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利用杨陵点的全国生态协作试验资料对小麦冬春性不同品种的幼穗分化研究表明,低温与播种至主茎生长锥伸长期的历时天数呈显著负相关效应;单棱至二棱期是幼穗分化对低温敏感时期,此阶段均温、理论日照与伸长到二棱期的天数呈显著负相关效应;出苗至主茎生长锥伸长期的天数与均温关系随品种冬性增强,其相关性则由负效应转为正效应。
The study on the spike differentiation of different winter and spring wheat cultivars based on the National Ecological Cooperation Experiment at Yangling Point showed that there was a significant negative correlation between the low temperature and the number of days from sowing to main stem growth cone. There was a significant negative correlation between the spike differentiation and the cold sensitive stage, the average temperature at this stage, and the number of days between the theoretical sunshine and the elongation to the two-ridged days. The relationship between the number of days and the average temperature was significant Relevance changes from negative to positive.