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P-ISSN: 2618-060X, E-ISSN: 2618-0618   |   NAAS: 5.20

2024, Vol. 7, Special Issue 9

Effect of combined application of organic manures, biofertilizers and inorganic fertilizers on soil fertility after harvest of paddy


Kejiya P, Naga Madhuri KV, Sammi Reddy K, Naidu MVS, Navyajyothi K and Ramanamurthy B

A field experiment was conducted at college farm, S.V. Agricultural College, Tirupati, ANGRAU during kharif, 2022 to study the effect of integrated use of organic manures, biofertilizers and inorganic fertilizers on soil properties after harvest of paddy. The experiment was laid out in a split-plot design with seven main plots and three sub plots replicated thrice. The main plots comprised of different combination of organic manures and biofertilizers viz., M1: FYM @ 10 t ha-1 M2: Green manure seed (dhaincha) @ 25 kg ha-1), M3: FYM @ 5 t ha-1+ green manures seed @ 12.5 kg ha-1, M4: FYM@10 t ha-1+ Azospirillum + PSB + KRB @1.25 l ha-1 each, M5: green manure seed @ 25 kg ha-1 + Azospirillum + PSB + KRB @1.25 l ha-1 each, M6: FYM @ 5 t ha-1 + green manures @ 12.5 kg ha-1 + Azospirillum + + KRB @1.25 l ha-1 each and M7: Control. Sub-plots comprised of three levels of inorganic fertilizers viz., S1: 50% RDF, S2: 75% RDF and S3:100% RDF. The results revealed that the application of organic manures decreased the soil pH, increased EC and organic carbon over control. Application of chemical fertilizers has not influenced significantly the EC and organic carbon, but pH was significantly influenced by application of chemical fertilizers. Soil chemical properties viz., available nitrogen, phosphorus and potassium were significantly influenced by combined application of organic manures, biofertilizers and chemical fertilizers. Among the organic manure combinations, the highest soil available nitrogen, phosphorus and potassium were recorded with application of application of FYM @ 5 t ha-1 + green manure seed @ 12.5 kg ha-1 + Azospirillum + PSB + KRB @1.25 l ha-1 each (M6), which was statistically on par with the application of green manure seed @ 25 kg ha-1 + Azospirillum + PSB + KRB @1.25 l ha-1 each (M5) and FYM @ 10 t ha-1 + Azospirillum + PSB + KRB @1.25 l ha-1 each (M4) and the lowest were recorded in control (M7). However, among different levels of fertilizer, significantly the highest soil available nutrients were recorded with the application of 100% RDF (S3) followed by 75% RDF (S2) and the lowest were recorded in 50% RDF (S1). The interaction between various organic manures and different levels of inorganic fertilizers were found to be significant. Application of FYM @ 5 t ha-1 + green manure seed @ 12.5 kg ha-1 + Azospirillum + PSB + KRB @1.25 l ha-1 each along with application of 100% RDF (M6S3) recorded the highest soil available nutrients which was on par with M5S3, M6S2, M4S3, M5S2 and M6S1. The lowest was found in M7S1. It can be concluded that integrated application of organic manures, biofertilizers and inorganic fertilizers helps in increasing the availability of soil nutrients to crop apart from maintains soil organic carbon.
Pages : 923-927 | 221 Views | 108 Downloads
How to cite this article:
Kejiya P, Naga Madhuri KV, Sammi Reddy K, Naidu MVS, Navyajyothi K, Ramanamurthy B. Effect of combined application of organic manures, biofertilizers and inorganic fertilizers on soil fertility after harvest of paddy. Int J Res Agron 2024;7(9S):923-927. DOI: 10.33545/2618060X.2024.v7.i9Sm.1632
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