CHANGES OF pH AND AVAILABLE PHOSPHORUS AND CALCIUM IN RHIZOSPHERE OF ALUMINUM-TOLERANT MAIZE GERMPLASM FERTILIZED WITH PHOSPHATE ROCK

Fernández, Shirley; Lizaso, Jon

doi:10.1081/css-100104212

Cited by 10 publications

(8 citation statements)

References 40 publications

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“…He obtained an increase in pH of 0.14-0.38 unit as a consequence of the release of P and Ca from rock phosphate. These increases in pH obtained by Ramirez et al (2001) were comparable to increase in pH obtained in our study with sole lime application.…”

Section: Discussionsupporting

confidence: 94%

“…The Ebolowa soil was probably more acidic than the soil used by Osei (1995) and had higher P fixation capacity. Ramirez et al (2001) examined the effect of aluminium tolerant maize genotypes on rhizosphere pH. He obtained an increase in pH of 0.14-0.38 unit as a consequence of the release of P and Ca from rock phosphate.…”

Section: Discussionmentioning

confidence: 99%

“…However, this reduction did not induce any increase in soil pH. Ramirez et al (2001) examined the effects of aluminium-tolerant maize genotypes on rhizosphere pH and the consequence release of P and Ca from phosphate rock (PR). Results indicated that where PR was applied, rhizosphere pH increased between 0.14 and 0.38 pH units as a consequence of the increase in Ca concentration from the dissolution of PR.…”

Section: Introductionmentioning

confidence: 99%

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Responses of maize grain yield to changes in acid soil characteristics after soil amendments

et al. 2006

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An experiment was conducted from 1997 to 2000 on an acid soil in Cameroon to assess the effectiveness of cultivating acid tolerant maize (Zea mays L.) cultivar and the use of organic and inorganic fertilizers as options for the management of soil acidity. The factors investigated were: phosphorus (0 and 60 kg ha )1 ), dolomitic lime (0 and 2 t ha )1 ), organic manure (no manure, 4 t ha )1 poultry manure, and 4 t ha )1 of leaves of Senna spectabilis), and maize cultivars (ATP-SR-Y -an acid soil-tolerant, and Tuxpen˜o sequiaan acid susceptible).On acid soil, maize grain yield of ATP-SR-Y was 61% higher than the grain yield of Tuxpen˜o sequia. Continuous maize cultivation on acid soil further increased soil acidity, which was manifested by a decrease in pH (0.23 unit), exchangeable Ca (31%) and Mg (36%) and by an increase in exchangeable Al (20%). Yearly application of 60 kg ha )1 of P for 3 years increased soil acidity through increases in exchangeable Al (8%) and H (16%) and a decrease in exchangeable Ca (30%), Mg (11%) and pH (0.07 unit). Lime application increased grain yield of the tolerant (82%) and susceptible (208%) cultivars. The grain yield increases were associated with a mean decrease of 43% in exchangeable Al, and 51% in H, a mean increase of 0.27 unit in pH, 5% in CEC, 154% in exchangeable Ca, and 481% in Mg contents of the soil. Poultry manure was more efficient than leaves of Senna producing 38% higher grain yield. This yield was associated with increases in pH, Ca, Mg and P, and a decrease in Al. The highest mean grain yields were obtained with lime added to poultry manure (4.70 t ha )1 ) or leaves of Senna (4.72 t ha )1 ).Grain yield increase was more related to the decrease in exchangeable Al (r=)0.86 to )0.95, P<0.01) and increase in Ca (r=0.78-0.94, P<0.01), than to pH (r=)0.57 (non-significant) to )0.58 (P<0.05)). Exchangeable Al was the main factor determining pH (r=)0.88 to )0.92, P<0.01).The yield advantage of the acid tolerant cultivar was evident even after correcting for soil acidity. Acid soil-tolerant cultivars are capable of bringing unproductive acid soils into cultivation on the short run. The integration of soil amendments together with acid soil-tolerant cultivar offers a sustainable and comprehensive strategy for the management of acid soils in the tropics.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of maize grain yield to changes in acid soil characteristics after soil amendments

et al. 2006

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“…The greater efficiency of legumes to acquire P from PR was related to their ability to acidify the rizosphere (Aguilar and van Diest 1981;Bekele et al 1983). Ramirez, Fernandez, and Lizaso (2001) shown that aluminum (Al)-tolerant maize was able to acidify the rizosphere and improve P acquisition from PR. Vesicular arbuscular mycorrhizal (VAM) fungi are known to form symbiosis with different plant species and often enhance P uptake of their associated plants in P-limited soils (Barea 1991).…”

