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Evaluation of the potentiality of diverse weed species in mobilising soil bioavailable phosphorus
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The present study was carried out to assess the inorganic phosphorus (P)- dynamics under the rhizosphere of 10 weed species belonging to 8 different families. A fractionation study revealed that sol-P and Ca2-P were highest in M. denticulata L. and C. rotundus L. with 67.25 mg kg-1 and 48.37 mg kg-1, respectively (p<0.05) which could be attributed to high alkaline phosphatase activity in the rhizosphere. Out of the selected weed species, labile-P: nonlabile- P content was highest in M. denticulata L. (0.42) which is 38% higher than C. arvensis L. In terms of biomass and leaf P (%) C. didymus (L.) Sm. recoreded highest but, interestingly M. denticulata L. though had a higher sol-P but failed to translocate P-to the above and below-ground parts. Hence, M. denticulata L. being legume was an excellent mobilizer of non-labile P and can improve the available P for the subsequent crop.
Title: Evaluation of the potentiality of diverse weed species in mobilising soil bioavailable phosphorus
Description:
The present study was carried out to assess the inorganic phosphorus (P)- dynamics under the rhizosphere of 10 weed species belonging to 8 different families.
A fractionation study revealed that sol-P and Ca2-P were highest in M.
denticulata L.
and C.
rotundus L.
with 67.
25 mg kg-1 and 48.
37 mg kg-1, respectively (p<0.
05) which could be attributed to high alkaline phosphatase activity in the rhizosphere.
Out of the selected weed species, labile-P: nonlabile- P content was highest in M.
denticulata L.
(0.
42) which is 38% higher than C.
arvensis L.
In terms of biomass and leaf P (%) C.
didymus (L.
) Sm.
recoreded highest but, interestingly M.
denticulata L.
though had a higher sol-P but failed to translocate P-to the above and below-ground parts.
Hence, M.
denticulata L.
being legume was an excellent mobilizer of non-labile P and can improve the available P for the subsequent crop.
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