Effects of the soil properties and N, P, K application on the contents of inorganic constituents in the rhizome and leaf of Rehmannia glutinosa
1989
Park, B.Y. | Chang, S.M. | Choi, J. (Kyungbuk National Univ., Taegu (Korea R.). Coll. of Agriculture) | Park, S.J. (Korea Ginseng and Tobacco Research Inst., Taegu (Korea R.). Taegu Experiment Station)
The effects of soil properties and N, P and K application rates on the contents of inorganic constituents in the rhizomes of Jihwang were investigated to know the condition for producing the better quality rhizoma of Jihwang. Most of soil texture for Jihwang cultivating belongs to sandy clay loam and sandy loam soils. The nitrogen contents in the rhizomes of Jihwang was negatively correlated with the contents of organic matter and total nitrogen in surface soils, whereas positively correlated with the sand contents in subsoils. The calcium contents in the rhizomes of Jihwang were negatively correlated with the sand contents, however, positively correlated with the contents of clay and organic matter in soils. The iron content was positively correlated with the contents of clay, available phosphorus and exchangeable potassium in surface soils. Much more contents of the inorganic constituents in the leaf of Jihwang was generally detected than that in the rhizome of Jihwang. The contents of iron and copper in the leaf was determined to be more than that in the rhizomes by ten times. In the results of field experiments, it is apparent that the nitrogen contents in the rhizoma and leaf increased with increasing N application rate more than 20Kg/10a and 10Kg/10a, respectively
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