液体复合肥对盐碱土养分含量和玉米苗期生长发育的影响

Effects of Applying Liquid Fertilizer on Nutrition Content in Saline-alkali Soil and Seedling Growth of Maize

[目的]筛选玉米苗期生长的最佳液体复合肥配方。[方法]通过室内盆栽试验,研究几种液体复合肥对盐碱土养分含量以及玉米苗期生长发育的影响。室内盆栽试验设置5个处理,以空白处理(CK)为对照,液体复合肥处理分别为平衡型配方(A)、中氮低磷高钾配方(B)、高氮低磷中钾配方(C)、低氮高磷中钾配方(D)。[结果]与对照相比,液体复合肥能够显著降低盐碱土p H,且显著提高速效磷、速效钾和碱解氮含量;各液体复合肥处理的苗期玉米根系干物重、地上部干物重、株高和茎粗均显著优于对照(CK);各液体复合肥处理能够明显改善苗期玉米各部位养分状况,显著提高养分利用效率;与其他液体复合肥相比,D处理能够显著提高盐碱土速效磷、速效钾和碱解氮含量,改善苗期玉米营养状况,地上部和地下部长势均明显改善,且氮、钾利用效率最高。[结论]在盐碱地上施用液体复合肥D对玉米苗期生长最为有利。

[ Objective]To screen the optimum formula of liquid fertilizer for maize seedling growth. [ Method ] The indoor pot experiment ofseveral kinds of liquid fertilizer was conducted to study its effects on the nutrient content of saline-alkali soil and the seedling growth of maize. The indoor pot experiment teatments included no amending（ CK） , liquid fertilizer A ,B , C , D. [ Result] Compared with the control , the liquid fertilizer could significantly reduce the pH of saline-alkali soil,increased the content of available ble nitrogen. The liquid fertilizer could significantly increase root dry weight,leaf dry weight,plant growth of seedling stage; the liquid fertilizer could significantly improve the nutritional status of maize seedlings5 leaves and roots,the use effi-ciency of nutrient was significantly higher than the control. The comprehensive comparison of several kinds of liquid fertilizer showed that the content of available phosphorus,potassium and alkali-hydrolyzable nitrogen,the nutritional status and growth of maroots,the nutrient use efficiency of D treatment was significantly better. [ Conclusion] The effect of applying liquid fertilizer D on seedlinggrowth of maize in saline-alkali soil is best.