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The physiological processes and mechanisms for superior water productivity of a popular ground cover rice production system
Year:
2018
Source of publication :
Agricultural Water Management
Authors :
בן-גל, אלון
;
.
Volume :
201
Co-Authors:

Li, S.; Zuo, Q.; Jin, X.; Ma, W.; Shi, J.

Facilitators :
From page:
11
To page:
20
(
Total pages:
10
)
Abstract:

Ground cover rice production systems (GCRPS) have been shown to both save water and increase yields compared to traditional paddy rice production systems (TPRPS). Physiological processes and mechanisms explaining the superiority of a popular GCRPS were investigated in a series of hydroponic, soil column and field experiments. Soil water, temperature and nitrogen, leaf gas exchange, plant water and nitrogen, growth and yield, transpiration, and water productivity were analyzed. Compared to TPRPS, plant available soil inorganic nitrogen was generally improved under GCRPS due to a combination of higher soil temperature and less nitrogen loss through non-physiological water consumption, especially during the early growing season. Consequently, more nitrogen was absorbed by plants under GCRPS except serious drought conditions, accompanied by higher nitrogen contents in plant tissues. Preferable specific leaf nitrogen might lead to higher leaf photosynthetic rate under optimal water conditions and less decrease relative to leaf transpiration rate under water stress. Therefore, rice under GCRPS grew faster with much more biomass and grain yield while transpiration consumption was limited in spite of the fact that the number of tillers and therefore leaf area were increased relative to TPRPS, resulting in superior water productivity. Compared to TPRPS, the root system under GCRPS was limited, but it could absorb enough water and nutrients (especially nitrogen) to support a relatively large canopy even when under water stress, which might be attributed to its higher nitrogen content and thus stronger activity. © 2018 Elsevier B.V.

Note:
Related Files :
Forestry
nitrogen
physiological process
soil moisture
Soils
Specific leaf nitrogen
transpiration
water use efficiency
עוד תגיות
תוכן קשור
More details
DOI :
https://doi.org/10.1016/j.agwat.2018.01.002
Article number:
0
Affiliations:

College of Resources and Environmental Sciences, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China; Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang, China; Soil Water and Environmental Sciences, Agricultural Research Organization, Gilat Research Center, mobile post Negev, Israel

Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
36088
Last updated date:
02/03/2022 17:27
Creation date:
01/08/2018 09:17
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Scientific Publication
The physiological processes and mechanisms for superior water productivity of a popular ground cover rice production system
201

Li, S.; Zuo, Q.; Jin, X.; Ma, W.; Shi, J.

The physiological processes and mechanisms for superior water productivity of a popular ground cover rice production system

Ground cover rice production systems (GCRPS) have been shown to both save water and increase yields compared to traditional paddy rice production systems (TPRPS). Physiological processes and mechanisms explaining the superiority of a popular GCRPS were investigated in a series of hydroponic, soil column and field experiments. Soil water, temperature and nitrogen, leaf gas exchange, plant water and nitrogen, growth and yield, transpiration, and water productivity were analyzed. Compared to TPRPS, plant available soil inorganic nitrogen was generally improved under GCRPS due to a combination of higher soil temperature and less nitrogen loss through non-physiological water consumption, especially during the early growing season. Consequently, more nitrogen was absorbed by plants under GCRPS except serious drought conditions, accompanied by higher nitrogen contents in plant tissues. Preferable specific leaf nitrogen might lead to higher leaf photosynthetic rate under optimal water conditions and less decrease relative to leaf transpiration rate under water stress. Therefore, rice under GCRPS grew faster with much more biomass and grain yield while transpiration consumption was limited in spite of the fact that the number of tillers and therefore leaf area were increased relative to TPRPS, resulting in superior water productivity. Compared to TPRPS, the root system under GCRPS was limited, but it could absorb enough water and nutrients (especially nitrogen) to support a relatively large canopy even when under water stress, which might be attributed to its higher nitrogen content and thus stronger activity. © 2018 Elsevier B.V.

Scientific Publication
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