A Field Study of Soil Water Depletion Patterns in Presence of Growing Soybean Roots: III. Rooting Characteristics and Root Extraction of Soil Water

Tropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae: Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (T L) in tropical kudzu. RWC of waterstressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g (H2O).g (dry soil)-1.Stomatal conductance of stressed plants decreased from 221 to 98 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in T L between waterstressed and unstressed plants (deltaT L) rose linearly from 0.1 to 2.2ºC following progressive water deficit. RWC and T L of waterstressed plants paralled RWC and T L of unstressed plants the day after reirrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation.

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Water and energy exchange above a mixed European Beech – Norway Spruce forest canopy: a comparison of eddy covariance against soil water depletion measurement

Theoretical and Applied Climatology ◽

10.1007/s00704-004-0086-z ◽

2004 ◽

Vol 81 (1-2) ◽

pp. 87-100 ◽

Cited By ~ 17

Author(s):

H. Schume ◽

H. Hager ◽

G. Jost

Keyword(s):

Soil Water ◽

Eddy Covariance ◽

Norway Spruce ◽

Energy Exchange ◽

Forest Canopy ◽

European Beech ◽

Spruce Forest ◽

Soil Water Depletion ◽

Water Depletion ◽

Norway Spruce Forest

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Soil water depletion patterns of artificial forest species and ages on the Loess Plateau (China)

Forest Ecology and Management ◽

10.1016/j.foreco.2018.03.005 ◽

2018 ◽

Vol 417 ◽

pp. 137-143 ◽

Cited By ~ 24

Author(s):

Yu Liu ◽

Hai-Tao Miao ◽

Ze Huang ◽

Zeng Cui ◽

Honghua He ◽

...

Keyword(s):

Soil Water ◽

Loess Plateau ◽

Soil Water Depletion ◽

Forest Species ◽

The Loess Plateau ◽

Water Depletion

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Irrigation Scheduling with Planned Soil Water Depletion

Transactions of the ASAE ◽

10.13031/2013.28232 ◽

1994 ◽

Vol 37 (5) ◽

pp. 1491-1497 ◽

Cited By ~ 20

Author(s):

F. R. Lamm ◽

D. H. Rogers ◽

H. L. Manges

Keyword(s):

Soil Water ◽

Irrigation Scheduling ◽

Soil Water Depletion ◽

Water Depletion

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Double-Double Row Planting Mode at Deficit Irrigation Regime Increases Winter Wheat Yield and Water Use Efficiency in North China Plain

Agronomy ◽

10.3390/agronomy10091315 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1315

Author(s):

Xun Bo Zhou ◽

Guo Yun Wang ◽

Li Yang ◽

Hai Yan Wu

Keyword(s):

Winter Wheat ◽

Soil Water ◽

Water Use ◽

Deficit Irrigation ◽

Water Status ◽

Row Spacing ◽

Soil Water Depletion ◽

Double Row ◽

Water Depletion ◽

Use Efficiency

Low water availability coupled with poor planting method has posed a great challenge to winter wheat (Triticum aestivum L.) productivity. To improve productivity and water use efficiency (WUE) under deficit irrigation, an effective water-saving technology that is characterized by three planting modes has been developed (uniform with 30-cm row spacing (U), double-double row spacing of 5 cm (DD), and furrow-ridge row spacing of alternated 20 cm and 40 cm (F)) combined with three irrigation regimes (50 mm water each at growth stage 34 (GS34) and GS48 (W1), and 100 mm water at GS48 (W2), or 100 mm each water at GS34 and GS48 (W3)). Results showed that DD increased yield by 9.7% and WUE by 12.6% due to higher soil water status and less soil water depletion and evapotranspiration compared with U. Although the soil water status, soil water depletion, evapotranspiration, and yield increased with increasing irrigation amount, more soil water depletion and evapotranspiration resulted in low WUE. The deficit irrigation was beneficial for improving WUE as W1 had significantly increased yield by 5.4% and WUE by 7.1% compared with W2. Yield and evapotranspiration showed a quadratic dynamic equation indicating that yield increased with increasing evapotranspiration. Considering WUE and relatively higher yield under deficit water, W1 combined with DD is suggested to be a good management strategy to be applied in winter wheat of water-scarce regions.

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