نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناسی ارشد گروه علوم و مهندسی خاک ، دانشگاه تبریز ، ایران
2 استاد گروه علوم و مهندسی خاک، دانشکده کشاورزی،دانشگاه ارومیه
3 دانش آموخته دکتری گروه علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه؛
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Achieving optimal performance is possible by balancing the nutrients. Nutritional indicators are used to diagnose nutritional disorders and then optimize the use of chemical fertilizers. Therefore, to optimize the use of fertilizer in watermelon farms in the north of West Azarbaijan province, the method of compositional nutrient diagnosis (CND) was used and its results were compared with deviation from optimal percentage (DOP) method. For this purpose, soil and leaf samples were prepared from 150 watermelon farms in Poldasht region and the concentration of nutrients including nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn), copper (Cu) and boron (B) were determined by standard laboratory methods. Then the farms were classified into two high and low yield groups and the indices of nutrient were calculated by DOP and CND methods. According to the CND method, norms for N, P, K, Ca, Mg, Fe, Mn, Zn, Cu, B and residual elements (Rd) were determined as 3.04±0.18, 0.59±0.25, 2.87±0.22, 2.72±0.24, 1.31±0.31, -2.50±0.37, -2.75±0.38, -3/42±0.27, -4.50±0.28, -4.01±0.46 and 6.65±0.15, respectively. Comparison of the results of CND and DOP methods showed that in both methods nitrogen and potassium were the most negative indices among the macro elements, and also zinc and iron had the most negative indices and the most deficiency among the micro elements, so the results of both methods were similar. Finally, based on the indicators of elements, it is concluded the farms with low yield were in unbalanced status in terms of nutritional elements.
کلیدواژهها [English]