Phosphorus budget and soil extractable dynamics in field crop rotations in mollisols
A better understanding of the P cycle is necessary to provide insights into management strategies that could enhance P bioavailability for crops. Our objectives were to evaluate the effects of continuous P fertilization on [i] the P budget, [ii] soil-extractable P [Pe] dynamics, and [iii] the relati...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2011Ciampitti.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Phosphorus budget and soil extractable dynamics in field crop rotations in mollisols |
| 520 | |a A better understanding of the P cycle is necessary to provide insights into management strategies that could enhance P bioavailability for crops. Our objectives were to evaluate the effects of continuous P fertilization on [i] the P budget, [ii] soil-extractable P [Pe] dynamics, and [iii] the relationship between these variables. Two crop rotations during a 6-yr period were analyzed in seven on-farm experiments: corn [Zea mays L.]-double cropped wheat [Triticum aestivum]/soybean [Glycine max [L.] Merr.] [C-W/S], and corn-soybean-double croppedwheat/ soybean [C-S-W/S]. Calculations of net P input considered only P removal [output] and fertilization [input]. Initial soil-test P was 13.4 mg P kg-1 [average for the four sites] for the C-W/S rotation and 37.9 mg P kg-1 for the C-S-W/S rotation [average for the three sites]. Treatment combinations were two annual rates: unfertilized and grain P removal estimation +10 percent [average 34 kg P ha-1 yr-1 ]. Not applying P to soils testing 45 to 68 mg kg-1 of initial Pe resulted in a steep Pe decline [slope 0.2 mg kg-1 per unit of negative P budget]. Nevertheless, soils with more than 25 mg kg-1 of initial Pe levels resulted in a very small and gradual decline [slope 0.02 mg kg-1 ]. Use of current P rates applied by local farmers probably results in a small soil-test P buildup with time. The P required to increase Pe by 1 mg P kg-1 was 11 and 8 kg P ha-1 yr-1 for the C-W/S and C-S-W/S rotations, respectively. | ||
| 653 | 0 | |a ANNUAL RATES | |
| 653 | 0 | |a CORN [ZEA MAYS L.] | |
| 653 | 0 | |a CROP ROTATION | |
| 653 | 0 | |a IN-FIELD | |
| 653 | 0 | |a MANAGEMENT STRATEGIES | |
| 653 | 0 | |a MOLLISOLS | |
| 653 | 0 | |a P REMOVAL | |
| 653 | 0 | |a P-CYCLES PER UNIT | |
| 653 | 0 | |a SOYBEAN [GLYCINE MAX [L.] MERR.] | |
| 653 | 0 | |a TRITICUM AESTIVUM | |
| 653 | 0 | |a AMINO ACIDS | |
| 653 | 0 | |a BIOCHEMISTRY | |
| 653 | 0 | |a BUDGET CONTROL | |
| 653 | 0 | |a CROPS | |
| 653 | 0 | |a GRAIN [AGRICULTURAL PRODUCT] | |
| 653 | 0 | |a NITROGEN FIXATION | |
| 653 | 0 | |a PHOSPHORUS | |
| 653 | 0 | |a SOIL MECHANICS | |
| 653 | 0 | |a SOIL TESTING | |
| 653 | 0 | |a SOILS | |
| 653 | 0 | |a ROTATION | |
| 653 | 0 | |a BIOAVAILABILITY | |
| 653 | 0 | |a CROP ROTATION | |
| 653 | 0 | |a DOUBLE CROPPING | |
| 653 | 0 | |a FARMERS ATTITUDE | |
| 653 | 0 | |a FERTILIZER APPLICATION | |
| 653 | 0 | |a MAIZE | |
| 653 | 0 | |a MANAGEMENT PRACTICE | |
| 653 | 0 | |a MOLLISOL | |
| 653 | 0 | |a PHOSPHORUS | |
| 653 | 0 | |a SOIL DYNAMICS | |
| 653 | 0 | |a SOIL TEST | |
| 653 | 0 | |a SOYBEAN | |
| 653 | 0 | |a WHEAT | |
| 653 | 0 | |a GLYCINE MAX | |
| 653 | 0 | |a TRITICUM AESTIVUM | |
| 653 | 0 | |a ZEA MAYS | |
| 700 | 1 | |9 46012 |a Ciampitti, Ignacio Antonio | |
| 700 | 1 | |9 9707 |a García, Fernando Oscar | |
| 700 | 1 | |9 39800 |a Picone, Liliana Inés | |
| 700 | 1 | |9 6390 |a Rubio, Gerardo | |
| 773 | |t Soil Science Society of America Journal |g Vol.75, no.1 (2011), p.131-142 | ||
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| 900 | |a ^tPhosphorus budget and soil extractable dynamics in field crop rotations in mollisols | ||
