| 【Objective】The technology of chemical fertilizer application reduction is an important way to avoid
environmental pollution caused by excessive fertilization and promote the sustainable development of agriculture. This study
was conducted to explore the replacement of chemical fertilizer with organic fertilizer, and provide scientific basis for the
application of commercial organic fertilizers in winter potato by replacing chemical fertilizers.【Method】With Favorita as
experimental material, the effects of three commercial organic fertilizers and chemical fertilizer treatments on yield, economic
benefit, apparent fertilizer use efficiency and quality of winter potato in Guangdong Province were studied.【Result】There
was no significant difference between the quality of potato tubers treated with organic fertilizer and chemical fertilizer. Among
the three organic fertilizer treatments, the commercial organic fertilizer 2 had higher total yield, marketable tuber yield and
total value than those of the other two commercial organic fertilizer treatments while the cost was lower than that of the other
two. The apparent fertilizer use efficiency of commercial organic fertilizer 2 was 10.17%, which was 1.96% and 3.52% higher
than that of commercial organic fertilizer 1 and commercial organic fertilizer 3, respectively. The organic manure equivalenceof commercial organic fertilizer 2 treatment was 66.02%. Overall, commercial organic fertilizer 2 was a better choice with a good
price in the process of replacing chemical fertilizer with organic fertilizer in winter potato. 【Conclusion】The organic fertilizer
could partly replace chemical fertilizer in winter potato cultivation, and achieve reduction of fertilizer application. |
