INTEGRATED NUTRIENT MANAGEMENT IN CLUSTERBEAN (Cyamopsis tetragonoloba L.Taubert)

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dc.contributor.advisorPADMAJA, G
dc.contributor.authorPRABHAVATHI, M
dc.date.accessioned2016-09-08T14:49:03Z
dc.date.available2016-09-08T14:49:03Z
dc.date.issued2014
dc.description.abstractA field experiment entitled “Integrated Nutrient Management in Clusterbean (Cyamopsis tetragonoloba L. Taubert)” was conducted during kharif, 2013 at College Farm, College of Agriculture, Rajendranagar, Hyderabad, Andhra Pradesh. The soil of the experimental site was sandy loam with a pH of 8.02 and the electrical conductivity was found to be 0.178 dS m-1. The soil had low organic carbon (0.36%), available nitrogen (198.3 kg ha-1) and available phosphorus (21.4 kg P2O5 ha- 1) and high available potassium (565.5 kg K2O ha-1). The experiment was laid out in Randomized Block Design with ten treatments replicated thrice. The treatments were T1 (Absolute control), T2 (100% RDN through urea), T3 (50% RDN through urea + 50% RDN through FYM), T4 (50% RDN through urea + 25% RDN through FYM + Rhizobium), T5 (50% RDN through urea + 25% RDN through FYM + Rhizobium + PSB), T6 (100% RDN through FYM + PSB), T7 (100% RDN through FYM +Rhizobium + PSB), T8 (Rhizobium + PSB), T9 (Rhizobium) and T10 (PSB). The observations on dry matter production were recorded at vegetative, flowering and harvesting stages. Soil samples at initial, vegetative, flowering and at harvest were analysed for pH, EC, OC, available N, P2O5, K2O, and assayed for soil enzyme activity (dehydrogenase, urease, acid and alkaline phosphatase). Plant samples were analysed for N, P and K at vegetative (30DAS), flowering (60DAS) and harvesting stages (90DAS) and nutrient uptake was computed. The oven dried pods were analysed for per cent protein content. The results of the experiment showed that the performance of clusterbean crop improved significantly with integrated use of organic manures, inorganic fertilizers and biofertilizers. The dry matter production, number of pods per plant and pod yield was highest with the application of 50% RDN through urea + 25% RDN through FYM + Rhizobium + PSB (T5). Among the treatments, highest pod yield (47.89 q ha-1), number of pods per plant (107.75) was recorded in T5 followed by T2. Nitrogen uptake, per cent protein content, available nitrogen content in soil were highest in T2 (100% RDN through urea) followed by T5, but the values were on par with each other. Available phosphorus content in soil was more in the treatments having PSB inoculation and the highest values were recorded in T7 and phosphorus uptake was highest in T5. With regard to changes in soil available nutrient status from initial to harvest (0-90DAS), there was an increase in available N, P2O5, K2O in all the integrated treatments along with T2 (100% RDN). Soil dehydrogenase activity and urease activity were found highest with treatment T7 (100% RDN through FYM + Rhizobium + PSB) followed by T6. Highest acid and alkaline phosphatase activity in soil at different growth stages was recorded with the treatment T3 followed by T7 and the values were on par with each other. The benefit-cost ratio of T2 (1.62) was highest, closely followed by T5 (1.36), T4 (1.13) and T3 (0.94). Based on the results of this study and keeping in view the soil health, and to sustain the productivity of clusterbean and also to improve soil biological activity it can be concluded that integrated use of 50% RDN through urea + 25% RDN through FYM + Rhizobium + PSB application is the best option which also helps in maintenance of soil fertility.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/76113
dc.language.isoenen_US
dc.publisherACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABADen_US
dc.relation.ispartofseriesD9673;
dc.subSoil Science and Agricultural Chemistry
dc.subjectINTEGRATED, NUTRIENT, MANAGEMENT, CLUSTER BEANen_US
dc.these.typeM.Sc
dc.titleINTEGRATED NUTRIENT MANAGEMENT IN CLUSTERBEAN (Cyamopsis tetragonoloba L.Taubert)en_US
dc.typeThesisen_US
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