国家玉米产业技术体系项目(CARS-02-63);国家科技支撑计划项目(2013BAD07B04);华北黄土高原地区作物栽培科学观测实验站基金(25204120);supported by the Maize Industrial Technology System Construction of Modem Agriculture of China(CARS-02-63);the National Key Technologies R&D Program of China(2013BAD07B04);the Fund of Crop Cultivation Scientific Observation Experimental Station in North China Loess Plateau(25204120);the National Key Research and Development Project of China(2017YFD0300804)