不同施肥模式对玉米肥料表观利用率的影响

Effects on Fertilizer Use Efficiency of Maize:Different Fertilization Modes

旨在为甘肃省玉米平衡施肥提供数据支撑,以甘肃地区玉米为试验材料,通过玉米大田试验,比较测土配方施肥(T1)、水肥一体化(T2)和施用缓控释肥(T3)3种施肥模式对玉米产量和肥料表观利用率的影响。结果表明,不同施肥模式下玉米籽粒产量表现为T2>T1>T3。氮磷钾养分的表观利用率和农学效率也表现为T2>T1>T3。其中,T2处理氮磷钾养分表观利用率较T1分别提高28.10%、46.84%和15.17%,较T3分别提高34.57%、62.92%和30.70%。T2处理氮磷钾养分农学效率和T1处理相比没有显著差异,但显著高于T3处理。综上所述,水肥一体化模式对提高甘肃地区玉米产量和肥料利用效率效果最好。

The objective is to provide data support for balanced fertilization of maize in Gansu Province.The maize in Gansu was use as material,the effects of soil testing and fertilization recommendation(T1),fertigation(T2),and slow/controlled release fertilizer(T3)modes on crop yields and fertilizer use efficiency were compared in field experiments.The results showed that for different fertilization modes,the grain yield of maize was as following:T2>T1>T3.The apparent use efficiency and agronomic efficiency of N,P and K also followed the above order.Compared with T1 treatment,the apparent use efficiency of N,P and K in T2 treatment increased by 28.10%,46.84%,15.17%,respectively,and increased by 34.57%,62.92%,30.70%,respectively,compared with those of T3 treatment.The agronomic efficiency of N,P and K in T2 treatment had on significant differences with those of T1 treatment,but they were obviously higher than those of T3 treatment.In conclusion,fertigation is the most effective fertilization mode for maize production in Gansu.