Journal ID : AMA-15-07-2025-13597
[This article belongs to Volume - 56, Issue - 07]
Total View : 374

Title : STANDARDIZATION OF DRIS NORMS FOR LITCHI ORCHARDS UNDER JAMMU REGION

Abstract :

To compute the diagnosis and recommendation integrated system (DRIS) criteria, information on the leaf mineral composition, available soil nutrients, and associated mean fruit yield of 50 litchi orchards in the Jammu and Kathua regions of the Jammu area in 2022 and 2023 was used. Due to the DRIS norms derived from leaf analysis, the ideal ranges for macronutrient concentrations were as follows: Phosphorus (P) varies between 0.13 - 0.23%, potassium (K) ranges from 0.73 - 1.04%, sulphur (S) ranges from 0.18 - 0.27%, calcium (Ca) varies at 1.72 - 1.93%, while magnesium ranges from 0.35 - 0.55%. These ranges are appropriate for micronutrients: Molybdenum (Mo): 1.8–2.81%; boron (B): 6.25–1.96%; zinc (Zn): 9.34–11.93 ppm; iron (Fe): 89.24–156.98 ppm; copper (Cu): 7.24–10.42 ppm; manganese (Mn): 8.97–21.64 ppm. Fruit yields within these nutritional ranges ranged from 16.55 to 114.24 kg per tree. Similarly, DRIS indices for soil fertility were created using soil samples taken at 0–15, 15–30, and 30–45 cm, corresponding to comparable fruit yield levels. The following were found to be the optimal limits of nutrients available in the soil (mg/kg or kg/ha): 8.84–15.46 kg/ha in phosphorus (P), 93.17–199.15 kg/ha in potassium (K), 6.79–11.42 mg/kg during sulphur (S), 0.35–4.36 mg/kg with zinc (Zn), 2.81–13.42 mg/kg in iron (Fe), 1.44–4.43 mg/kg in copper (Cu), and 0.28–2.84 mg/kg in manganese (Mn) boron (B) at 28.90-51.80 mg/kg, and molybdenum (Mo) at 0.18-0.30 mg/kg. According to leaf-based DRIS indices, 55% of the orchards had potassium deficiencies, followed by nitrogen (25%), calcium (15%), & magnesium (5%). On the other hand, magnesium was found to be excessive in 45% of the orchards, followed by nitrogen, phosphorus, potassium, and calcium.

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