Effect of irrigation, lime and Mg fertilizer levels on dry mass accumulation and Mg utilization of maize
灌水、石灰和镁肥水平对玉米干物质积累和镁素利用的影响

Effects of two irrigation levels, three lime levels and three Mg fertilizer levels on dry mass accumulation and Mg utilization of maize were investigated. Results showed that irrigation enhanced dry mass accumulation and Mg uptake of maize. Lime did not affect the dry mass accumulation significantly, but reduced Mg uptake and increased soil Mg fixation. The effect of lime on Mg apparent recovery fraction varied with the lime level. Applied Mg fertilizer increased the dry mass accumulation of maize to some extent and enhanced Mg uptake and soil exchangeable Mg content significantly. Thus Mg uptake and utilization of maize could be affected not only by soil Mg level, but also by irrigation and lime etc.