Effects of water-logging on the chemical properties, microflora and biomass in continuous cropping of cucumber soils
1989
Kim, H.W. (Rural Development Administration, Kwangju (Korea R.). Research Bureau Chonnam Provincial) | Kim, Y.W. | Kim, K.S. (Chonnam National Univ., Kwangju (Korea R.). Dept. of Agricultural Chemistry)
A series of the experiments were conducted to evaluate the effects of the water-logging in continuous cropping soils of cucumber. The values of pH in water-logged treatments were from 5.50 to 5.90. Those of EC were less than 0.3mmhos/cm, were lower than those of control plot. The ratios of Ca/Mg, Ca/K, Mg/K respectively 2.5, 4.8, 2.0, were similar to the standard values. These changes were suitable for cucumber planting. And the number of bacteria among the microflora were determined increased from 10** (6) to 10** (7) cells/g dry soil, while that of the Fungi, Fusarium spp. Pythium spp, and Phythophthora spp decreased. In proportion to these changes of microflora, the ratios of B/F in water-logging plot were higher than in the control plot. The contents of Biomass-C were shown 10.47mg/100a soil to 36.12mg/100g soil to 36.12mg/100g soil, and the contents of that in water-logging were more than in control plots
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