Characteristics of Fertility on Strawberry Cultivated Soil of Plastic Film House in Chungnam Province in Korea
2010
Choi, M.T., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Lee, J.I., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Yun, Y.U., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Lee, J.E., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Lee, B.C., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Yang, E.S., Chungcheongnam-do Agricultural Research and Extension Services, Yesan, Republic of Korea | Lee, Y.H., Gyeongsangnam-do Agricultural Research and Extension Services, Jinju, Republic of Korea
To reduce the dose of fertilizers is very important to sustainable production of many horticultural crops, including strawberry. In order to practice the environment friendly agriculture of strawberry cultivation in plastic film house, soil chemical properties of 435 soil samples (232 for loam, 83 for sandy loam, and 120 for silt loam) in Chungnam Province from 2008 to 2009 were determined. The average of pH, EC, OM, Av. P₂O∧5, Ex. K+, Ex. Ca²+, Ex. Mg²+, and Ex. Na+ was 6.5, 2.28 dSm-¹, 26 g kg-¹, 910 mg kg-¹, 1.09 cmol∧c kg-¹, 8.3 cmol∧c kg-¹, 2.5 cmol∧c kg-¹, and 0.58 cmol∧c kg-¹, respectively. The content of Av. P₂O∧5 in sandy loam soil was significantly higher than silt loam soil, whereas other properties showed no difference between soil texture. The kinds of strawberry cultivars showed no difference in soil chemical properties. The frequency distribution within optimum range of soil chemical properties was 30.6%, 35.4%, 37.0%, 5.3%, 8.5%, 8.5%, and 17.9% for pH, EC, OM, Av. P₂O∧5, Ex. K+, Ex. Ca²+, and Ex. Mg²+, respectively. Especially, excessive portion of Av. P₂O∧5, and Ex. Ca²+ were high 86.9%, and 86.0%, respectively. EC values of soil samples were significantly positive correlatoin with all chemical properties except soil pH. In principle component analysis of chemical properties in soil samples, the percentage of variance explained by PC 1 was 38.8%, while PC 2 explained 17.8% of the variance, for a cumulative total of 56.6%. These results were able to distinguish between soil textures and strawberry cultivars. Also, these results considered that understanding of soil chemical properties under using principal component analysis be able to improve amounts of fertilizers for sustainable agriculture in plastic film house.
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