小麦温光发育模型的研究

1981～1984年,选用代表不同生态类型的25个小麦品种,在大田进行分期播种.通过分析温光等主要生态因子与小麦生长发育的关系,建立了各品种主要发育阶段的温光模型:播种至出苗为G=104.4751/(T-1.1032),出苗至二棱、出苗至拔节为V=a+bG+cP_(t1),二棱至抽穗、拔节至抽穗为V=a+bT+cL.文中认为,播种至出苗的日数(G)既能反映当时的温度条件,又可表示萌发时的“田间春化效应”;温光积(Ptl)则给“温度与光照之间存在明显的互补作用”找到了量的表达基础;因此,建模时采用这两个变量,是很有意义的.

A MODELLING STUDY OF THE EFECTS OF TEMPERATURE AND DAYLENGTH TO THE DEVELOPMENT OF WHEAT

Since 1981-1984, 25 cultivars of wheat (Triticum aestivum L.) of different ecological types, were planted at different dates in the Experimental Station of Shanxi Agricultural University, Taigu Shanxi,Under natural conditions, the relationship between development of wheat and different levels and combinations of main ecological factors were studied. The nonlinear model between the number of days of emergence (G) and the the daily average temperature (T) is G= 104.4751/(T-1.1032) . The model of temperature and photoperiod for emergence to double ridges or emergence to stem extension is V=a + bG + cPtl, for double ridges to heading or stem extension to heading is V = a+bT + cL. The biological meaning of models have been discussed in this paper.