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해안간척지 토양의 생물학적 토성 개량에 관한 연구 3

Biological improvement of reclaimed tidal land soil (III); Changes of saline soil by addition of organic materials

Korean Journal of Microbiology 1969년 7권 1호 p.29 ~ 40
홍순우, 최양도, 김홍석, 최영길,
소속 상세정보
홍순우 (  ) - 서울대학교 문리과대학 식물학과
최양도 (  ) - 서울대학교 문리과대학 식물학과
김홍석 (  ) - 서울대학교 문리과대학 식물학과
최영길 (  ) - 서울대학교 문리과대학 식물학과

Abstract


Two kinds of organic materials, powders of Salicornia and Oryza sativa L. wre added as a source of organic matter to the suspensions of saline soils(soil : water = 1:3) to be 4 per cent of dried saline soil grams. And then, the samples were incubated at 28℃ to improve the decomposition of organic materials by soil microflora. Results of this experiment are summarized as followings : 1) The pH of soil suspension showed its highest value on the second or third week after the treatments, which were similar to those of the soil microflora. Results of this experiment are summarized as follwings : 1) The pH of soil suspension showed its highest value on the second of third week after the treatments, which were similar to those of the soil microflora populations. 2) Salinity increased up to the second week and the highest value of it appeared in the samples which were treated with the powder of Salicornia. In general, the salinity of all samples decreased on the third week after the treatment. The fact was assumed the possibilities of desalination from saline soil by the microbial actions. 3) Soil microflora such as bacteria, actinomycetes and fungi, were determined its populations soil microflora is to act as decomposer in soil. Both of the bacteria and actinomycytes population showed in the third weak after the treatment. In general, 30-years old of saline soil contained microbial population much more than those of 5-year old of saline soil. Salicornia powder favored the increase of both the bacteria and fungal population, and Oryza sativa L. seemed to have been a great role in increase of actinomycetes. Especially, fungal population of the untreated soil suspension contained higher microbial populations more than those of the soils treated with both of the organic materials. 4) Sugar contents of soil suspensions decreased remarkably on the first week after the treatments. 5) The amount of nitrate had similar tendency to those of population changes of soil microflora. Total acidity decreased continuously and the amount of potassium showed its highest value on the third week treatment. However, the amount of phosphorus was determined to be insignificant.

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