华北农学报2016，Vol.31Issue(2)：125-130,6.DOI:10.7668/hbnxb.2016.02.021
雨养条件下植物生长调节剂对冬小麦根系生长和产量形成的调控研究
Effect of Plant Growth Regulator on the Root Growth and Yield Formation of Winter Wheat under Rain-fed Condition
摘要
Abstract
In order to study the coordinated regulation mechanism of plant growth regulator on winter wheat root growth and yield formation under rain-fed condition,a field experiment was conducted to determine effects of differ-ent treatments (the mixture of uniconazole and chlormequat chloride and water control)on yield formation,popula-tion quantity and root growth of winter wheat under rain-fed condition in the North China Plain.These results sug-gested that plant growth regulator significantly increased spike number and grain yield,but had no marked effect on spikelet number per spike and kernel numbers per spike.Plant growth regulator could promote the tillering of winter wheat before winter and enhance population quantity in early growth stage.Under plant growth regulator treatment, winter wheat root length and root surface area per plant were decreased significantly,however,root diameter,root number,root weight and root /shoot ratio per plant were significantly increased.At tillering stage,plant growth regu-lator had effect on winter wheat root length density in 0 -30 cm soil layer and root weight density in 0 -50 cm soil layer but had no effect in the deep soil layer.Plant growth regulator could coordinated regulated root growth and till-er formation of winter wheat,which contributed to shape reasonable population structure and increase yield.关键词
冬小麦/根系/产量/分蘖/植物生长调节剂Key words
Winter wheat/Root/Yield/Tillering/Plant growth regulator分类
农业科技引用本文复制引用
叶德练,管大海,张钰石,张明才,李召虎..雨养条件下植物生长调节剂对冬小麦根系生长和产量形成的调控研究[J].华北农学报,2016,31(2):125-130,6.基金项目
河北省科技计划项目（14227008D）；国家公益性行业科研专项 （）
