Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol
The contribution of indigenous arbuscular mycorrhiza (AM) on phosphorus (P) uptake by groundnut was examined in a low P field soil. The fungicide benomyl was applied to eradicate mycorrhizal infection. The treatments consisted of three P levels viz. 0, 50 and 400 mg P kg-1 soil, with and without ben...
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University of Ljubljana Press (Založba Univerze v Ljubljani)
2008-09-01
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| Series: | Acta Agriculturae Slovenica |
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| Online Access: | https://journals.uni-lj.si/aas/article/view/15411 |
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| author | Amitava RAKSHIT P.B.S. BHADORIA |
| author_facet | Amitava RAKSHIT P.B.S. BHADORIA |
| author_sort | Amitava RAKSHIT |
| collection | DOAJ |
| description | The contribution of indigenous arbuscular mycorrhiza (AM) on phosphorus (P) uptake by groundnut was examined in a low P field soil. The fungicide benomyl was applied to eradicate mycorrhizal infection. The treatments consisted of three P levels viz. 0, 50 and 400 mg P kg-1 soil, with and without benomyl application. Groundnut as test crop was sown two weeks after the application of benomyl and was harvested four times covering the whole growth period. At each harvest, the shoot yield, shoot P concentration, root length, soil solution P (CLi) and per cent root infection by AM was determined for benomyl treated and untreated soil at all P levels. Benomyl showed no effect on soil solution P concentration. When P was limiting, application of benomyl did reduce early groundnut growth by 40-50% at P-0, and by 25-30% at P-50. At high P supply (P-400), benomyl had little or no effect on dry matter production. Thus, indicate that the effect of benomyl on plant growth was by its influence on P uptake from soil. Phosphorus supply affected percentage of root infected by AM which was 40% of the roots at P-0, and decreased to around 30% and 10% at P-50 and P-400. In the early growing season, the P influx of maize was dependent on P in soil solution and the effect of AM was rather large. At high P supply, the contribution of AM to P influx showed a decrease. Without or low AM infection and at low P level, the P influx was 62% of that with AM. During early growth period groundnut showed a similar behaviour as maize at middle growth stage and without AM reduction of P influx, which was to an extent of 67%. In absolute terms AM is more important at maximum growth in the early growth season for groundnut. It is evident from the present investigation that AM may make an significant contribution by about 35 % to the P nutrition of groundnut, but other factors, like P solubilization by root exudates, may be even more important. |
| format | Article |
| id | doaj-art-0d203f0387ba46baabca10be320c75ee |
| institution | DOAJ |
| issn | 1854-1941 |
| language | English |
| publishDate | 2008-09-01 |
| publisher | University of Ljubljana Press (Založba Univerze v Ljubljani) |
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| spelling | doaj-art-0d203f0387ba46baabca10be320c75ee2025-08-20T02:52:56ZengUniversity of Ljubljana Press (Založba Univerze v Ljubljani)Acta Agriculturae Slovenica1854-19412008-09-0191239740610.14720/aas.2008.91.2.1541121804Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an OxisolAmitava RAKSHIT0P.B.S. BHADORIA1Department of Soil Science and Agril Chemistry, Institute of Agricultural Science, BHU, Varanasi,221005, UP, IndiaDepartment of Agricultural and Food Engineering, Indian Institute of Technology Kharagpur 721 302, IndiaThe contribution of indigenous arbuscular mycorrhiza (AM) on phosphorus (P) uptake by groundnut was examined in a low P field soil. The fungicide benomyl was applied to eradicate mycorrhizal infection. The treatments consisted of three P levels viz. 0, 50 and 400 mg P kg-1 soil, with and without benomyl application. Groundnut as test crop was sown two weeks after the application of benomyl and was harvested four times covering the whole growth period. At each harvest, the shoot yield, shoot P concentration, root length, soil solution P (CLi) and per cent root infection by AM was determined for benomyl treated and untreated soil at all P levels. Benomyl showed no effect on soil solution P concentration. When P was limiting, application of benomyl did reduce early groundnut growth by 40-50% at P-0, and by 25-30% at P-50. At high P supply (P-400), benomyl had little or no effect on dry matter production. Thus, indicate that the effect of benomyl on plant growth was by its influence on P uptake from soil. Phosphorus supply affected percentage of root infected by AM which was 40% of the roots at P-0, and decreased to around 30% and 10% at P-50 and P-400. In the early growing season, the P influx of maize was dependent on P in soil solution and the effect of AM was rather large. At high P supply, the contribution of AM to P influx showed a decrease. Without or low AM infection and at low P level, the P influx was 62% of that with AM. During early growth period groundnut showed a similar behaviour as maize at middle growth stage and without AM reduction of P influx, which was to an extent of 67%. In absolute terms AM is more important at maximum growth in the early growth season for groundnut. It is evident from the present investigation that AM may make an significant contribution by about 35 % to the P nutrition of groundnut, but other factors, like P solubilization by root exudates, may be even more important.https://journals.uni-lj.si/aas/article/view/15411oxisolbenomylarbuscular mycorrhizagroundnutsolution concentrationp uptakeroot length |
| spellingShingle | Amitava RAKSHIT P.B.S. BHADORIA Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol Acta Agriculturae Slovenica oxisol benomyl arbuscular mycorrhiza groundnut solution concentration p uptake root length |
| title | Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol |
| title_full | Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol |
| title_fullStr | Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol |
| title_full_unstemmed | Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol |
| title_short | Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol |
| title_sort | indigenous arbuscular mycorrhiza is more important for early growth period of groundnut arachis hypogea l for p influx in an oxisol |
| topic | oxisol benomyl arbuscular mycorrhiza groundnut solution concentration p uptake root length |
| url | https://journals.uni-lj.si/aas/article/view/15411 |
| work_keys_str_mv | AT amitavarakshit indigenousarbuscularmycorrhizaismoreimportantforearlygrowthperiodofgroundnutarachishypogealforpinfluxinanoxisol AT pbsbhadoria indigenousarbuscularmycorrhizaismoreimportantforearlygrowthperiodofgroundnutarachishypogealforpinfluxinanoxisol |