ISSN:
1573-5036
Keywords:
Brassica napus
;
Ca uptake
;
cation-anion balance
;
rock phosphate
;
split pot experiments
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Rape and sunflower were compared with respect to their rock phosphate mobilizing capacities, cationanion balance and uptake of Ca and NO3 at P-starvation. Rape was able to mobilize P from rock phosphate, whereas sunflower was not. When grown on a complete nutrient solution with NO3 as the only nitrogen source, both species took up more nutrient anions than cations. Withholding phosphate from the nutrient solution did not change the uptake pattern of rape, but sunflower took up more nutrient cations than anions at P-starvation, due to a strong decline in NO3 uptake. With both species, Ca uptake was not affected by phosphate in the nutrient solution. In split pot experiments, with rock phosphate supplied spatially separated from other nutrients, rape was still able to mobilize rock phosphate. A high Ca concentration had no effect on this capacity. The results indicated that in our experiments rock phosphate mobilization by rape was not associated with an excess of cation over anion uptake and neither with a high Ca uptake rate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02280175
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