Diagnosis of cucumber plant's healthiness by rapid biochemical test, simple nutrient analysis and xylem sap analysis: I. Comparison of analytical results occurred due to deficiencies of specific elements

Chung, G.-Chae; Ha, S.-Ho; Lee, S.-Hee

Journal of the Korean Society for Horticultural Science 33(5): 365-371

1992


ISSN/ISBN: 0253-6498
Accession: 009815702

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Abstract
In order to diagnose the nutritional status of cucumber plants rapidly and accurately, in vivo nitrate reductase, acid phosphatase and alkaline phosphatase activities were measured. Petiole analysis by simple nutrient analysis were also performed to measure the content of N, P, K, Ca and Mg and collected xylem sap was analysed to determine the contents of each elements. When cumber plants were induced with the lack of each elements, the status of N, P and Mg in the plants was best determined by petiole analysis. However, the status of potassium in the plant could be better determined with the xylem sap analysis. Calcium status in cucumber plants could be represented by alkaline phosphatase activity.