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2008～2010年在陇东黄土旱塬进行春玉米田间试验,研究PAL肥料增效剂对黄土旱塬春玉米产量、水分利用效率(WUE)及光合特性的影响。结果表明,在相同施氮量情况下,配施凹凸棒(PAL)肥料增效剂玉米增产效果明显,施氮量180 kg/hm2、配施PAL肥料增效剂90 kg/hm2的处理春玉米产量和水分利用效率最高,3年平均分别为11 637.6 kg/hm2和43.8 kg/(mm.hm2),较不施肥处理分别增加14.4%和13.0%,较相同施氮量不配施PAL处理分别增加6.0%和5.4%,产量性状优,具有较高的光合速率、气孔导度、蒸腾速率和叶片水分利用效率。
Field experiment on spring maize in Loess Plateau of East Gansu from 2008 to 2010 was conducted to study the effects of PAL fertilizer synergist on the yield, water use efficiency (WUE) and photosynthetic characteristics of spring maize on Loess Plateau. The results showed that with the same amount of nitrogen application, the effect of increasing yield of maize with attapulgite (PAL) fertilizer synergist was obvious. The treatment of maize with 180 kg / hm2 of nitrogen fertilizer and 90 kg / hm2 of PAL fertilizer synergist, The average yield and water use efficiency were 11 637.6 kg / hm2 and 43.8 kg / (mm.hm2) respectively in the three years, increased by 14.4% and 13.0%, respectively, compared with no fertilization treatment, 6.0% and 5.4%, respectively, with good yield traits, higher photosynthetic rate, stomatal conductance, transpiration rate and leaf water use efficiency.