Record Details

Plant available phosphorus in homegarden and native forest soils under high rainfall in an equatorial humid tropics

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Plant available phosphorus in homegarden and native forest soils under high rainfall in an equatorial humid tropics
Not Available
 
Creator C. B. Pandey
R. C. Srivastava
 
Subject Agroforestry . Extractable P. Gravelly-sandy-loamy soil . High rainfall . Moist-evergreen forest . Water filled pore space
 
Description Not Available
Though the affinity of iron oxides and
hydroxides for phosphorus (P) is thought to limit
growth and productivity of plants on iron-rich
acidic soils in humid tropical climate, tall trees are
found in tropical rainforests, and vigorous growth
occurs in herbaceous vegetation in the humid
tropical climate of the Andamans. Our study reports
how high rainfall influences Bray and Kurtz P-1
extractable P, water filled pore space (WFPS),
microbial biomass carbon (MB-C) and phosphorus
(MB-P) in the gravelly-sandy-loamy soils in three
major land use systems: moist-evergreen forest,
semi-evergreen forest and homegarden, in the
equatorial humid tropical climate of South Andaman island of India. In addition, an ex-situ
experiment investigated how labile carbon (glucose)
under different soil-water regimes [25% field
capacity (FC) and 100% FC] affected the P in the
soils under the land use systems. WFPS, across the
land use systems, was more than two times higher
during the high rainfall than dry spell (72–80 hr
after the high rainfall). The extractable P, across the
land use systems, increased about 5 to 6 fold
during the high rainfall than dry spell. The increase
was the highest in the homegarden and lowest in
moist-evergreen forest. The extractable P was
positively correlated with the WFPS. MB-C and
MB-P were lower during the high rainfall than dry
spell in all the land use systems. In the ex-situ
experiment, the extractable P increased 1.4 to 1.7
fold more in water (100% FC) + glucose than
water (100% FC) alone treatment. Water at 25% FC
did not increase the extractable P in the soils under
all the land use systems. After cessation of the high
rainfall, WFPS declined quickly within 2-hr in the
upper layer (0–5 cm) of the soils. These indicate
that the high rainfall together with labile carbon
increases the extractable P through anaerobiosis,
whereas, quick decline in the WFPS (0–5 cm)
following cessation of the high rainfall helps its
uptake by plants and microflora.
Not Available
 
Date 2019-07-24T10:26:33Z
2019-07-24T10:26:33Z
2009-01-01
 
Type Research Paper
 
Identifier Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/21701
 
Language English
 
Publisher Springer