[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.
Zhao
Bin
B
State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai'an 271018, Shandong, China. binmakeyou@163.com
Dong
Shu-Ting
ST
Wang
Kong-Jun
KJ
Zhang
Ji-Wang
JW
Liu
Peng
P
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