Shaozhong Kang

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Controlled alternate partial root-zone irrigation (CAPRI), also called partial root-zone drying (PRD) in other literature, is a new irrigation technique and may improve the water use efficiency of crop production without significant yield reduction. It involves part of the root system being exposed to drying soil while the remaining part is irrigated(More)
Crop yields on the Loess Plateau of China are mainly limited by available water. A field experiment was conducted for winter wheat (Triticum aestivum L.) during 1995–98 to evaluate the effects of limited irrigation on crop yield and water use efficiency (WUE). The results showed that evapotranspiration, grain yield, biomass, WUE and harvest index depended(More)
Effects of partial root-zone irrigation (PRI) on the hydraulic conductivity in the soil-root system (L(sr)) in different root zones were investigated using a pot experiment. Maize plants were raised in split-root containers and irrigated on both halves of the container (conventional irrigation, CI), on one side only (fixed PRI, FPRI), or alternately on one(More)
The physiological basis for the advantage of alternate partial root-zone irrigation (PRI) over common deficit irrigation (DI) in improving crop water use efficiency (WUE) remains largely elusive. Here leaf gas exchange characteristics and photosynthetic CO(2)-response and light-response curves for maize (Zea mays L.) leaves exposed to PRI and DI were(More)
The dual-source Shuttleworth-Wallace model has been widely used to estimate and partition crop evapotranspiration (λET). Canopy stomatal conductance (Gsc), an essential parameter of the model, is often calculated by scaling up leaf stomatal conductance, considering the canopy as one single leaf in a so-called "big-leaf" model. However, Gsc can be(More)
In arid regions, human activities like agriculture and industry often require large ground water extractions. Under these circumstances, appropriate ground water management policies are essential for preventing aquifer overdraft, and thereby protecting critical ecologic and economic objectives. Identification of such policies requires accurate simulation(More)
Quantifying the influence of driving factors on irrigation water productivity (IWP) is vital for efficient agricultural water use. This study analyzed contributions of agronomic practice and climatic factors to the changes of IWP, based on the data from 1981 to 2012 in Hexi Corridor, Northwest China. Cobb-Douglas production functions were developed by the(More)
Saline irrigation decreased the evapotranspiration (ET) of Haloxylon Ammodendron Bunge (H. Ammodendron) and Caragana Karshiskii Kom (C. Karshiskii) via reducing transpiration water, and it also changed the proportion of transpiration in ET: the proportion of evaporation from soil surface increased, and the proportion of transpiration in ET decreased when(More)
Intelligent Control System of Crop Partial root-zone Alternative Irrigation includes Signal acquisition module, it is used for real-time collecting soil moisture information lying in different root-zone; Control module uses the lateral root zone moisture difference alternate threshold, maximum of soil moisture, minimum of soil moisture and measured soil(More)