Evaluation of vineyards nutritional status using nutrition indices in Khodabande region

Considering the increased demand for more food, and reduction of reduce soil and water resources, protecting of land and improving the quality and quantity of yield per unit area is feasible with supplying soil and plant with nutrients needed. Diagnosis of plant nutrient status is an effective way to determine the pattern of nutrient intake and increase of the yield and improvement of the quality of agricultural products. Therefore, in this study using the DOP, DRIS and CND indices, nutrient status in leaf samples of vineyards in Khodabande from Zanjan Province were analyzed. Leaf samples were collected from 75 vineyards and then were done chemical analysis of N, K, P, Mn, Cu, Zn and B and the characteristics of yield. Optimization norms were determined by dividing vineyards into two groups of high and low performances. The results showed that most vineyards of Khodabande had K, Zn and Cu deficiencies. However, in this area, N, P, B and Mn are more than optimum norms. Also the results of DOP, DRIS and CND were compared with each other. Values of indices in some of the nutrients were different. Based on three Indices of DOP, DRIS and CND, Zn had deficiency in the most vineyards. DRIS and CND showed a trend of changes in nutrients better than DOP.