In this study, we investigated the effect of different organic fertilizers and fertilization system on red pepper (Capsicum Annuum L.) growth and soil chemical properties. This experiment was carried out; 1) to compared growth and soil chemical properties by different organic fertilizers (MEC: mixed expeller cake, MOF: mixed organic fertilizer, OCF: organic complex fertilizer), and 2) to evaluate the effect of fertilization methods (NPK treatment, Organic fertilizer treatment). Organic fertilizers were applied with two different methods: single application (SA) and split application (SP). The highest yield and nitrogen use efficiency were observed in MOF with SP method. After harvest, soil pH was decreased but, Electrical conductivity was increased in all organic fertilization treatments due to increasing of nitrogen compound such as NO 3 -N and NH4-N. This result indicated that MOF with SP was effective agricultural practice compared to NPK treatment. However, further study should be required to evaluate long-term effect of organic fertilizer application on soil properties and crop yield.
This study investigated the effect of different livestock manure composts application on yield, soil chemical properties and carbon sequestration in maize cultivation. The experiment consisted of six different fertilizations; no fertilization (control), chemical fertilizer (NPK), pig manure (PM), NPK + residue of maize (NPKR), NPK + pig manure compost + residue of maize (NPKPR) and NPK + cow manure compost + residue of maize (NPKCR). The yield of maize under NPKPR (5,064.0 kg 10a -1 ) and NPKCR (4,183.7 kg 10a -1 ) were higher than that of NPK (3,775.6 kg 10a -1 ). In soil chemical properties, pH, EC and Avail. P 2 O 5 were increased when livestock compost applied in soil. The content of soil organic carbon (SOC) was higher in order: NPKPR (3.37 g kg -1 ) > NPKCR (3.27 g kg -1 ) > NPKR (3.12 g kg -1 ) > PR (2.88 g kg -1 ) > NPK (2.79 g kg -1 ) > NF (2.48 g kg -1 ). The highest SOC stock was observed in NPKCR (14.67 kg C ha -1 ) due to the high SOC and low bulk density. In conclusion, application of livestock manure composts with inorganic fertilizer increase maize yield, SOC stock. Therefore, it is recommendable for suitable soil management strategy to improve soil fertility and increase crop yield in upland soil. Further study might be required to evaluate long-term compost application effect on soil chemical properties and crop yield.
Korea is one of countries that have high application rates of inorganic fertilizers. Recently, environmental pollution has been announced due to overuse of fertilizer. To reduce the fertilizer usage, agricultural policies in terms of environmental sustainability has been introduced since the 1990s. This study aims to investigate total fertilization rates by nutrients and food crops in 9 provinces of Korea. In results, the average of total fertilizer inputs (N-P 2 O 5 -K 2 O) was 18.3-11.2-12.7 kg 10a -1 . Total fertilizer usage of potato was 35.5 kg 10a -1 as N that was higher than other crops. The order of contribution to total fertilizer use was inorganic fertilizer > compost > organic fertilizer. As a result, main concern of excess and use of fertilizers were focused on inorganic fertilizer. However, because of the high nutrient content of compost, the application rate of compost should be monitored and controlled. Therefore, long-term monitoring and proper training is required to understand nutrient characteristics of fertilizer and to reserve environmental sustainability in agriculture.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.