Supplemental OpenSimRoot Files

Supplemental OpenSimRoot setting files used to generate simulations of Phaseolus vulgaris and Phaseolus acutifolius root systems. Models of <em>P. acutifolius </em>root architecture had no adventitious roots, one whorl consisting of four basal roots, and a basal root angle of 40 degrees from the soil surface. Models of <em>P. vulgaris </em>simulations had six adventitious roots, three whorls consisting of twelve basal roots, and a basal root angle of 35 degrees from the soil surface. All other plant properties were held constant in all simulations. Plant growth was simulated for 40 days after germination. Given its mobility with water in the soil profile, nitrate was used as a proxy for water in the model. To simulate water limited conditions, a mild nitrogen stress (106.5 kg/ha available N) was imposed and availability was stratified by soil depth. Boundaries were applied to permit root growth within a 0.6 m x 0.6 m x 1.5 m deep soil volume to emulate a similar soil volume as within a planted row in the field. The vertical boundaries mirror roots that reach the boundary back within the permitted root zone, maintaining a total root length similar to that of field conditions.本数据集包含用于生成普通菜豆（*Phaseolus vulgaris*）与尖叶菜豆（*Phaseolus acutifolius*）根系模拟结果的补充OpenSimRoot配置文件。尖叶菜豆（*P. acutifolius*）的根系构型模型不含不定根（adventitious roots），仅具1轮共4条基生根（basal roots），基生根与土壤表面的夹角为40°。普通菜豆（*P. vulgaris*）的模拟模型则具备6条不定根，包含3轮共12条基生根，基生根与土壤表面的夹角为35°。所有模拟中其余植株性状均保持一致。模拟时长为植株萌发后的40天。考虑到硝酸盐在土壤剖面中与水分的运移特性相似，本模型以硝酸盐作为水分的替代指标。为模拟水分受限条件，试验施加了轻度氮素胁迫（有效氮含量为106.5 kg/ha），并按土壤深度对养分有效性进行分层设置。本研究设定了根系生长边界，限制根系在0.6 m×0.6 m×1.5 m（深）的土体内生长，以此复刻田间种植行内的土壤体积规模。垂直边界设置规则为：抵达边界的根系将在允许的根区范围内折返，以此维持总根长与田间实际生长情况相近。