Spatial variation in soil phosphomonoesterase in irrigated and dry farmlands |
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Authors: | A A S Sinegani A Hossainpour F Nazarizadeh |
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Institution: | (1) Faculty of Agriculture, Bu-Ali Sina University, Hamadan, Iran |
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Abstract: | Spatial variation in the content of acid and alkaline phosphatase was surveyed on two farmlands. Two adjacent plots, one irrigated
and cultivated and the other nonirrigated and cultivated, were marked on a 300-m-long transect with 10-m spacing. Soil samples
were collected at the depths of 0–30 and 30–60 cm and were then analyzed for acid and alkaline phosphatase and other soil
parameters. The analytical results were then subjected to classical statistical and geostatistical analysis. The results showed
that the correlation coefficients of the phosphatase and clay, the silt, the sand, the mean weight diameter, the geometric
mean diameter, the equivalent CaCO3, the pH, the electrical conductivity, the organic carbon, the respiration, the Olsen available phosphorus, and the vesicular
arbuscular mycorrhizae (VAM) spore numbers of the soils in the transect studied were highly significant. In both layers of
the irrigated farmland, the coefficients of the variation of the acid phosphatase were relatively high and the coefficients
of the variation of the alkaline phosphatase were relatively low compared to those of the dry farmland. Although the acid
and alkaline phosphatase in the topsoil and subsoil of the farmlands exhibited a spatial dependence at the sampled scale,
the stability of the spatial structures were markedly low.
Published in Russian in Pochvovedenie, 2006, No. 5, pp. 569–573.
The text was submitted by the authors in English. |
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