Partial rootzone irrigation: Its physiological consequences and impact on water use efficiency

Jianhua Zhang, Wensuo Jia, Shaozhong Kang

Research output: Contribution to journalJournal article


Partial rootzone irrigation (PRI) means that only part of therootzone is wetted as in full irrigation,while the rest is unwatered during certain periods of the growing season of a crop.This practice is predicted to reduce plant water consumption and maintain the biomass production according to two theoretical backgrounds.Firstly,fully irrigated plants usually have widely opened stomata.A small narrowing of the stomatal opening may reduce water loss substantially with little effect on the photosynthesis.Secondly,part of the root system in drying soil can respond to the drying by sending a root-sourced signal to the shoots where stomata may be inhibited so that water loss is reduced.


Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalActa Botanica Boreali-Occidentalia Sinica
Issue number2
Publication statusPublished - 2001

User-Defined Keywords

  • partial rootzone irrigation (PRI)
  • water use efficiency (WUE)
  • soil drying
  • stomata
  • abscisic acid (ABA)
  • 根系分区灌溉
  • 水分利用效率
  • 土壤干旱
  • 气孔
  • 脱落酸


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