Enzyme activity in soil after different procedures for managing rice straw
Date
2016Cita bibliográfica
Albiach, R., Pomares, F., Ribó, M., Pérez-Piqueres, A., & Canet, R. (2016). Enzyme activity in soil after different procedures for managing rice straw. Recursos Rurais, (12), 33-38.Abstract
Severe problems are caused by site burning of
rice straw in Valencia, the third largest Spanish city.
Removal, incorporation or composting are being tested as
alternatives to burning, and the changes they produce in
selected soil biological properties have been studied in two
field trials. One compares removal, burning and
incorporation the straw, and a second evaluates the
application of straw-derived compost for rice production. No
statistically-significant effects on the measured indicators of
biological activity were found in either experiment, indicating
that management-induced changes are small.
Unexpectedly, burning did not affect negatively enzyme
activities or microbial biomass contents since there were no
differences between treatments, or usual levels were
recovered in a few months. The changes induced by straw
removal or incorporation were also not statistically
significant. When straw-derived compost applications were
assayed, dehydrogenase activity was slightly variable and
apparently unaffected by N and compost rates or
compost/mineral N combinations, but phosphomonosterase
activity seems to increase parallel to compost to mineral N
ratio.