NDLI: Rhizosphere priming effects on the decomposition of soil organic matter in C$_{4}$ and C$

Content Provider	Springer Nature Link
Author	Fu, Shenglei Cheng, Weixin
Copyright Year	2002
Abstract	Using a natural abundance $^{13}$C method, soil organic matter (SOM) decomposition was studied in a C$_{3}$ plant – `C$_{4}$ soil' (C$_{3}$ plant grown in a soil obtained from a grassland dominated by C$_{4}$ grasses) system and a C$_{4}$ plant – `C$_{3}$ soil' (C$_{4}$ plant grown in a soil taken from a pasture dominated by C$_{3}$ grasses) system. In C$_{3}$ plant – `C$_{4}$ soil' system, cumulative soil-derived CO$_{2}$–C were higher in the soils planted with soybean (5499 mg pot$^{−1}$) and sunflower (4484 mg pot$^{−1}$) than that in `C$_{4}$ soil' control (3237 mg pot$^{−1}$) without plants. In other words, the decomposition of SOM in soils planted with soybean and sunflower were 69.9% and 38.5% faster than `C$_{4}$ soil' control. In C$_{4}$ plant – `C$_{3}$ soil' system, there was an overall negative priming effect of live roots on the decomposition of SOM. The cumulative soil-derived CO$_{2}$–C were lower in the soils planted with sorghum (2308 mg pot$^{−1}$) and amaranthus (2413 mg pot$^{−1}$) than that in `C$_{3}$ soil' control (2541 mg pot$^{−1}$). The decomposition of SOM in soils planted with sorghum and amaranthus were 9.2% and 5.1% slower than `C$_{3}$ soil' control. Our results also showed that rhizosphere priming effects on SOM decomposition were positive at all developmental stages in C$_{3}$ plant – `C$_{4}$ soil' system, but the direction of the rhizosphere priming effect changed at different developmental stages in the C$_{4}$ plant – `C$_{3}$ soil' system. Implications of rhizosphere priming effects on SOM decomposition were discussed.
Starting Page	289
Ending Page	294
Page Count	6
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	238
Issue Number	2
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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