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牧草生产潜力模拟模型(For-PASM)是模拟牧草的生长和产量形成的应用模型。For-PASM包括常年模拟和牧草品种参数调试两个系统。各系统包含生长周期、叶面积动态、收割期与收割次数及光合生产和产量等模块。牧草的生长发育是由气候因素决定的,依据积温来确定牧草生育期和收获期,禾本科以抽穗期为收获期,豆科牧草以初花期为收获期。模型的功能是模拟牧草的收获期、产量季节性动态以及年产量。用四川雅安市多花黑麦草(Lolium multiflorum Lam)和扁穗牛鞭草(Hemarthria compressa)生产数据进行检验。结果显示,For-PASM在模拟牧草收割期和牧草季节性的产量动态中,季节性干物质产量动态趋势与总产量均符合实际。
For-PASM is a model that simulates pasture growth and yield formation. For-PASM includes two systems for perennial simulation and forage variety parameter tuning. Each system includes the growth cycle, dynamic leaf area, harvest and harvest times and photosynthetic production and output modules. Forage growth and development are determined by the climatic factors, according to accumulated temperature to determine the forage growing and harvesting stage, gramineous heading stage for the harvest, legume forage for the first flowering stage. The model’s function is to simulate pasture harvest, seasonal yield dynamics, and annual production. The data of production of Lolium multiflorum Lam and Hemarthria compressa in Ya’an City, Sichuan Province were tested. The results showed that For-PASM was in line with the actual trends of seasonal dry matter yield and total yield in the simulation of the seasonal yield dynamics of pasture and pasture.