Partial root drying: new approach to the growth and irrigation of pepper (Capsicum annuum L.) and tomato (Lycopersicon esculentum L.)
2005
Milosevic, S. (Institut za bioloska istrazivanja Sinisa Stankovic, Beograd (Serbia and Montenegro)), E-mail: [email protected] | Savic, S. | Stikic, R. | Zecevic, B. | Djordjevic, R. | Zdravkovic, J.
Pepper and tomato plants were grown in the commercial compost with the root system divided equally into two parts (PRD technique). At the end of the vegetative and during the generative stage of development, half of the root system was exposed to drought, while the reminding part was irrigated. One PRD treatment lasted approximately 10 days and during that period the soil water content in the dry root side was reduced to 30%. After this, the treatment was reversed, allowing the previously dried compartment to be well watered and the well-watered compartment to dry down. In control plants both compartments were watered daily to the drip point throughout the experimental period. During the experimental period the following parameters were measured: plant height, leaf number, shoot DW, fruit DW and water-use efficienct (WUE). Obtained results show that as a result of PRD treatment, the growth of whole plants was reduced, while the fruit growth was not reduced, although the WUE was increased. These results point out that by this technique it is possible to reduce the amount of irrigation water without a significant yield reduction.
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