Work

Effect of Controlled-Release Coated Fertilizer on Yield and Nitrogen Use Efficiency in a Red Pepper Cultivated Field

Year: 2020

Type: article

Abstract: Improving the nitrogen use efficiency (NUE) of crops is a technology that improves crop productivity and prevent environmental pollution simultaneously.A way to improve NUE is to develop and use a controlled release fertilizer.We developed a controlled release fertilizer in terms of controlled-release coated fertilizer for rhizosphere application (CRFR) which is a mineral fertilizer applying just under the plant root zone.In order to test effect of the developed CRFR on crop yield and NUE, field experiments were conducted with six levels of N (N 0, N 190, CRFR-N 16, CRFR-N 22, CRFR-N 27, and CRFR-N 33 kg ha -1 ) at the experimental station of Gyeonggi-do Agricultural Research & Extension Services (GARES) for two years (2017 to 2018).The fruit yield and NUE of red pepper were obtained using agronomic measurements.To determine optimum N rate of CRFR we applied linear-plateau model.Results showed that the yield was not significantly different between the two levels of CRFRs (N 22 and 27) and N 190 in 2017.Similarly, the yield was not different between the three levels of CRFRs (N 22 and 27) and N 190 in 2018 although almost six times as much N rate was applied in the N 190.Meanwhile, NUEs in the CRFRs were ranged from 69.8 to 88.5% which were much higher than the N 190 treatment (14.8%).Since CRFRs showed no different yields as compared to N 190, we analyzed the optimum rate of CRFR using the linear plateau model and CRFR applied at 23.1 kg N ha -1 was optimal for the yield.Our results suggest that CRFR was able to significantly increase crop productivity while reduce environmental pollution because of remarkably high NUE.

Source: 한국토양비료학회지

DOI: 10.7745/kjssf.2020.53.4.519