Nutritional responses to soil drying and rewetting cycles under partial root-zone drying irrigation
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Nutritional responses to soil drying and rewetting cycles under partial root-zone drying irrigation. / Wang, Yaosheng; Jensen, Christian Richardt; Liu, Fulai.
In: Agricultural Water Management, Vol. 179, 2017, p. 254-259.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Nutritional responses to soil drying and rewetting cycles under partial root-zone drying irrigation
AU - Wang, Yaosheng
AU - Jensen, Christian Richardt
AU - Liu, Fulai
N1 - Special Issue on Improving Agricultural Water Productivity to Ensure Food Security under Changing Environments Overseen by: Brent Clothier
PY - 2017
Y1 - 2017
N2 - Abstract Repeated soil drying and rewetting (DRW) cycles occur in rainfed and irrigated agriculture. The intensity and frequency of DRW cycles regulate both microbial physiology and soil physical processes, hereby affecting the mineralization and immobilization of soil nutrients and their bioavailability. Partial root-zone drying irrigation (PRI) irrigates half of the soil zone, while the other half is allowed to dry, and the two halves is alternately irrigated. PRI outweighs conventional deficit irrigation in further improving water use efficiency (WUE) by enhancing the root-to-shoot chemical signaling that regulates stomatal aperture. PRI induced soil DRW cycles and more soil water dynamics in the root zone enhance soil nutrient mineralization process and thus increase the bioavailability of soil nutrients, resulting in improved nitrogen (N) and phosphorus (P) uptake, in which soil microbial processes play a key role. Studies investigating how soil DRW cycles and water dynamics under PRI on nutrient transport in soil solution, soil microbe mediated P transformation, interactions between phytohormones and nutrient uptake, root morphological and architectural traits for nutrient acquisition, and PRI-integrated fertigation are still lacking. In addition, the positive nutritional effect may be varied in terms of climatic conditions and intensity and frequency of precipitation or irrigation, and these merit further in-depth studies.
AB - Abstract Repeated soil drying and rewetting (DRW) cycles occur in rainfed and irrigated agriculture. The intensity and frequency of DRW cycles regulate both microbial physiology and soil physical processes, hereby affecting the mineralization and immobilization of soil nutrients and their bioavailability. Partial root-zone drying irrigation (PRI) irrigates half of the soil zone, while the other half is allowed to dry, and the two halves is alternately irrigated. PRI outweighs conventional deficit irrigation in further improving water use efficiency (WUE) by enhancing the root-to-shoot chemical signaling that regulates stomatal aperture. PRI induced soil DRW cycles and more soil water dynamics in the root zone enhance soil nutrient mineralization process and thus increase the bioavailability of soil nutrients, resulting in improved nitrogen (N) and phosphorus (P) uptake, in which soil microbial processes play a key role. Studies investigating how soil DRW cycles and water dynamics under PRI on nutrient transport in soil solution, soil microbe mediated P transformation, interactions between phytohormones and nutrient uptake, root morphological and architectural traits for nutrient acquisition, and PRI-integrated fertigation are still lacking. In addition, the positive nutritional effect may be varied in terms of climatic conditions and intensity and frequency of precipitation or irrigation, and these merit further in-depth studies.
KW - Deficit irrigation
KW - Mineralization
KW - Nitrogen
KW - Phosphorus
KW - Water-saving agriculture
U2 - 10.1016/j.agwat.2016.04.015
DO - 10.1016/j.agwat.2016.04.015
M3 - Journal article
VL - 179
SP - 254
EP - 259
JO - Agricultural Water Management
JF - Agricultural Water Management
SN - 0378-3774
ER -
ID: 171657292