润色下面这个句子：In recent years maize yield growth per year has been only about 16 for the world and 20 for China both of which was less than the increased demand 24 to meet food security in the middle of th

In recent years, the annual growth in maize yield has been limited to approximately 1.6% globally and less than 2.0% in China, which falls short of the increased demand of 2.4% required to ensure food security by the mid-century. (Shiferaw et al., 2011; Tilman et al., 2011; van Dijk et al., 2021)