Temperature Responses and Yield in Temperate Crops
Assuming that mineral nutrients and water supply are not limiting, crop yield depends upon: (1) the photosynthetic rate, (2) the amount of solar radiation intercepted and utilized in photosynthesis over the growing period, and (3) the proportion of total dry matter constituting the harvested part of the plant (harvest index). Under field conditions there is nothing the farmer can do about the major external factors affecting the photosynthetic rate, viz., the input of solar radiation, the CO2 supply, and temperature, and the main prospects for increasing total dry matter production lie in improving the photosynthetic rate and/or the efficiency of light interception by selection and breeding.
KeywordsPhotosynthetic Rate Temperature Response Cool Temperature Leaf Growth Light Interception
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