Journalartikel

Jahr der Veröffentlichung: 1984

Seiten: 92-95

Zeitschrift: Soil Science Society of America Journal

Bandnummer: 48

Heftnummer: 1

ISSN: 0361-5995

eISSN: 1435-0661

DOI Link: https://doi.org/10.2136/sssaj1984.03615995004800010017x

Verlag: Wiley

Abstract: 
As soil test data for available P are often unsatisfactory, it was investigated whether the integration of the P buffer power of soils would improve the information from soil tests. The P buffer power of 8 soils differing widely in their characteristics was assessed by plotting the calcium-lactate exchangeable P (P quantity) vs. the electro-ultrafiltration extractable P (P intensity). After dressing these soils with increasing amounts of soluble phosphate, they were analyzed for available P after an incubation period of 1 wk by extracting P using electro-ultrafiltration (EUF-P) and calcium-lactate (CAL-P). The P concentration in the tops and the P uptake of young rye (S. cereale L.) plants grown on these soils in pots supplied with 5 increasing P rates were correlated with the EUF-P and CAL-P soil test data. Significant and highly significant correlations between soil test and the P uptake and soil test and P concentration in rye seedlings, respectively, were obtained. These correlations were further much improved when the P buffer power of soils was integrated into the computation in the form of a multiple regression analysis. The R2 thus obtained was about 0.8, showing that about 80% of the variance in P uptake and P concentration in plant tops can be related to the variance in the P soil tests data (CAL or EUF technique) and to the variance of the P buffer power of soils. Soil tests for available soil P can be substantially improved by taking into consideration the P buffer power of soils.

Harvard-Zitierstil: NAIR, K. and MENGEL, K. (1984) IMPORTANCE OF PHOSPHATE BUFFER POWER FOR PHOSPHATE-UPTAKE BY RYE, Soil Science Society of America Journal, 48(1), pp. 92-95. https://doi.org/10.2136/sssaj1984.03615995004800010017x

APA-Zitierstil: NAIR, K., & MENGEL, K. (1984). IMPORTANCE OF PHOSPHATE BUFFER POWER FOR PHOSPHATE-UPTAKE BY RYE. Soil Science Society of America Journal. 48(1), 92-95. https://doi.org/10.2136/sssaj1984.03615995004800010017x