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.

本压缩包包含2015至2020年（共6年）于美国阿拉巴马州黑德兰市韦尔格拉斯研究与推广中心（Wiregrass Research and Extension Center）开展的黑麦生物量产量试验所用代码与数据集。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个播种量（67 kg·ha⁻¹与101 kg·ha⁻¹）及4个施氮量（0、34、67、101 kg·ha⁻¹），各处理重复4次，每年共计128组观测数据。本数据集涵盖实测及/或计算得到的多项指标：生物量、植株全碳与全氮含量、碳氮比（C:N ratio）、氮素吸收量，以及生物量相关成本信息。此外，数据集还包含2015、2017、2019三年的花生产量数据，以及2016、2020两年的棉花产量数据；2018年因飓风灾害未采集棉花相关数据。针对67 kg·ha⁻¹播种量处理下的0与101 kg·ha⁻¹施氮水平，同步测定了初始及最终土壤全碳含量。