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Effects of Nutrient Source on Soil Physical, Chemical, and Microbial Properties in an Organic Pear Orchard
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 Title & Authors
Effects of Nutrient Source on Soil Physical, Chemical, and Microbial Properties in an Organic Pear Orchard
Choi, Hyun-Sug; Li, Xiong; Kim, Wol-Soo; Lee, Youn;
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 Abstract
BACKGROUND: This study was conducted to investigate the effects of different organic treatments and a chemical fertilizer on the soil chemical, physical, and microbial properties in an organic pear orchard. METHODS AND RESULTS: Control was referred as a NPK chemical fertilizer (15N-9P-10K) and organic treatments included compost containing with oil cake, compost containing with humic acid, and compost containing with chitin substance. All treatments applied at rates equivalent to 200 g N per tree per year under the tree canopy in March 30 of 2008 and 2009. Soil bulk density, solid phase, liquid phase, and penetration resistance were not significantly different among the treatments. Organic treatment plots had greater organic matter, total nitrogen, potassium, and magnesium concentrations compared to control, and the nutrient concentrations were not consistently affected by the organic treatments. Microbial biomass nitrogen and carbon, dehydrogenase, acid-phosphatase, and chitinase activities overall increased from March to August. Organic treatments, especially compost containing with oil cake or chitin aicd, increased the microbial variables compared to control. CONCLUSION(s): All the organic treatments consistently stimulated soil biological activity. The consistent treatment effect, however, did not occur on the soil mineral nutrition as the trees actively taken up the nutrients during a growing season, which would have diminished treatment effects. Long-term study required for evaluating soil physical properties in a pear orchard.
 Keywords
Chitin;Humic;Oil cake;Organic fertilizer;Soil properties;
 Language
Korean
 Cited by
1.
유기 자재에 따른 논토양의 특성 및 벼 생산성 비교,김현우;최현석;김병호;김홍재;최경주;정덕영;이연;박광래;

시설원예ㆍ식물공장, 2011. vol.20. 3, pp.241-245
2.
유기자재와 강수량이 수수${\times}$수단그라스 교잡종의 질소이용효율에 미치는 영향,최현석;이연;정정아;지형진;이상민;국용인;정석규;

한국유기농업학회지, 2012. vol.20. 3, pp.357-368
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