Potential productivity of dryland spring maize grown on loess table land

Liu WenZhao; Wei Xiang; L. Y. Shan

The potential productivity of dryland spring maize was studied on Changwu Loess table land in the southern Loess Plateau. An equation for the relationship between maize yield and water was proposed: Pw=1.00-5.293 (1-k)2, where the Pw is the potential productivity index of dryland maize, and k is the water stress index, a ratio of water consumption to water requirement during the entire growth period of dryland maize under high soil fertility conditions.