摘要
农田系统的模拟研究已见许多报导。Stapleton以光照、温度为输入,模拟棉花生长动态。Bowen模拟了花生的生长模型。Ritchiel(1983)作了小麦的模拟模型。这些模拟模型均以作物生理生态为基础并对产量形成原因作了合理的解释。齐文虎首先运用自动控制理论研究了套作玉米生态系统的数学模型。裴絧文也运用这一理论对中稻密植生态系统作了研究,显示了应用自动控制理论解决生态系统问题之前景。本文在前人工作基础上对有棉蚜为害和无棉蚜为害的两类棉田作了比较研究,为棉田优化管理提供理论依据。
A series of data obtained from injured and non-injured cotton were analysed with automatical control theory. A block diagram of cotton system was designed as page/0: Where: U(s): irradiation. D(s): heat lost due to evaporation. These 2 functions are Fourier series transformed by Laplace. X(s): material accumulation. P(s): leaf area. These 2 functions are Laplace transformed of the Maclaurian expansion from logistic equation. M(s): fertilization. It may be removed from the block diagram when it is not implemented. G1(s),G2(s)H(s), are transfer function. The stability and sensitivity of each system and each closed loop were compared. The pertubation of parameters was operated yet.
出处
《生物数学学报》
CSCD
北大核心
1989年第1期9-15,共7页
Journal of Biomathematics
