[Effects of controlled-release fertilizers on summer maize grain yield, field ammonia volatilization, and fertilizer nitrogen use efficiency].
A field experiment with colophony-coated fertilizer (CRF) and sulfur-coated fertilizer (SCF) showed that under the same application rates of N, P and K, applying CRF and SCF increased the summer maize grain yield by 13.15% and 14.15%, respectively, compared to the application of common compound fertilizer CCF. When the applied amount of CRF and SCF was decreased by 25%, the yield increment was 9.69% and 10.04%, respectively; and when the applied amount of CRF and SCF was decreased by 50%, the yield had less difference with that under CCF application. The field ammonia volatilization rate in treatments CRF and SCF increased slowly, with a peak appeared 7 days later than that in treatment CCF, and the total amount of ammonia volatilization in treatments CRF and SCF was ranged from 0.78 kg N x hm(-2) to 4.43 kg N x hm(-2), with a decrement of 51.34%-91.34% compared to that in treatment CCF. The fertilizer nitrogen use efficiency and agronomic nitrogen use efficiency of CRF and SCF were also significantly higher than those of CCF.
State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai'an 271018, Shandong, China. binmakeyou@163.com
Bin
B
Zhao
Shu-Ting
ST
Dong
Kong-Jun
KJ
Wang
Ji-Wang
JW
Zhang
Peng
P
Liu
D000383:Agriculture / Q000379:methods; D000641:Ammonia / Q000032:analysis*; D018533:Biomass; D002681:China; D005308:Fertilizers; D009584:Nitrogen / Q000032:analysis*; D012621:Seasons; D014835:Volatilization; D003313:Zea mays / Q000254:growth & development*
D005308:Fertilizers; D000641:Ammonia; D009584:Nitrogen