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Browsing by Author Wang, D.

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  • Soil Water Dynamics in Apple Orchards of Different Ages on the Loess Plateau of China

    • Authors: Wang, D.;  Advisor: -;  Participants: Wang, L. (2018)

  • We monitored soil water content (SWC, measured using a neutron probe) and calculated soil water storage (SWS), available SWS (ASWS), and soil desiccation along 0‐ to 600‐cm soil profiles in both orchards from May to September in 2012, 2013, 2014, and 2015. For both orchards, annual mean SWCs along the 0‐ to 600‐cm profile differed during the past 4 yr. Mean SWC along the profile was consistently higher in the 7‐yr‐old orchard at both monthly and annual timescales. Accordingly, monthly mean SWS and ASWS along the 0‐ to 600‐cm soil profiles were consistently lower in the 17‐yr‐old orchard. Moreover, a dried soil layer (DSL) had formed in the soil of the 17‐yr‐old orchard and there was s...
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  • Water use efficiency and optimal supplemental irrigation in a high yield wheat field

    • Authors: Wang, D.;  Advisor: -;  Participants: - (2017)

  • An eight-year field study was conducted in this region from 2007 to 2015, with the same water and fertilizer management used in the sowing stage of winter wheat, which then received supplemental irrigation (SI) or no irrigation (rain-fed). The proportion of water consumption from jointing to maturity averaged 56% under rain-fed conditions, but reached 64% under the optimal SI conditions. The main water supply during the different growth periods that was suitable for achieving both high yield and high water use efficiency (WUE) had a nearly constant volume. These results provide important theoretical and technical support for on-demand irrigation by model forecasting. The results also ...