不同控释肥在夏玉米种植中的应用效应

Study on application effect of different controlled-release fertilizer on maize

以郑单958为供试夏玉米(Zea mays L.)品种,采用裂区设计,研究了金正大、施可丰和住商3种玉米专用控释肥分别在288、240、192 kg/hm^23个氮素用量水平的应用效果。结果表明,在相同施氮量时,施可丰的氮肥利用率高于或接近金正大和住商肥料,住商的农学利用率和偏生产力高于金正大和施可丰肥料。综合比较氮素利用效率和产量结果,在鲁北地区的夏玉米上推荐施用住商玉米专用控释肥,推荐氮素用量为240 kg/hm^2。

A split block design experiment was carried out to study the application effect of three kinds of controlled-release fertilizer,including Jinnzhengda,Shikefeng and Zhushang,on summer maize cultivar Zhengdan 958,according to set three nitrogen amout lev⁃els of 288 kg/hm2,240 kg/hm2 and 192 kg/hm2.The results showed that the nitrogen use efficiency of Shikefeng was equal or higher than that of Jinzhengda and Zhushang,and the agronomical efficiency and partial productivity of Zhushang were higher than those of Jinzhengda and Shikefeng at the same nitrogen application rate.The application of special controlled-release fertilizer Zhushang was recommended on summer maize in the northern part of Shandong province,and the recommended amount of nitrogen was 240 kg/hm2.