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Argyrolobium uniflorum Seedlings Respond Strongly to Small Doses of Phosphorus Consequences for Rehabilitating Degraded Arid Fallows in Presaharian Tunisia

Argyrolobium uniflorum Seedlings Respond Strongly to Small Doses of Phosphorus Consequences for Rehabilitating Degraded Arid Fallows in Presaharian Tunisia

Arid Land Research and Management 26(3): 261-269

In North African dryland research, few recognize that phosphorus (P) is the main soil nutrient limiting plant growth for legumes, in particular. P-fertilisation of legume reseedings could boost biological N-fixation and N-yield through enhanced biomass production, which, in turn, can benefit the re-establishment of resource-responsive perennial grasses. This is the hypothesis underlying a short-term fertilization experiment carried out with seedlings of Argyrolobium uniflorum, a native palatable legume. A secondary question was whether plant-available P, as measured by the Olsen method, is the best way to assess P-status in arid, calcareous, and nutrient-depleted soils that are renowned for their resource patchiness. show a significant effect of phosphorus addition on dry matter and N-yield. Seedlings responded to 25-kg P ha?1 by almost doubling dry matter production, yet no further improvement was observed for 50-kg P ha?The better plant growth corresponded with higher numbers of active nodule.

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Accession: 036583944

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DOI: 10.1080/15324982.2012.680653

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