Influence of organo-mineral fertilizer on soil acidity, phosphorus availability and potato yield after winter rice

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dc.contributor.advisorBorah, Nilay
dc.contributor.authorBorah, Rini
dc.date.accessioned2024-09-23T10:11:27Z
dc.date.available2024-09-23T10:11:27Z
dc.date.issued2023
dc.description.abstractA field experiment was conducted in ICR farm, AAU, Jorhat during November 2022 to February 2023 to assess the acidity and phosphorus availability in soil and yield of potato (Variety- Kufri Lalima) as influenced by organo-mineral fertilizer after winter rice. The experiment was conducted in a randomized block design (RBD) comprising individual plot size of 3 m X 3 m with three replications and seven treatments. The treatments included unfertilized plot, recommended doses (RD) of N:P2O5:K2O fertilizer @ 60:100:100 kg ha-1 (RDF) with farmyard manure (FYM) @ 5 t ha-1, RDF with FYM @ 2 t ha-1, RDF with vermicompost prepared substituting 30% of FYM by poultry litter (PLV) @ 2 t ha-1, RDN and 40% RD- PK with PLV @ 2 t ha-1, RDN and 60% RD- PK with PLV @ 2 t ha-1, RDN and 80% RD- PK with PLV @ 2 t ha-1. The PLV treatments were applied in two equal splits at planting and at 30 DAP as instant mixture with mineral fertilizers. The exchange acidity of soil was not influenced by nutrient management practices at 15, 30 and 45 days after planting of potato (DAP). RDF with PLV 2 t ha-1 significantly lowered the soil exchange acidity at 60 and 75 DAP over the unfertilized plot. The exchangeable H+ decreased at 45 and 60 DAP but exchangeable Al3+ was not affected by the treatments. The soil pH increased due to application of organo-mineral fertilizer at 15 and 45 DAP and decreased at 30, 60 and 75 DAP. The available phosphorus of fertilized soil was higher than initial value throughout the growth stages of potato. Application of RDF with FYM 5 t ha-1 or with PLV 2 t ha-1 significantly increased available P in soil at 15 and 30 DAP over RDF with FYM 2 t ha-1 and RDN + 40% RD-PK + PLV 2 t ha-1 instant mixture. The available phosphorus in soil increased at 30 DAP and decreased thereafter up to 75 DAP. The water extractable phosphorus showed similar trend as to available P at 15 and 30 DAP among the treatments. The water extractable P was relatively higher at 15 DAP and 45 DAP compared to other sampling dates, irrespective of the treatments. The available N and K content of soil increased with application of RDF with FYM 5 t ha-1 or with PLV 2 t ha-1 at stolon formation and tuber development stages. The plant growth, quality, yield attributing characters and yield of potato increased significantly with application of RDF with FYM 5 t ha-1 or with PLV 2 t ha-1. The nutrient content of tuber and haulm was not affected by the treatments. The total nutrient uptake by potato increased with application of organo- mineral fertilizer over the unfertilized plot. The soil pH, organic carbon, available P and K contents in soil after harvest of potato were significantly higher with fertilizer application compared to the unfertilized plot. The highest net benefit in terms of B:C ratio was observed with application of RDF with FYM 5 t ha-1 (1.72).
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810214815
dc.language.isoEnglish
dc.subSoil Sciences
dc.themeInfluence of organo- mineral fertilizer on soil acidity, phosphorus availability and potato yield after winter rice
dc.these.typeM.Sc
dc.titleInfluence of organo-mineral fertilizer on soil acidity, phosphorus availability and potato yield after winter rice
dc.typeThesis
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