摘要
采用系统动力学软件Stella,模拟研究了小麦群体的日光合作用量,并经呼吸消耗与物质转化形成生物量的动态变化,同时,模拟紫外辐射增强对小麦光合作用的影响引起的干物质重量的变化。通过均方根差和相对误差对干物重的模拟值与观测值之间的符合度进行统计分析。结果表明,模拟值与实测结果没有显著差异,说明运用Stella开展作物的生长发育过程的模拟是可行的,这为气候与环境条件变化下作物生长的模拟模型建立提供了一条新的途径。
The rapid decline in stratospheric ozone concentrations has been confirmed by satellite measurements, especially given recent evidence that global warming may exaggerate ozone depletion. So, the biologically active short-wavelength ultraviolet-B radiation will increase in ground surface, changing ecosystem of ground surface. Investigations of the responses of crops to increased UV-B radiation have mostly been studied at home and abroad, utilizing qualitative analysis and statistics analysis, less quantitative analysis by numerical simulations. Dynamic model development for describing complex ecological systems continues to grow in popularity. The objective of this study is to construct a simulation model for predicting the photosynthetic production and dry matter accumulation under increment UV-B radiation, according to the simulation model of crop growth, added the stress factor of UV-B radiation, utilizing the commercial available software package Stella. Daily total photosynthetic rate, and variation of total biomass which was subtracting respiration and transformation from it, were simulated in the paper, under increment UV-B radiation, considering the effects of daily temperature and crop physiological age on photosynthesis rate. The results of testing the dynamical model showed that there was no significant difference between the simulated and observed values of dry matter weight, and the simulation process of accumulated dry matter was reliable, compared with other research, according to the statistics analysis of root mean square error and relative error. So, it was feasible that simulating the growth, development and dry matter accumulation of wheat and other crop by software Stella in windows system. So, Stella will become one new method to simulating the crop growth and biomass accumulation.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第6期2325-2331,共7页
Journal of Agro-Environment Science
基金
国家自然科学基金(40775072)
南京信息工程大学科研基金(20070023)
关键词
紫外辐射
光合作用
呼吸作用
物质积累
系统动力学
UV-B radiation
photosynthesis
respiration
dry matter accumulation
system dynamics
