基于积温因子的草地植物生长特征模拟及统计分析  

Simulation and statistical analysis of growing characteristics of grassland plant based on accumulated temperature

作　　者：张彩琴[1] 张军[1] 李静[2] 李茜若 

机构地区：[1]内蒙古农业大学理学院,呼和浩特010018 [2]内蒙古农业大学生态环境学院,呼和浩特010018

出　　处：《干旱区资源与环境》2016年第12期157-163,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(31160091)资助

摘　　要：文中以内蒙古典型草原羊草+大针茅(Leymus chinensis+Stipa grandis)群落为研究样地,选取8种代表性植物,采用积温生态因素代替时间变量的方法,分别对其单珠生物量的动态变化与积温因子累积关系做了如下研究:1)对Logistic模型进行了改进;2)建立了植物生物量与积温因子累积关系的Logistic生长模型;3)分别模拟8种植物对积温因子的响应特征并给出了数据分析。结果表明:8种植物相对生物量与相对积温关系基本呈S型变化,其中决定系数均达到0.94以上,说明积温既是影响干物质积累的重要因素,同时作为衡量植物生育过程的时间标尺具有其可靠性与可行性。另外,由模型确定的多个生长特征参数值分析表明,不同生活型功能群之间对积温因子的响应差异较大,而相同功能群的不同植物种对积温因子的响应差异相近,该结果显示出与植物生活型功能群的分类具有一致性。Taking Leymus chinensis ＋ Stipa grandis community of Inner Mongolia typical steppe as the research sample,selecting 8 kinds of representative plants,using accumulated temperature ecological factors instead of time variable,we studied the relationships between individual plant biomass dynamic changes and accumulated temperature by following approaches： 1） To improve the logistic model. 2） To set up logistic growth model of accumulated relationship between a plant biomass and accumulated temperature. 3） To simulate response characteristics of 8 kinds of plants on temperature and give the data analysis. The results show that relationship of 8 species of plants between relative biomass and relative accumulated temperature was roughly S-shape change. The coefficient of determination reached above 0. 94,which indicates that accumulated temperature is not only important factors affecting the dry matter accumulation but also has its reliability and feasibility as time scale during growing process of plant. In addition,the growth characteristic parameters value of the model indicates that response difference of different life-form functional group on accumulated temperature factors is relatively large,and that of different plant species of the same functional group on accumulated temperature factors is relatively small. Thus the related results show that it is consistent with the classification of plant life-form functional group.

关 键 词：典型草原 单株生物量 积温因子 Logistic生长模型 生活型功能群 

分 类 号：Q948[生物学—植物学]