Rye planting date impacts biomass production more than seeding rate and nitrogen fertilizer

This zipped folder contains the code and datasets used for an experiment conducted over six years (2015–2020) at the Wiregrass Research and Extension Center in Headland, AL to examine rye biomass production. Treatments included four planting dates (late October, early November, late November, and early December), two seeding rates ( 67 and 101 kg ha-1), and four nitrogen rates (0, 34, 67, and 101 kg ha-1) replicated four times for a total of 128 observations each year. Measured and/or calculated variables from the data set included biomass, total C and N concentrations for the plant material, C:N ratio, N uptake values, as well as cost info for the biomass. In addition, there are three years of peanut yield data (2015, 2017, 2019) and only two years of cotton yield data (2016, 2020).  No cotton data was collected for 2018 due to hurricane damage.  Initial and final soil total C values were also measured across the 0 and 101 kg N ha-1 rates for the 67 kg ha-1 seeding rate. Â

本压缩包包含2015至2020年期间，在美国阿拉巴马州海德兰市的Wiregrass农业研究与推广中心（Wiregrass Research and Extension Center）开展的一项黑麦生物量生产试验所使用的代码与数据集。试验设置4个播期（10月下旬、11月上旬、11月下旬、12月上旬）、2个播种密度（67与101 kg·ha⁻¹）以及4个施氮水平（0、34、67与101 kg·ha⁻¹），每个处理重复4次，每年共计128组观测数据。本数据集包含测定或计算得到的多项指标：生物量、植物材料的全碳与全氮含量、碳氮比（C:N）、氮素吸收量，以及生物量相关成本信息。此外，数据集还包含3个年度的花生产量数据（2015、2017、2019年）以及2个年度的棉花产量数据（2016、2020年）；2018年因飓风灾害未采集棉花产量数据。针对67 kg·ha⁻¹的播种密度处理，本数据集同时测定了0与101 kg·ha⁻¹施氮水平下的初始与最终土壤全碳含量。