Author(s):

Madhavan S and Sha K

Abstract: The experiment on the effect of organics along with Azospirillum (Root and soil isolate) on growth and leaf yield in Gymnema (<em>Gymnema sylvestre R.Br</em>) was carried out at the Department of Horticulture, Faculty of Agriculture, Annamalai University, Annamalai Nagar. There were totally seventeen treatments viz., T_1-Vermicompost (0.5kg) + Azospirillum (Root isolate), T_2-Vermicompost (1.0kg) + Azospirillum (Root isolate), T_3-Decomposed coir pith (2.5kg) + Azospirillum (Root isolate), T_4-Decomposed coir pith (5.0kg) + Azospirillum (Root isolate),T_5-FYM (5.0kg) + Azospirillum (Root isolate), T_6-FYM (10.0kg) + Azospirillum (Root isolate), T_7-Pressmud (2.5 kg)+ Azospirillum (Root isolate), T_8-Pressmud (5.0 kg)+ Azospirillum (Root isolate), T_9-Vermicompost (0.5kg) + Azospirillum (Soil isolate), T_10-Vermicompost (1.0kg) + Azospirillum (Soil isolate), T_11-Decomposed coir pith (2.5kg) + Azospirillum (Soil isolate), T_12-Decomposed coir pith (5.0kg) + Azospirillum (Soil isolate), T_13-FYM (5.0kg) + Azospirillum (Soil isolate), T_14-FYM (10.0kg) + Azospirillum (Soil isolate), T_15-Pressmud (2.5 kg)+ Azospirillum (Soil isolate), T_16-Pressmud (5.0 kg)+ Azospirillum (Soil isolate), T₁₇-Control. There were established in the pot culture and observed for certain growth characters like Plant height, Number of laterals plant^-1, Number of leaves lateral^-1, Leaf length (cm),Leaf breadth(cm), Leaf area(cm²), Single leaf weight(gm.), 100 Leaves weight(gm.), Fresh leaf yield plant^-1(gm.) and dry leaf yield were recorded four months of planting. The Treatment T_2-Vermicompost (1.0kg) + Azospirillum (Root isolate(10gm.)) recorded highest plant height (264.36), Number of laterals/plant (52.19), Number of leaves/lateral (110.13), Leaf length (7.88cm), Leaf breath (5.87cm), Leaf area (17.55cm²), Single leaf weight (0.44gm.), 100 leaves weight (44.18gm.), Fresh leaves yield/plant (3.86kg.) and Dry leaves/plant (2.91kg.). This was followed by T4- Decomposed coir pith (5.0kg) + Azospirillum (Root isolate 10 gm.).

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