EFFECT OF INM PRACTICES ON NUTRIENT STATUS OF MULBERRY CULTIVATED AS BUSH AND TREE UNDER IRRIGATED CONDITION
An experiment was conducted during 2016-18 to study the impact of Integrated nutrient Management practices on existing bush type (3ꞌx3ꞌ) and tree type (10ꞌx10ꞌ) V-1 variety grown under irrigated condition at Doddamudugere village, Talavady, Erode district, Tamil Nadu. Two INM Combinations were tested against recommended dose and control, data recorded for three years. Leaf quality was also assessed through bioassay rearing of Silkworm. Treatment T4 of tree mulberry recorded significantly highest composition of macronutrients such as Nitrogen (5.24%), Phosphorus (1.63%) and Potash (4.54%) during the third year of experiment followed by T3-tree mulberry Nitrogen (4.98%), Phosphorus (1.17%) and Potash (3.68%) compared to other treatments in bush and tree mulberry cultivation irrespective of the years. Similar observations were recorded in case of secondary and micronutrients viz., Ca (3.82%), Mg (0.94%), S (2.84%) and Fe (163.67 mg kg ‾¹), Zn (72.24 mg kg ‾¹), Mn (52.29 mg kg ‾¹), Cu (5.05 mg kg ‾¹) and B (47.93 mg kg ‾¹) in T4 tree mulberry followed by T3 with Ca (3.76%), Mg (0.87%), S (1.91%) and Fe (148.11mg kg ‾¹), Zn (59.97 mg kg ‾¹), Mn (49.38 mg kg ‾¹), Cu (4.88 mg kg ‾¹), B (45.64 mg kg‾¹) also. All the eleven mulberry nutrients were recorded highest in tree plant leaf T4, 3rd year compare to 1st and 2nd year and other treatments. Silkworm rearing data recorded indicated highest single shell weight (0.51g) and shell ratio (25.5%) in T4 tree mulberry followed by T3 tree mulberry (0.490 g : 24.5%) respectively.
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