO2–C emissions were impacted by environmental factors, such as temperature and moisture, more than the N source. There was no significant difference in corn yield among all N sources in both years. Site specifics and climate conditions may be responsible for the differences among the results of this study and some of the previously published studies. Our results demonstrate that N fertilizer source and climate conditions need conideration when selecting N sources to reduce GHG emissions. Resources in this dataset:Resource Title: Bowling Green, KY Greenhouse Gas Study (KYBGGHG) CSV data. File Name: KYBGGHG_csv_data.zipResource Description: CSV format data on Experimental Units, Field Sites, Greenhouse Gas Flux, Harvest Fraction, Nutrient Efficiency, Soil Chemistry, Soil Physics, Amendments, Planting, Persons, Treatments, Weather Daily, Weather Station.

为降低农业生产对全球变暖潜势（GWP）的影响，亟需开发产生低温室气体（GHG）排放的替代氮肥。本研究旨在量化并比较不同氮肥来源（尿素（U）、尿素-硝酸铵（UAN）、硝酸铵（NH4NO3）、禽畜粪便以及商业化的高效氮肥，如聚合物包覆尿素（ESN）、SuperU、UAN + AgrotainPlus、禽畜粪便 + AgrotainPlus）在免耕玉米（Zea maysL.）生产系统中生长季内N2O、CH4和CO2通量的变化。温室气体通量在两个生长季节内通过静态、通风的气室进行测量。与其它氮肥来源相比，ESN延迟了N2O通量峰值3至4周。在增强型与传统无机氮源之间，N2O排放量没有显著差异，仅在2009年的ESN中观察到。禽畜粪便的累积生长季N2O排放量显著高于无机氮源。氮肥损失（2年平均值）占施用氮量的百分比范围从SuperU的0.69%至禽畜粪便的4.5%。CH4-C和CO2-C的排放量受环境因素（如温度和湿度）的影响大于氮肥来源。在两年中，所有氮肥来源的玉米产量之间均无显著差异。研究结果的差异可能归因于场地特性和气候条件，与先前发表的一些研究存在差异。本研究结果表明，在选择氮肥以降低温室气体排放时，需考虑氮肥来源和气候条件。本数据集包含的资源：资源标题：肯塔基州波尔丁格林温室气体研究（KYBGGHG），CSV数据。文件名：KYBGGHG_csv_data.zip，资源描述：实验单元、田间地点、温室气体通量、收获比例、养分效率、土壤化学、土壤物理、改良剂、种植、人员、处理、每日天气、气象站等数据。