Short-term Miects on Soil Property and Leal Characteristics after Soil Amendment Treatments in Chestnut (Castanea crenata S. et Z.) Orchards

摘要

This study was conducted to evaluate short-term effects on soil properties and leaf characteristics after various treatments of soil amendments (organic fertilizer: 20 kg tree~(-1); compound fertilizer+wood-char: compound fertilizer 4 kg tree~(-1)+wood-char 2 kg tree~(-1); lime fertilizer: 3 kg tree~(-1); mixed fertilizer: compound fertilizer 1 kg tree_1+organic fertilizer 10 kg tree~(-1)+wood-char 1 kg tree~(-1); control) in chestnut (Castanea crenata S. et Z.) orchards of Jinju and Sancheong, Gyeongsangnam-do. Soil bulk density, soil pH, soil organic carbon, total nitrogen, exchangeable Ca~(2+) and Mg~(2+) in chestnut orchards were not significantly affected by soil amendment treatments. However, leaf weight was significantly higher in the lime fertilizer (0.65 g leaf~(-1)) in Jinju and the organic fertilizer (0.68 g leaf~(-1)) in Sancheong than in the control treatments (Jinju: 0.46 g leaf~(-1); Sancheong: 0.53 g leaf~(-1). Leaf area was also significantly higher in the lime fertilizer (79.1 cm~2 leaf~(-1) in Jinju and the soil amendments (70.4 cm~2 leaf ~(-1)78.2 cm~2 leaf~(-1) in Sancheong than in the control treatments (Jinju: 56.2 cm~2 leaf1; Sancheong: 60.5 cm~2 leaf~(-1). Nitrogen concentration of leaf increased significantly in the mixedfertilizer (2.51%) and the compound fertilizer+wood-char (2.50%) compared with the control (1.98%) treatments. The results suggest that soil properties were not affected by soil amendment treatments during short-term period, but leaf characteristics andnitrogen concentration can be an indicator of soil nutrient improvements in chestnut orchards.