摘要
提出考虑土壤水分和温度影响的春小麦出苗模式．该模式以Ｗｅｉｂｕｌｌ关系为背景，假设春小麦萌发存在着一土壤水分下限（θｃ），在土壤水分大于θｃ时，种子萌发的滞后（Ｐ）与士壤含水量（θ）的关系为ｄＰ／ｄθ—ＫＰ．θ．温度对出苗的影响假定是通过影响反应速率（ＫＴ）实现，另外在考虑幼苗伸长受温度影响的条件下讨论了播种深度和萌发的关系．
A simplified spring wheat emergence model concerning the response to soil water content and temperature is presented. The model is developed from the Weibull distribu non function at the assumption that there is a threshold of soil water content (θc) for emergence.The dependence of emergence lag (P) on soil water content (θ) is as follow when θ>θc: dp/dθ = -Kp. θ. It is supposed that the emergence is effected by temperature by means of changing the constant of biological reaction (KT). According to Arrhenius equation, we have KT= A. EXP(-B/T). Finally we discussed the responses of emergence to sown depth.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1996年第4期631-637,共7页
Journal of Xiamen University：Natural Science
关键词
春小麦
出苗
水分
播种深度
温度效应
小麦
Spring wheat, Emergence, Soil water, Temperature, Sown depth,Model
