Seasonal variation in soil CO2 emission and leaf gas exchange of well‐managed commercial Citrus sinensis (L.) orchards

Abstract Purpose To investigate whether soil clay content, cultivar and seasonal variation have any effect on CO 2 emission rates leaf assimilation in a drip-irrigated commercial Citrus sinensis orchard. Methods The study was carried out the field as randomised complete block design × factorial consisting of two types citrus cultivars orchards with 2-week interval measurements gas exchanges for year. Results Soil content did not influence plant irrigated citrus. However, significantly influenced both processes. were highest summer more than double observed winter while autumn four times higher season rates. Mean strongly by mean minimum temperatures only showed relatively weak relationship maximum temperatures. Conclusions drip suggesting non-significant soils subjected to similar management practices. rate peaks peak summer. A snapshot analysis sequestration suggests that are net sinks summer, season.