NDLI: Effect of living roots on soil organic matter decomposition

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Effect of living roots on soil organic matter decomposition

Content Provider	Semantic Scholar
Author	Cheng, Weixin Coleman, David C.
Copyright Year	1990
Abstract	Abstract Published information is contradictory about the inhibitory or stimulatory effect of living roots on soil organic matter decomposition. In this study, 14 C-labelled rye straw was exposed in fertilized or unfertilized soil with or without plants (winter rye, Secale cereale ) for 49 days under semi-controlled conditions. Our objective was to study the effect of roots on soil organic matter mineralization under different mineral nutrient conditions. The planted treatment had a higher 14 CO 2 loss and a higher efficiency of 14 C-labelled material utilization by microorganisms. Fertilization decreased 14 CO 2 loss. Percent 14 C in microbial biomass was positively correlated with percent 14 C respired. Total microbial biomass, 14 C-labelled microbial biomass and total 14 C remaining of the rhizosphere soil were higher compared to bulk soil. Living roots had a stimulatory effect on soil organic matter decomposition due to the higher microbial activity induced by the roots. This stimulatory effect was reduced by application of fertilizer.
Starting Page	781
Ending Page	787
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1016/0038-0717(90)90157-U
Volume Number	22
Alternate Webpage(s)	https://people.ucsc.edu/~wxcheng/1990%20Cheng%20and%20Coleman%20SBB.pdf
Alternate Webpage(s)	https://doi.org/10.1016/0038-0717%2890%2990157-U
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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