内蒙古河套平原灌区向日葵增密高产群体根冠衰老特性及深松培肥防衰增产机理

Irrigated Hetao Plain in Inner Mongolia has high light-temperature potential in sunflower production. To break the yield potential limits in connection with shallow tilth layer and poor population structure, which lead to early senescence in high-density sunflower, we will carry out systematic studies on the physiological basis of yield in relation to root cortex senescence. In these studies we will determine the physiological and ecological mechanism of yield increase by plant senescence prevention, probe the optimum yield increase and antiaging techniques by subsoiling and soil fertility improvement, break the yield bottle neck and provide theoretical basis and technique support for taping sunflower yield potential and achieving high unit yield over large areas.

本项目立足内蒙古河套平原灌区向日葵的光温生产潜力和优势，以进一步挖掘高产潜力为目标，针对内蒙古河套平原灌区耕层浅、结构差，导致向日葵增密高产群体早衰、限制产量提高的核心问题，以不同类型品种为材料，在不同产量水平、不同种植密度、不同深松及培肥措施下，系统研究向日葵增密高产群体根冠衰老共性特性及其与产量关系的生理基础，明确向日葵增密高产群体防衰增产的生理生态机制，探索以深松改土和耕层培肥为核心的防衰增产优化技术途径，解决制约向日葵产量进一步提高的瓶颈问题，为不断挖掘向日葵高产潜力和实现大面积单产的提高提供理论依据和技术模式。