Influence of nitrogen and azospirillum on growth, yield and N uptake of sesame under rainfed conditions

摘要

A field trail was conducted during kharif 1996 at Tirupati Campus of S.V. Agricultural College. The experiment was laid out in a split -plot design, replicated thrice. The main - plot treatments consisted of three varieties viz., Madhavi (V_1,), VR1-1 (V_2) and TMV-3 (V_3) and sub - plot treatments consisted of six nitrogen levels viz., No nitrogen (T_1), Azospirillum at 3 Kg ha~(-1) as soil treatment (T_2), recommended dose of fertilizer nitrogen 60 Kg N ha~(-1) (T_3). Azospirillum + 50 percnet recommended dose of nitrogen (T_4), Azospirillum + 75 percnet recommended dose of nitrogen (T_5) and Azospirillum + 100 percnet recommended dose of nitrogen (T_6). Azospirillum was applied @ 3 Kg ha~(-1) as soil treatment by placement to all plots. The soil of the experimental site was red sandy loam in texture with pH 6.8 low in organic carbon (0.29 percnet) and available N (138.7 Kg ha~(-1)) and medium in P (10.2 Kg ha~(-1)) and K (139.7 Kg ha~(-1)). The fertilizers were applied by band placement in furrows made with hand hoe at a depth of 5 cm at the time of sowing. Healthy and mature sesame seeds treated with Mancozeb @ 3 gm Kg~(-1) seed). The seeds are mixed with sand in the ratio of 1:3 to facilitate uniform distribution. The spacing adopted in seame is 30 X 10 cm. Need based plant protection measure were adopted. The crop was harvested at physiological maturity. Dataon growth, yield and N uptake were recorded from sample plants.