Vol. 11, Issue 9 (2022)

Author(s):
SD Ninama, KM Gediya, MK Rathwa and GM Vaghela

Abstract:
The present research work entitled “Effect of integrated nutrient management on growth and yield parameters of rustica tobacco (Nicotiana rustica L.) and its residual impact of succeeding summer green gram (Vigna radiata L.)” a field experiment was conducted during rabi and summer season of years 2020-21 and 2021-22 at Bidi Tobacco Research Station, Anand Agricultural University, Anand, Gujarat. The experimental field had an even topography with a gentle slope having good drainage and sandy loam in texture. The soil of the experimental field at 0-15 cm depth was low in organic carbon and available nitrogen, medium in available phosphorus and potassium and slightly alkaline in reaction. The ten integrated nutrient management treatments viz., T₁: 100% RDF (200-00-00 kg/ha), T₂: 75% RDF + 25% N from FYM, T₃: 75% RDF + 25% N from poultry manure, T₄: 75% RDF + 25% N from castor cake, T₅: 50% RDF + 50% N from FYM, T₆: 50% RDF + 50% N from poultry manure, T₇: 50% RDF + 50% N from castor cake, T₈: 50% RDF + 25% N from FYM + Azotobacter, T₉: 50% RDF + 25% N from poultry manure + Azotobacter, T₁₀: 50% RDF + 25% N from castor cake + Azotobacter were tested in Randomized Block Design with four replications. Rustica tobacco variety GCT 3 was considered as main rabi crop and green gram variety GAM 5 was considered as summer residual crop. The experiment was conducted on the same site during both the years without changing randomization of treatments. Results of the experiment showed that growth parameters viz. plant height of rustica tobacco at 30, 60 DATP and at harvest was found non-significant due to influence of integrated nutrient management treatments during the years 2020-21, 2021-22 and on pooled basis. However, pooled analysis at 30 DATP showed significant result. Integrated nutrient management manifested their non-significant effect on leaf length and leaf width of rustica tobacco recorded at 30, 60 DATP and at harvest for the years 2020-21, 2021-22 and in pooled analysis under application of 75% RDF + 25% N from poultry manure (T₃), respectively. In case of dry weight per unit leaf area the result was found non-significant during both the years (2022-21 & 2021-22), but pooled analysis showed significant result in rustica tobacco. Cured leaf yield of rustica tobacco manifested significant result during both years (2022-21 & 2021-22) and in pooled analysis under application of 75% RDF + 25% N from poultry manure (T₃), respectively. In residual summer green gram plant height did not affected significantly due to integrated nutrient management treatments during years 2021, 2022 and on pooled basis. However, number of branches per plant and length of pods were found non-significant during both individual years (2021 and 2022) in residual summer green gram. Although, in pooled analysis number of branches per plant (5.39) and length of pods (8.21 cm) showed their significant influence in residual summer green gram under application of 50% RDF + 50% N from FYM (T₅). Whereas in yield parameters of residual summer green gram viz. number of pods per plant, number of seeds per pod, test weight and harvest index was found non-significant due to integrated nutrient management during both the years (2021 & 2022) and in pooled analysis. However, number of seeds per pod was found significant during pooled analysis. Seed and haulm yield of residual summer green gram was found significant due to various integrated nutrient management during both the individual years (2021 & 2022) and in pooled analysis under application of 50% RDF + 50% N from FYM (T₅). Interaction effect (Y x T) was found non-significant on all the growth parameters during the experiment.