Abstract
Partial root-zone irrigation (PRI) such as alternate partial root-zone irrigation (APRI) and partial root-zone drying (PRD) is a new high-efficient water saving technique. Effect of partial root-zone irrigation on the photosynthesis, leaf area, dry mass accumulation and water use of sweet corn under two fertilization levels was studied in this paper. The author found that compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively.With the advance of sweat corn growth stages, the difference of leaf area for different irrigation treatments lessened gradually, mean dry mass reduced 15.14% and 24.38%,mean evapotranspiration (i.e. water use ) reduced 31.28% and 29.58%,while canopy WUE increased 23.48% and 7.40%. The result indicated that partial root-zone irrigation increased more canopy WUE under higher fertilization, so the water saving effect of partial root-zone irrigation should combine with rational fertilization.
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Claims 9
Claim · model-written summary
Partial root-zone irrigation reduced mean transpiration rate by 19.01% and 17.50% relative to conventional irrigation
Verbatim
e1“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation increased sweet corn photosynthesis rate by 8.88% and 18.34% relative to conventional irrigation
Verbatim
e1“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation increased leaf water use efficiency by 34.69% and 43.45% relative to conventional irrigation
Verbatim
e1“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation reduced mean dry mass of sweet corn by 15.14% and 24.38% relative to conventional irrigation
Verbatim
e1“mean dry mass reduced 15.14% and 24.38%”
e2“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation reduced mean evapotranspiration of sweet corn by 31.28% and 29.58% relative to conventional irrigation
Verbatim
e1“mean evapotranspiration (i.e. water use ) reduced 31.28% and 29.58%”
e2“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation increased canopy water use efficiency of sweet corn by 23.48% and 7.40% relative to conventional irrigation
Verbatim
e1“while canopy WUE increased 23.48% and 7.40%”
e2“compared with conventional irrigation for whole root zone (CI), under high and fertilization for PRI ,mean transpiration rate reduced 19.01% and 17.50% ,photosynthesis rate increased by 8.88% and 18.34%,leaf water use efficiency (WUE) increased by 34.69% and 43.45%,respectively”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation increased canopy water use efficiency more under higher fertilization
Verbatim
e1“The result indicated that partial root-zone irrigation increased more canopy WUE under higher fertilization”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Differences in leaf area between irrigation treatments of sweet corn lessened as growth stages advanced
Verbatim
e1“With the advance of sweat corn growth stages, the difference of leaf area for different irrigation treatments lessened gradually”
e0“of Sweet Corn under Two Fertilization Level”
Claim · model-written summary
Partial root-zone irrigation should be combined with rational fertilization to realize its water saving effect
Verbatim
e1“so the water saving effect of partial root-zone irrigation should combine with rational fertilization”
e0“of Sweet Corn under Two Fertilization Level”
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