---

作 者 ：穆天民

期 刊 ：林业科学 1990年 26卷 1期 页码：9-16

关键词：SPAC系统；

Keywords:SPAC system,

摘 要 ：从土壤(S)-植物(P)-大气(A)连续系统的观点出发,在处理1986和1988两年实测数据,确定一批参数和函数关系并建立逻辑结构图的基础上,编制程序用微机对北京杨SPAC系统的水分吸收、贮存、水势和蒸腾等生理生态学指标和土壤含水量的短期(10天)变化做了逐时和逐日预测。结果表明,通过微机实现的短期预测结果能较好地反映实际,各项相对误差一般在8%以下,个别最大的也不超过15%。本模型除理论意义外,还可用于预测苗圃地10天内土壤水分的变化,有助于指导灌溉实践。

Abstract:The observed data of poplar Beijing plantation in 1986 and 1988 were processed, a quantity of parameters and functions and the logical network (the physio-ecological model) were determined from the Soil-Plant-Atmosphere continous system (SPAC system). Based on this models, the short term (10 day) variation of the physio-ecological index of the water absorption, storage, water potential, transpiration of the Beijing poplar in SPAC system were predicted hourly and daily by microcomputer. The relative errors were below 8% and the maximum individual error were not exeeding 15%.

---