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Fresh and residual phosphorus uptake by ryegrass from soils with different fertilization histories

Oberson, Astrid; Tagmann, Hans U.; Langmeier, Monika; Dubois, David; Mäder, Paul and Frossard, Emmanuel (2010) Fresh and residual phosphorus uptake by ryegrass from soils with different fertilization histories. Plant and Soil, 334, pp. 391-407.

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Organic farming largely depends on animal manure as a source of phosphorus (P) and the recycling of animal manure globally is becoming increasingly important. In a pot experiment, using radioactive P labeling techniques, we studied ryegrass uptake of P applied with animal manure and water soluble mineral fertilizer to soils that had been cropped for 22 years according to organic or conventional farming practices. The soils differed in P status and microbial activity. Labeling soil-available P also allowed assessing the uptake from residual P that remained in the soils because of their different fertilization histories. On each soil, recovery of fresh manure P in four harvests of ryegrass shoots was lower than recovery of mineral P. It ranged from 24% to 35% for manure P and from 37% to 43% for mineral P. Recovery of fresh manure P was affected by soil-available P contents. It was lower at a higher available P in a conventional soil. Different levels in microbial activity among soils were of lesser importance for the recovery of fresh manure P in plants. The recovery of residual P ranged from9%to 15%. Residual P contained in organic cropped soils contributed less to P nutrition of ryegrass than the residual P contained in conventional cropped soils, probably due to their lower residual P contents being composed of stable P forms. The indirect isotope dilution technique is useful in assessing manure P uptake by plants, but attention must be given to added P interactions, i.e., the potential impact of organic amendments on P uptake from nonlabeled soil and residual P.

EPrint Type:Journal paper
Keywords:Fertilisation, ryegrass , Soil Sciences, Bodenwissenschaften
Agrovoc keywords:
Animal manure
Isotope techniques
Phosphorus uptake
Organic and conventional farming
Subjects: Soil > Nutrient turnover
Research affiliation: Switzerland > Agroscope > ART - Reckenholz location
Switzerland > ETHZ - Agrarwissenschaften
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil
Switzerland > Other organizations Switzerland
Deposited By: Grand, Mr Gregor
ID Code:25683
Deposited On:16 Apr 2014 08:10
Last Modified:13 Jul 2023 09:43
Document Language:English
Refereed:Peer-reviewed and accepted

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