Document Type : Research Paper
Authors
1
Assistance professor of Soil and Water Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AEEO, Iran
2
Soil and Water Research Department, Semnan (Shahrood) Agricultural and Natural Resources Research and Education Centre, AREEO
3
Researcher Expert of Soil and Water Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO
10.22092/ijsr.2025.368423.768
Abstract
Use of leaf nutritional assessments offers a promising approach to determine the mineral status of plants. Tissue analysis is a useful tool for evaluating and optimizing nutrients for sugar beet, using Compositional Nutrient Diagnosis (CND) method. Therefore, this study was conducted over two cropping years (2018-2019) to assess the nutritional status of sugar beet in Semnan Province fields (Shahroud County), Iran. Each year, 30 fields with diverse soil properties were selected from different regions. In this study, high-yield groups in sugar beet fields were distinguished using the CND method through mathematical, statistical approaches, and application of cumulative functions. The results showed that 83.3% and 45% of the fields, respectively, had phosphorus and potassium deficiencies in the soil, with an average yield of 61.1 t/ha across all fields. Based on the average CND indices, the priority order of required nutrients for low-yield fields was determined as N>P>K for macronutrients and Mn>Fe>B>Cu>Zn for micronutrients. Therefore, in order to increase the yield of sugar beet in this province, it is necessary to pay attention to N, Mn, and Fe fertilizers. The findings of this study can be practically applied to enhance yield and improve the quality of sugar beet. The CND method, by considering balanced and imbalanced nutritional conditions as well as nutrient excesses and deficiencies, not only recommends appropriate fertilizer applications, but also prevents fertilizer wastage and financial resource loss. This method revealed that approximately 53.75% of the fields in Shahroud County are in an imbalanced nutritional state due to improper fertilizer management.
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