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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Soil electrical conductivity (EC) is widely used as an indirect indicator of salt accumulation. On-site diagnosis is a practical method for assessing soil conditions in real-time during crop cultivation. However, greenhouse soils often exhibit EC levels exceeding the standard osmotic stress threshold of 2 dS m<sup>-1</sup> (On-site diagnosis standard), leading to frequent high-stress diagnoses that do not account for crop-specific salt tolerance. This study aimed to refine on-site diagnostic accuracy by evaluating early growth responses of tomatoes, a moderately salt-tolerant crop, across various EC levels. A 35-day cultivation experiment was conducted using soil with 4% organic matter, representative of greenhouse conditions. On-site diagnosis soil EC was adjusted from 1 to 20 dS m<sup>-1</sup> in seven increments using KNO₃. Increased KNO₃ levels reduced soil-soluble phosphate, leading to a decrease in plant phosphorus content above EC 15 dS m<sup>-1</sup>. Growth analysis revealed that plant height, fresh weight, and dry weight significantly declined when EC exceeded 5 dS m<sup>-1</sup>, with growth at EC levels above 15 dS m<sup>-1 </sup>dropping to less than 10% of the 2.5 dS m<sup>-1</sup> treatment group. Based on soil and plant analyses, the optimal EC threshold for early tomato growth in soils with 43 g kg-1 organic matter was determined to be below 5 dS m<sup>-1</sup>. Therefore, in soils with EC exceeding 5 dS m<sup>-1</sup>, young tomato cultivation should be avoided unless appropriate salt management strategies are implemented.
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ABSTRACT
Introduction
Materials and Methods
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