חיפוש מתקדם
Journal of Hydrology
Shi, J., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Li, S., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Zuo, Q., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Ben-Gal, A., Soil, Water and Environmental Sciences, Agricultural Research Organization, Gilat Research Center, Mobile Post Negev, Israel
Governed by atmospheric demand, soil water conditions and plant characteristics, plant water status is dynamic, complex, and fundamental to efficient agricultural water management. To explore a centralized signal for the evaluation of plant water status based on soil water status, two greenhouse experiments investigating the effect of the relative distribution between soil water and roots on wheat and rice were conducted. Due to the significant offset between the distributions of soil water and roots, wheat receiving subsurface irrigation suffered more from drought than wheat under surface irrigation, even when the arithmetic averaged soil water content (SWC) in the root zone was higher. A significant relationship was found between the plant water deficit index (PWDI) and the root-weighted (rather than the arithmetic) average SWC over root zone. The traditional soil-based approach for the estimation of PWDI was improved by replacing the arithmetic averaged SWC with the root-weighted SWC to take the effect of the relative distribution between soil water and roots into consideration. These results should be beneficial for scheduling irrigation, as well as for evaluating plant water consumption and root density profile. © 2014 Elsevier B.V.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
An index for plant water deficit based on root-weighted soil water content
522
Shi, J., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Li, S., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Zuo, Q., Department of Soil and Water Sciences, China Agricultural University, Beijing, China, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Beijing, China, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing, China
Ben-Gal, A., Soil, Water and Environmental Sciences, Agricultural Research Organization, Gilat Research Center, Mobile Post Negev, Israel
An index for plant water deficit based on root-weighted soil water content
Governed by atmospheric demand, soil water conditions and plant characteristics, plant water status is dynamic, complex, and fundamental to efficient agricultural water management. To explore a centralized signal for the evaluation of plant water status based on soil water status, two greenhouse experiments investigating the effect of the relative distribution between soil water and roots on wheat and rice were conducted. Due to the significant offset between the distributions of soil water and roots, wheat receiving subsurface irrigation suffered more from drought than wheat under surface irrigation, even when the arithmetic averaged soil water content (SWC) in the root zone was higher. A significant relationship was found between the plant water deficit index (PWDI) and the root-weighted (rather than the arithmetic) average SWC over root zone. The traditional soil-based approach for the estimation of PWDI was improved by replacing the arithmetic averaged SWC with the root-weighted SWC to take the effect of the relative distribution between soil water and roots into consideration. These results should be beneficial for scheduling irrigation, as well as for evaluating plant water consumption and root density profile. © 2014 Elsevier B.V.
Scientific Publication
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