调亏灌溉不同灌水量对玉米生长和产量的影响

为了探究调亏灌溉对玉米生长的影响,设计了玉米不同生育期亏水试验。试验结果表明,拔节-孕穗期复水后玉米株高生长速度最快,进行亏水处理对玉米根系有显著抑制作用。玉米不同生育期的水分亏缺对玉米株高和产量的影响程度排序分别为:拔节-孕穗期>三叶-拔节期>孕穗-灌浆期>灌浆-成熟期。在三叶-拔节期进行适宜程度的亏水处理可以明显提高灌溉水利用率,玉米不但不会减产,反而能提高玉米产量性状。该研究为寻找作物高产、节水的技术方法打下基础。

Effects of different irrigation amount on maize growth and yield under regulated deficit irrigation

In order to explore the effect of regulated deficit irrigation on maize growth, a water deficit experiment was designed for maize at different growth stages. The results showed that the growth rate of maize plant height was the fastest after rehydration from jointing to booting stage, and water deficit treatment had significant inhibitory effect on maize root system. The order of the effects of water deficit at different growth stages on maize plant height and yield is jointing-booting stage > three leaves-jointing stage > booting-filling stage > filling-maturing stage. Appropriate deficit water treatment during the three-leaf to jointing stage can obviously improve the utilization rate of irrigation water, and corn will not reduce production, but can improve the yield characteristics of corn. The research laid a foundation for finding high-yield and water-saving technologies for crops.