GREEN CANE HARVESTING PROMOTES ACCUMULATION OF SOlL ORGANIC MATTER AND AN IMPROVEMENT IN SOlL HEALTH
نویسندگان
چکیده
Analysis of data from the long term trash management trial at Mount Edgccombe (BTI) has shown that, after 59 ycars of green cane harvesting, with trash retention there was a significant incr-ease in soil organic matter content in thc surface 10 cm of soil compared with burning. The size of the microbial biomass, and its rcspiratory rate, dchytlrogenase activity and arginine ammonification rate were also increased by trash retention. Fertilised treatments tended to have a higher organic matter and rnicrobial biomass C content than unl'ertilised treatments, I-cflcct~ng the higher yields and greater organic matter returns under fertilisation. Soil microbial activity was however decreased by fertiliser applications. This inhibitory effect was attributed to fertiliser N-induced soil acidification.
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