Hunter Mitchell C, Kemanian Armen R, Mortensen David A
American Farmland Trust, 411 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN 55108, United States.
116 Agricultural Sciences and Industries Building, The Pennsylvania State University, University Park, PA 16802, United States.
Data Brief. 2021 Feb 9;35:106856. doi: 10.1016/j.dib.2021.106856. eCollection 2021 Apr.
This dataset supports the research paper "Cover crop effects on maize drought stress and yield" by Hunter et al. [1]. Data is provided on ecophysiological and yield measurements of maize grown following five functionally diverse cover crop treatments. The experiment was conducted in Pennsylvania, USA from 2013-2015 with organic management. Cover crops were planted in August after winter wheat harvest. Cover crops were terminated in late May of the following year, manure was applied, and both were incorporated with full inversion tillage prior to planting maize. The five cover crop treatments included a tilled fallow control, medium red clover, cereal rye, forage radish, and a 3-species mixture of medium red clover, cereal rye, and Austrian winter pea. Drought was imposed with rain exclusion shelters starting in early July. Results are provided for two subplots per cover crop treatment representing ambient and drought conditions. The dataset includes: 1) soil moisture in spring and during the maize growing season; 2) maize height, leaf chlorophyll content, leaf area index, stomatal conductance, and pre-dawn leaf xylem water potential; 3) maize yield and yield components including kernel biomass, total biomass, harvest index, number of plants per subplot, ears per plant, kernel mass, and kernel number per ear, per plant, and per subplot; 4) modeled season-long radiation interception and radiation use efficiency of biomass production; and 5) maize rooting density by depth in one year only. Data was collected in the field and lab using ecophysiological instruments (e.g., SPAD meter, ceptometer, porometer, and pressure chamber). Biomass samples were taken to determine yield. Data presented have been averaged to the subplot level (ambient and drought). This dataset can inform future research focused on using cover crops and other cultural practices to improve climate adaptation in cropping systems and also may be useful for meta-analyses.
该数据集支持Hunter等人[1]发表的研究论文《覆盖作物对玉米干旱胁迫及产量的影响》。提供了在五种功能各异的覆盖作物处理后种植的玉米的生态生理和产量测量数据。该实验于2013年至2015年在美国宾夕法尼亚州采用有机管理方式进行。覆盖作物在冬小麦收获后的8月种植。次年5月下旬终止覆盖作物生长，施入粪肥，并在种植玉米前通过全翻耕将两者翻入土中。五种覆盖作物处理包括翻耕休闲对照、中红三叶草、谷物黑麦、饲用萝卜，以及中红三叶草、谷物黑麦和奥地利冬豌豆的三物种混合物。从7月初开始使用防雨棚施加干旱胁迫。针对每种覆盖作物处理的两个子地块提供了代表环境和干旱条件的结果。该数据集包括：1）春季和玉米生长季节的土壤湿度；2）玉米株高、叶片叶绿素含量、叶面积指数、气孔导度和黎明前叶片木质部水势；3）玉米产量及产量构成要素，包括籽粒生物量、总生物量、收获指数、每个子地块的植株数、单株穗数、籽粒质量以及每穗、每株和每个子地块的籽粒数；4）模拟的整个生长季辐射截获量和生物量生产的辐射利用效率；5）仅一年中按深度划分的玉米生根密度。数据是在田间和实验室使用生态生理仪器（如叶绿素仪、冠层分析仪、气孔计和压力室）收集的。采集生物量样本以确定产量。所呈现的数据已平均到子地块水平（环境和干旱）。该数据集可为未来专注于利用覆盖作物和其他栽培措施改善种植系统气候适应性的研究提供参考，也可能对荟萃分析有用。
