摘要
正确计算农业机器的可下地概率,不仅对机器系统的优化配备有重要影响,而且对合理安排农业生产、提高产量、降低成本具有重要意义。已有的几种确定机器可下地概率的方法在理论和实践上都存在一定的缺陷,不能满足实用的要求。在前面工作的基础上,通过对影响机器不能下地作业的多因素分析,建立了包括降雨量、日均温度、蒸发、前期降雨、径流、渗漏和土壤性质等因素在内的计算机器可下地概率的模型,编制了计算机程序。验证结果表明,该模型比较可靠、实用。
Determination of available working days is not only important to selection of farm machinery,but also to arrangement of agricultural production.Sevaral existing models for determination of available working days have more or less shortages in practical use.A new model,therefore,is developed based on previous works,in which the following ele- ments:rainfall,temperature,evaporation,runoff,percolation,soil performance,et al.,are analysed.The primary usage of the model shows that it is convenient to use and the result is satisfied.
关键词
农业机器
可下地概率
实用模型
machine field workable probability
working days
rainfall
temperature
evaporation
