Organic amendments affect soil parameters in two long-term rice-wheat experiments

Simple item page
cg.contributor.affiliationInternational Rice Research Instituteen
cg.contributor.affiliationNational Wheat Research Program, Nepalen
cg.contributor.affiliationPunjab Agricultural Universityen
cg.contributor.affiliationChiba Universityen
cg.identifier.doihttps://doi.org/10.2136/sssaj2006.0141en
cg.issn0361-5995en
cg.issue2en
cg.journalSoil Science Society of America Journalen
cg.volume71en
dc.contributor.authorTirol-Padre, A.en
dc.contributor.authorLadha, J.K.en
dc.contributor.authorRegmi, A.P.en
dc.contributor.authorBhandari, A.L.en
dc.contributor.authorInubushi, K.en
dc.date.accessioned2024-12-19T12:56:20Zen
dc.date.available2024-12-19T12:56:20Zen
dc.identifier.urihttps://hdl.handle.net/10568/166481
dc.titleOrganic amendments affect soil parameters in two long-term rice-wheat experimentsen
dcterms.abstractThe impacts of continuous applications of an organic manure (farmyard manure [FYM], green manure [GM], and wheat straw [WS]) combined with inorganic fertilizers (N, P, and K) on soil parameters and productivity of rice (Oryza sativa L.)–wheat (Triticum aestivum L.) systems were investigated in two long‐term experiments under conventional tillage in Ludhiana, India, and Bhairahawa, Nepal. Changes in total and labile soil C and N, and microbiological parameters relative to unfertilized and inorganically fertilized controls were measured. Organic amendments had positive but variable effects. In Ludhiana, FYM application increased total C and N, permanganate‐oxidizable C, and hot‐water‐extractable C (HWEC) by 40 to 70% relative to the control after 20 yr and maintained HWEC and total N with time. In the other treatments, HWEC and total N showed declining trends with time, whereas total C increased by 17% on average. In Bhairahawa, although total organic C and N increased with organic amendments after 15 yr, HWEC did not. Increases in C and N, respectively, as fractions of the applied organic fertilizers were 11 to 23 and 37 to 39% from FYM, 4 to 21 and 19 to 41% from GM, and 3 and 24% from WS. The FYM improved available P, cation exchange capacity, potential mineralizable N, and dehydrogenase activity, but microbial biomass C, basal respiration, flush of CO2 after rewetting dried soil, and metabolic quotient remained unchanged. The current practice of inorganic fertilization alone cannot maintain the soil quality needed to sustain crop productivity. Amounts of organic manures to supplement inorganic fertilizers must be optimized to increase C and N accumulations in the soil without negative effects on crop yield.en
dcterms.available2007-03
dcterms.bibliographicCitationTirol-Padre, A.; Ladha, J. K.; Regmi, A. P.; Bhandari, A. L. and Inubushi, K. 2007. Organic amendments affect soil parameters in two long-term rice-wheat experiments. Soil Science Soc of Amer J, Volume 71 no. 2 p. 442-452en
dcterms.extentpp. 442-452en
dcterms.issued2007-03
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherWileyen
dcterms.subjectbiological activity in soilen
dcterms.subjectcarbon dioxideen
dcterms.subjectfarmyard manureen
dcterms.subjectgreen manuresen
dcterms.subjectnitrogen fertilizersen
dcterms.subjectorganic amendmentsen
dcterms.subjectoxidoreductasesen
dcterms.subjectphosphorus fertilizersen
dcterms.subjectpotassium fertilizersen
dcterms.subjectsoil amendmentsen
dcterms.subjectsoil fertilityen
dcterms.subjectindiaen
dcterms.subjectnepalen
dcterms.typeJournal Article

Files

Collections

IRRI Journal Articles