水分养分胁迫对冬小麦器官生长相关性影响研究

A Study on Correlation of Winter Wheat Organ Growth Under Different Water and Nutrient Stress

探讨作物各器官生长的相关性,对于调节它们之间的相对生长速率,使其向着有利于作物高产的方向发展和提高水肥利用效率具有重要作用。利用天津农学院灌溉试验基地对冬小麦进行了分阶段受旱试验,采用数理统计检验方法,对小麦在水分养分胁迫下各主要器官生长之间的相关性进行了分析。结果表明:①冬小麦返青后,水分、养分胁迫下对冬小麦的茎叶比有影响,对冬小麦的根冠比、茎粒比前期有影响,后期影响较小;②水分、养分胁迫下对冬小麦的根冠比、茎叶比、茎粒比随时间变化显著,地上部分和地下部分、茎和籽粒、茎和叶具有较好的相关性,各处理之间有显著差异;③水分胁迫、养分胁迫、水分养分双重胁迫会导致根冠比、茎叶比明显增大,而茎粒比明显减小。该冬小麦的各器官生长相关性定量关系可用于作物生长模型的改进,提高作物生长模型的机理性。

It is important to study the correlation between the growth of various organs of crops for regulating the relative growth rate among them,making it develop in the direction of being beneficial to the high yield of crops and improving the efficiency of water and fertilizer utilization.In this study,at the irrigation test base of Tianjin Agricultural University,the drought of winter wheat in different stages was tested,and the correlation between the growth of main organs of wheat under water and nutrient stress was analyzed by using mathematical statistical test method.The results showed as follows:①The stem leaf ratio of the winter wheat was affected by the water and nutrient stress,the root shoot ratio and the stem grain ratio of the winter wheat were also affected by the water and nutrient stress in the early stage,but less in the later stage after the turning green of the winter wheat;②The root shoot ratio and the stem leaf ratio and the stem grain ratio of the winter wheat changed significantly with the time under the water stress and the nutrient stress.There was a good correlation between the aboveground and the underground parts,the stem and the grain,the stem and the leaf.There were significant differences between the treatments;③The root shoot ratio and the stem leaf ratio increased significantly and the stem grain ratio decreased significantly under the water stress and the nutrient stress and the double stress of the water and the nutrient.The quantitative relationship of the growth correlation among the different organs of the winter wheat can be used to improve the crop growth model and enhance the mechanism of crop growth model.