Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil
To ascertain the levels of urease activities (UA) and their relationships with soil physicochemical properties in salt-affected soils during reclamation, soil transects of a saline-sodic soil with different planting years under drip irrigation were intensively sampled. An enhanced soil UA in root zo...
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Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
2014
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oai:scielo:S0718-951620140002000052014-07-30Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soilZhang,T.Wan,S.Kang,Y.Feng,H. Soil enzyme wolfberry takyric solonetz drip irrigation path analysis To ascertain the levels of urease activities (UA) and their relationships with soil physicochemical properties in salt-affected soils during reclamation, soil transects of a saline-sodic soil with different planting years under drip irrigation were intensively sampled. An enhanced soil UA in root zone (0-40 cm beneath drip emitter) was found as the planting years increased. In all transects, soil UA ranged from 0.38 to 8.53 µg NH4+-N released g-1 dry soil h-1 at 37 °C, and showed a large spatial variability within transect. R² of multiple regressions increased gradually with planting years, indicating that variations in UA could be better predicted after amelioration. Path analysis showed that the negative direct effects of soil pH on UA were clearly dominant, with the direct path coefficients of -0.357 ~ -0.666 (p < 0.05). Soil organic matter yielded greater positive indirect path coefficients through pH and total nitrogen. An exponential relationship was found between soil UA and pH values (p < 0.01). Our findings demonstrate that after the cultivation under drip irrigation for 3 years, soil biological activities and fertility level increased, with the decrease of soil salinity and sodicity.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.14 n.2 20142014-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200005en10.4067/S0718-95162014005000025 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Soil enzyme wolfberry takyric solonetz drip irrigation path analysis |
| spellingShingle |
Soil enzyme wolfberry takyric solonetz drip irrigation path analysis Zhang,T. Wan,S. Kang,Y. Feng,H. Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| description |
To ascertain the levels of urease activities (UA) and their relationships with soil physicochemical properties in salt-affected soils during reclamation, soil transects of a saline-sodic soil with different planting years under drip irrigation were intensively sampled. An enhanced soil UA in root zone (0-40 cm beneath drip emitter) was found as the planting years increased. In all transects, soil UA ranged from 0.38 to 8.53 µg NH4+-N released g-1 dry soil h-1 at 37 °C, and showed a large spatial variability within transect. R² of multiple regressions increased gradually with planting years, indicating that variations in UA could be better predicted after amelioration. Path analysis showed that the negative direct effects of soil pH on UA were clearly dominant, with the direct path coefficients of -0.357 ~ -0.666 (p < 0.05). Soil organic matter yielded greater positive indirect path coefficients through pH and total nitrogen. An exponential relationship was found between soil UA and pH values (p < 0.01). Our findings demonstrate that after the cultivation under drip irrigation for 3 years, soil biological activities and fertility level increased, with the decrease of soil salinity and sodicity. |
| author |
Zhang,T. Wan,S. Kang,Y. Feng,H. |
| author_facet |
Zhang,T. Wan,S. Kang,Y. Feng,H. |
| author_sort |
Zhang,T. |
| title |
Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| title_short |
Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| title_full |
Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| title_fullStr |
Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| title_full_unstemmed |
Urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| title_sort |
urease activity and its relationships to soil physiochemical properties in a highly saline-sodic soil |
| publisher |
Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo |
| publishDate |
2014 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000200005 |
| work_keys_str_mv |
AT zhangt ureaseactivityanditsrelationshipstosoilphysiochemicalpropertiesinahighlysalinesodicsoil AT wans ureaseactivityanditsrelationshipstosoilphysiochemicalpropertiesinahighlysalinesodicsoil AT kangy ureaseactivityanditsrelationshipstosoilphysiochemicalpropertiesinahighlysalinesodicsoil AT fengh ureaseactivityanditsrelationshipstosoilphysiochemicalpropertiesinahighlysalinesodicsoil |
| _version_ |
1714206478490927104 |