Volume 16, Issue 61 (fall 2012)                   JWSS 2012, 16(61): 197-206 | Back to browse issues page

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N. Miran, A. Samadi. Evaluation of Nutritional Status of Sugar Beet Using Diagnostic and Recommendation Integrated System (DRIS) in Comparison with Deviation from Optimum Percentage (DOP) in Western Azerbaijan Province. JWSS. 2012; 16 (61) :197-206
URL: http://jstnar.iut.ac.ir/article-1-2439-en.html
, nasermiran@yahoo.com
Abstract:   (9674 Views)
To establish DRIS norms in sugar beet (Beta Vulgaris L.) and compare them with DOP index, leaf samples were collected from 57 fields and N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B concentrations were determined. On the bases of crop yield, the fields were divided into two groups with low and high yielding performances. Standard DRIS norms were established for the different nutrient ratios. DRIS indices were calculated to evaluate nutrient balances and order of nutrients requirements. Sufficiency ranges of macro and micro nutrients were derived by DRIS technique. DRIS-derived sufficiency ranges were 3.0-5.4, 0.21-0.47, 1.7-3.7, 0.55-1.6, 0.19-0.34% for N, P, K, Ca, Mg, and 24-168, 10-19, 42-138, 10-14, 9-20 mg/kg for Fe, Zn, Mn, Cu, B, respectively. DRIS indices showed that among macro and micro nutrients in all low yielding fields, Phosphorus and copper had the most negative index values, respectively. The nutritional balance index (NBI) of DRIS and of DOP (∑DOP) were much more than zero in all low-yielding fields, indicating that there was imbalance between the absorbed nutrients by sugar beet. Comparison of the DRIS method with the DOP showed that both methods provide similar information in the interpretation of the results of leaf analysis.
Keywords: DRIS, Norm, Sugar beet, DOP
Full-Text [PDF 164 kb]   (1817 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2012/12/27 | Published: 2012/10/15

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