对生长季土壤水分的测量值(采用中子测定技术),简要表明了向日葵与玉米水分利用的对比关系.这些结果说明:在水是作物生产的主要限制因素时,向日葵具有躲避干旱威胁的能力,而不是它对水的需要量较低.在明尼苏达地区,向日葵与其它条播作物相比,它以抗干旱,需水量少而著称.虽然向日葵不是一种很耐旱的作物,但当其它作物已经受到干旱严重威胁的情 The measured values ​​of soil moisture during the growing season (using neutron measurement techniques) briefly show the correlation between sunflower and corn water use.These results show that sunflower has the ability to evade drought threats when water is a major limiting factor in crop production Rather than its lower water requirement, Sunflower is known to be more drought-resistant and less water-demanding than other planted crops in the Minnesota area.Although sunflower is not a very drought-tolerant crop, other crops Have been severely threatened by drought