Section: Introductionmentioning

confidence: 99%

Mycorrhiza Effect on Maize P Uptake from Phosphate Rock and Superphosphate

Mendoza

Lizaso

2009

Communications in Soil Science and Plant Analysis

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Low available phosphorus (P) is a serious constraint for crop production in acidic tropical soils. Economical yields in these environments require application of large amounts of costly nitrogen (N) and P fertilizers. Although phosphate rock (PR) has been proposed as a less expensive P source, the slow P release to the soil limits its use for annual crops. The objective of this work was to examine the effect of inoculating a nonsterile acidic soil with vesicular arbuscular mycorrhizal (VAM) Gigaspora margarita on PR dissolution and P uptake by aluminum (Al)-tolerant maize inbreds. Three maize inbreds from CIMMYT, at Cali, Colombia, ranked as Al-tolerant and one local breed ranked as Al-susceptible were seeded in 4-kg pots filled with a soil of pH 4.1 and 2.5 mg kg 21 available P. Inoculants (Gigaspora margarita and indigenous VAM), P fertilizer (Riecito phosphate rock and triple superphosphate), and the four inbreds were arrainged in a factorial design (2 6 2 6 4) with four replications. Plants were harvested 35 days after seeding, and P was determined in shoots. Four 2.5-cm-diameter soil cores were obtained from each pot to determine root length (two cores), root colonization (one core), and available P (one core). The inoculation with Gigaspora margarita caused a reduction in root length but better root colonization, 55% increase in P uptake, and 27% increase in shoot growth. When PR was used as fertilizer, plant growth was reduced in both roots and shoots. However, when PR was used in the presence of Gigaspora margarita, 2058 inbreds had 13% longer roots and shoot growth was the same as shoots fertilized with triple superphosphate. Our data suggest that inbreds exhibit different abilities to acquire P from PR under the influence of Gigaspora margarita fungi.

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“…Such phosphates require low pH values and P and Ca soil sinks to favor their dissolution and P availability (Robinson and Syers, 1990;Sanyal and Datta, 1991). Nevertheless, the soil characteristics that favor RP dissolution may be limiting factors for plant development and, for this reason, many studies have been made on the micro region of the soil that may present characteristics desirable for RP dissolution due to plant development -the rhizosphere (Hinsinger and Gilkes, 1995;Pearse et al, 2007;Perez et al, 2007;Ramirez et al, 2001;Zoysa et al, 1997Zoysa et al, , 1998. The alterations caused in the rhizospheric soil attributes vary according to the cultivated plant species (Bertrand et al, 1999;Gilkes, 1996, 1997;Morel and Hinsiger, 1999;Pearse et al, 2006Pearse et al, , 2007.…”

Section: Introductionmentioning

confidence: 99%

Rhizosphere pH and phosphorus forms in an Oxisol cultivated with soybean, brachiaria grass, millet and sorghum

Schoninger¹,

Gatiboni²,

Ernani³

2012

Sci. agric. (Piracicaba, Braz.)

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days of cultivation, the soil was divided into the layers of 0-1, 1-2, 2-3, 3-4, 4-5, 5-7, 7-9, and 9-14 mm from the rhizoplane and air dried to determine pH and P contents through Hedley fractionation.In the 1-2 and 2-3 mm layers, soybean cultivation caused an increase in pH when compared to the control treatment (without plants). In the other layers, there were no alterations in pH due to cultivation of plants. The cultivation of millet, brachiaria grass, and sorghum reduced the inorganic P content in the most labile forms only in the 0-1 mm layer from the rhizoplane.

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CHANGES OF pH AND AVAILABLE PHOSPHORUS AND CALCIUM IN RHIZOSPHERE OF ALUMINUM-TOLERANT MAIZE GERMPLASM FERTILIZED WITH PHOSPHATE ROCK

Cited by 10 publications

References 40 publications

Responses of maize grain yield to changes in acid soil characteristics after soil amendments

Responses of maize grain yield to changes in acid soil characteristics after soil amendments

Mycorrhiza Effect on Maize P Uptake from Phosphate Rock and Superphosphate

Rhizosphere pH and phosphorus forms in an Oxisol cultivated with soybean, brachiaria grass, millet and sorghum

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