| 900 | |a ^aCiampitti^bI.A. | ||
| 900 | |a ^aGarcía^bF.O. | ||
| 900 | |a ^aPicone^bL.I. | ||
| 900 | |a ^aRubio^bG. | ||
| 900 | |a ^aCiampitti^bI. A. | ||
| 900 | |a ^aGarcía^bF. O. | ||
| 900 | |a ^aPicone^bL. I. | ||
| 900 | |a ^aRubio^bG. | ||
| 900 | |a ^aCiampitti^bI.A.^tInternational Plant Nutrition Institute, Latin America Southern Cone, Av. Santa Fe 910 [B1641 ABO], Acassuso, Buenos Aires, Argentina | ||
| 900 | |a ^aGarcÃa^bF.O.^tAgronomy Dep, Purdue Univ., 915 W. State St, West Lafayette, IN 47907-2054, United States | ||
| 900 | |a ^aPicone^bL.I.^tFCA-INTA Balcarce, Mar Del Plata National Univ., CC 276, 7620 Balcarce, Buenos Aires, Argentina | ||
| 900 | |a ^aRubio^bG.^tAgricultural College, INBA Univ. of Buenos Aires, Av. San Martin 4453, C1417DSE, Buenos Aires, Argentina | ||
| 900 | |a ^tSoil Science Society of America Journal^cSoil Sci. Soc. Am. J. | ||
| 900 | |a en | ||
| 900 | |a 131 | ||
| 900 | |a ^i | ||
| 900 | |a Vol. 75, no. 1 | ||
| 900 | |a 142 | ||
| 900 | |a ANNUAL RATES | ||
| 900 | |a CORN [ZEA MAYS L.] | ||
| 900 | |a CROP ROTATION | ||
| 900 | |a IN-FIELD | ||
| 900 | |a MANAGEMENT STRATEGIES | ||
| 900 | |a MOLLISOLS | ||
| 900 | |a P REMOVAL | ||
| 900 | |a P-CYCLES PER UNIT | ||
| 900 | |a SOYBEAN [GLYCINE MAX [L.] MERR.] | ||
| 900 | |a TRITICUM AESTIVUM | ||
| 900 | |a AMINO ACIDS | ||
| 900 | |a BIOCHEMISTRY | ||
| 900 | |a BUDGET CONTROL | ||
| 900 | |a CROPS | ||
| 900 | |a GRAIN [AGRICULTURAL PRODUCT] | ||
| 900 | |a NITROGEN FIXATION | ||
| 900 | |a PHOSPHORUS | ||
| 900 | |a SOIL MECHANICS | ||
| 900 | |a SOIL TESTING | ||
| 900 | |a SOILS | ||
| 900 | |a ROTATION | ||
| 900 | |a BIOAVAILABILITY | ||
| 900 | |a CROP ROTATION | ||
| 900 | |a DOUBLE CROPPING | ||
| 900 | |a FARMERS ATTITUDE | ||
| 900 | |a FERTILIZER APPLICATION | ||
| 900 | |a MAIZE | ||
| 900 | |a MANAGEMENT PRACTICE | ||
| 900 | |a MOLLISOL | ||
| 900 | |a PHOSPHORUS | ||
| 900 | |a SOIL DYNAMICS | ||
| 900 | |a SOIL TEST | ||
| 900 | |a SOYBEAN | ||
| 900 | |a WHEAT | ||
| 900 | |a GLYCINE MAX | ||
| 900 | |a TRITICUM AESTIVUM | ||
| 900 | |a ZEA MAYS | ||
| 900 | |a A better understanding of the P cycle is necessary to provide insights into management strategies that could enhance P bioavailability for crops. Our objectives were to evaluate the effects of continuous P fertilization on [i] the P budget, [ii] soil-extractable P [Pe] dynamics, and [iii] the relationship between these variables. Two crop rotations during a 6-yr period were analyzed in seven on-farm experiments: corn [Zea mays L.]-double cropped wheat [Triticum aestivum]/soybean [Glycine max [L.] Merr.] [C-W/S], and corn-soybean-double croppedwheat/ soybean [C-S-W/S]. Calculations of net P input considered only P removal [output] and fertilization [input]. Initial soil-test P was 13.4 mg P kg-1 [average for the four sites] for the C-W/S rotation and 37.9 mg P kg-1 for the C-S-W/S rotation [average for the three sites]. Treatment combinations were two annual rates: unfertilized and grain P removal estimation +10 percent [average 34 kg P ha-1 yr-1 ]. Not applying P to soils testing 45 to 68 mg kg-1 of initial Pe resulted in a steep Pe decline [slope 0.2 mg kg-1 per unit of negative P budget]. Nevertheless, soils with more than 25 mg kg-1 of initial Pe levels resulted in a very small and gradual decline [slope 0.02 mg kg-1 ]. Use of current P rates applied by local farmers probably results in a small soil-test P buildup with time. The P required to increase Pe by 1 mg P kg-1 was 11 and 8 kg P ha-1 yr-1 for the C-W/S and C-S-W/S rotations, respectively. | ||
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