Morphological root parameters of newly formed roots from the Jena Experiment (Main Experiment, year 2003)

This data set contains measurements of morphological root parameters, i.e. length and diameter of newly built roots. Data presented here is from the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the Main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Since 2010, plots were weeded three times per year. […]

本数据集包含植物根系形态参数的测量数据，即新生根系的长度与直径。本数据集所用数据源自一项大型草原生物多样性实验——耶拿实验（Jena Experiment，详细信息见下文）的主实验样地。主实验中，研究人员从涵盖4个功能群（禾草类、豆科类、高大草本与小型草本）的60个物种库中，建立了82块20×20米的草原样地。2002年5月，研究人员从该物种库中选取不同数量的植物物种播种至各样地，以此构建植物物种丰富度（1、2、4、8、16和60种）与功能群丰富度（1、2、3、4个功能群）的梯度。自2010年起，每年需对样地进行3次除草作业。[…]