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Studies on the productivity of tropical pasture plants. 4. Separation of photosynthetic and respiratory components of net assimilation rate by growth analysis and gas exchange techniques under natural lighting


, : Studies on the productivity of tropical pasture plants. 4. Separation of photosynthetic and respiratory components of net assimilation rate by growth analysis and gas exchange techniques under natural lighting. Australian Journal of Agricultural Research 25(3): 415-424

In glasshouse trials, 6-week-old plants of 6 tropical legume and 4 grass species, and in a field trial a 3-year-old Guinea grass pasture with 3 weeks regrowth were subjected to 0, 2, 3 or 4 dark days during a 12-day period. The use of short-wave radiation rather than days in the light as the quantification of photosynthetic opportunity in regression analysis improved the accuracy of estimation of photosynthesis and respiration.

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