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Rice (a C3 crop) and barnyard grass (Echinochloa crusgalli L.) (a C4 weed) were grown in a 1:1 mixture in a paddy field in ambient condition and with supplemented free air carbon dioxide enrichment (FACE, CO2 concentration + 200 μmol mol−1), in order to evaluate the impact of rising atmospheric carbon dioxide on nutrient competition between rice crop and weed. Results showed that elevated CO2 significantly...
Free-air CO2 enrichment (FACE) system at a Chinese rice–wheat rotation field was constructed to investigate responses of rice and wheat crop growth to elevated CO2 and nitrogen fertilization. A factorial experiment design was set up with two levels of atmospheric CO2 concentration (350 and 550 μmol mol−1) and N application rates (LN: 150 kg N ha−1 for rice and 125 kg N ha−1 for wheat; HN: 250 kg N ha...
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