RELEASE OF NONEXCHANGEABLE POTASSIUM FROM DIFFERENT SIZE FRACTIONS OF2 HIGHLY K-FERTILIZED SOILS IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS CV DRAKKAR)

Authors
NIEBES JF DUFEY JE JAILLARD B HINSINGER P
Citation
Jf. Niebes et al., RELEASE OF NONEXCHANGEABLE POTASSIUM FROM DIFFERENT SIZE FRACTIONS OF2 HIGHLY K-FERTILIZED SOILS IN THE RHIZOSPHERE OF RAPE (BRASSICA-NAPUS CV DRAKKAR), Plant and soil, 156, 1993, pp. 403-406
Citations number
9
Categorie Soggetti
Agriculture Soil Science","Plant Sciences",Agriculture
Journal title
Plant and soil → ACNP
ISSN journal
0032079X
Volume
156
Year of publication
1993
Pages
403 - 406
Database
ISI
SICI code
0032-079X(1993)156:<403:RONPFD>2.0.ZU;2-R
Abstract
The release of nonexchangeable potassium by the different particle siz e fractions of two soils was studied with a culture device designed to confine soil samples in the rhizosphere of rape (Brassica napus cv Dr akkar). After 8 days of cropping, the contribution of nonexchangeable K to K uptake ranged from 50% in the fine clay to 80-100% in the coars er fractions. Due to their high supplying power and their relative abu ndance, the silt fractions provided a major part of the supply of K by these soils.