Faba bean (Vicia faba L.) is a useful grain legume for production in Mediterranean climates due to its consumption as food for humans and feed for animals, and its ability to symbiotically fix atmospheric nitrogen. Currently, in Morocco a substantial fraction of faba bean is sown under a rainfed management scheme in which the crop is sown after about a 15-day delay following the first rains after the dry season. The 15-day delay allows weed seeds to germinate and be killed during land tillage prior to sowing of faba bean. However, the 15-day delay shortens the growing season and may negatively impact seed yield. Two alternate sowing date criteria were simulated for faba bean sowing date in Morocco as approaches to increase production. In addition to the 15-day delay management by farmers, sowing was simulated to occur immediately following accumulation of 10 mm or 25 mm of water in the soil. A geospatial analysis was undertaken using the SSM-faba bean model to simulate production on a 1° × 1° grid across Morocco. Eighty three locations were each simulated for 30 growing seasons of weather input. The simulation results for the 25-mm sowing date criteria resulted in decreased geographical area in which faba bean could be grown while the 10-mm sowing date criteria resulted in an expanded geographical area for faba bean production. The average yield based only on seasons in which sowing was achieved, was fairly stable among the sowing-date criteria. The probability of yield increase of the 10-mm sowing date criterion as compared to the 15-day delay sowing was greater than 50% in much of the area found suitable for faba bean production. Assuming an acceptable method for weed control for the 10-mm sowing date criterion, this alternate management could expand faba bean production in Morocco as compared to the current practice of a 15-delay in sowing date.

蚕豆（Vicia fabaL.) 是一种在地中海气候下生产的有用谷物豆类，因为它可以作为人类的食物和动物的饲料食用，并且具有共生固定大气氮的能力。目前，在摩洛哥，大部分蚕豆是在雨养管理计划下播种的，该计划在旱季后的第一场雨后延迟约 15 天后播种。15 天的延迟允许杂草种子在播种蚕豆之前的土地耕作过程中发芽并被杀死。然而，15 天的延迟会缩短生长季节，并可能对种子产量产生负面影响。作为提高产量的方法，模拟了摩洛哥蚕豆播种日期的两个交替播种日期标准。除了农民15天的延迟管理，模拟在土壤中积聚 10 毫米或 25 毫米水后立即进行播种。使用 SSM-faba bean 模型进行了地理空间分析，以模拟摩洛哥 1° × 1° 网格上的生产。针对 30 个天气输入的生长季节分别模拟了 83 个地点。25 毫米播种日期标准的模拟结果导致可种植蚕豆的地理区域减少，而 10 毫米播种日期标准导致蚕豆生产地理区域的扩大。仅基于播种季节的平均产量在播种日期标准中相当稳定。在适合蚕豆生产的大部分地区，10 毫米播种日期标准与延迟 15 天播种相比，产量增加的可能性大于 50%。