【摘要】 试验通过长效控释肥在夏玉米播种时一次性基施,探讨了不同用量的长效控释肥对玉米生长发育、产量、经济效益及环境的影响。结果表明:与农民习惯施肥(苗期及大喇叭口期各追482.1 kg/hm~2高氮复合肥)相比,除60%控释肥处理略有减产外,其余控释肥处理均表现不同程度地增产,增产率为1.1%~7.4%,部分处理的产量差异达到显著水平。在本试验条件下,综合考虑玉米产量、氮素利用效率和经济效益,采用普通施肥量80%水平的控释肥一次施用,可以达到省工、高产、高效、节肥的目的,宜于在华北平原夏玉米生产区推广应用。更多还原

【Abstract】 Different rates of long-term controlled-release fertilizer( CRF) were applied once when sowing summer maize to explore their effects on maize growth,yield,economic profits and environment. The results showed that compared with conventional fertilization( topdressing high-nitrogen compound fertilizer of 482. 1 kg/hm~2 for two times at seedling stage and bell stage respectively),except the treatment of 60% CRF with a little decrease of yield,the other treatments all showed increase in production in varying degrees with the range of 1. 1% ~ 7. 4%,and some showed significant differences. Comprehensively considering maize yield,nitrogen use rate and economic profit,the controlled-release fertilizer could be applied once at the amount of 80% of common fertilizer amount. It could realize laborsaving,high yield,high efficiency and fertilizer saving,and was beneficial for popularization in the summer maize production area in North China.更多还原