Change of Soil Chemical Properties according to Cultivation Area and Cultural Year for Platycodon grandiflorum
2010
Lee, C.H., Jinju National University, Jinju, Republic of Korea | Lee, S.W., Jinju National University, Jinju, Republic of Korea | Lee, H., Jinju National University, Jinju, Republic of Korea
The study result survey platycodon cultivation regions of Jinju(2), Sacheon(4), Hapcheon(3), Haman(3), and Sancheong(3) of Gyongnam regarding chemical properties of soil, inorganic nitrogen phosphorus by type of composition is as follows: pH and EC value were highest where platycodon cultivated for under 3 years in soils. Content of O.M equal to or less than 25 mg kg-¹, the average value for platycodoncultivation in korea. Content of exchangeable calcium in soils were 12, 14 cmol+kg-¹ in Hapcheon and Haman regions where platycodon was cultivated for two years which is 2~3 time higher level compared with the average upland soil of korea. Water solution boron confirmed approximated level of 3.0 mg kg-¹ in all survey regions, and the finding is about five times higher than average upland soil of korea which is 0.5 mg kg-¹. In the case of nitrogen, a significant difference was found depending on cultivation regions and continuous culture. Content of nitrogen in soils were difference according to cultivation area and continuous culture. The composition ratio according to the type of inorganic phosphorus showed the highest in order of Al-P greater than Ca-P greater than Fe-P greater than Saloid-P in all survey regions except for Hapcheon (five, seven years cultivated soils). The correlation showed high significance between available phosphate and inorganic phosphorus.
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