ABSTRACT
This chapter reviews the growth and the systems that implement temperature manipulation. The temperature a plant actually achieves is a function of several factors –aside from the temperature of the air surrounding the plant. The temperature manipulation in greenhouses is a function of: the external climate and weather, the systems and fuel available, and the objectives of the grower. The temperature range for greenhouse plant production is relatively narrow, i.e., from about 10 to 30 C for almost all species with some exceptions in the case of specialized application. The effect of temperature can be both obvious and very subtle. The various effects of night temperatures versus day temperatures on growth and development of greenhouse plants have been a subject of considerable importance for many years. Temperature can be thought of as a driving force for energy transfer, and it is, probably, the most common measurement made in greenhouses. The chapter discusses the equipment and methods employed to control temperature.
