Ground surface conditions of oases around the Taklimakan Desert

Ishiyama, Takashi; Saito, Nariaki; Fujikawa, S.; Ohkawa, Kousaku; Tanaka, Shigeru

doi:10.1016/j.asr.2006.02.053

Cited by 6 publications

(5 citation statements)

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“…Cotton is one of the most important commercial crops in the Qira oasis [29] . Figure 1 Location of the study area, adapted from Ishiyama et al [45]…”

Section: Study Areamentioning

confidence: 99%

Water use efficiency and yield responses of cotton to field capacity-based deficit irrigation in an extremely arid area of China

GUI

et al. 2019

International Journal of Agricultural and Biological Engineering

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The objectives of present investigation were to test the effects on water use efficiency (WUE) and cotton yield of implementing a range of deficit irrigation regimes triggered at specific fractions of root zone soil moisture, field capacity (θ fc) and different crop phenological stages. The study was conducted on southern oasis of the Taklamakan desert, China. The cotton crop's WUE was quantified, as were leaf photosynthesis and yield. From a photosynthetic perspective, deficit irrigation resulted in 16.8%, 10.3% and 2.2% increases in leaf WUE under θ fc-based regulated deficit irrigation (T1, T2, and T3), compared to the control, respectively. Cotton yield and its components were significantly affected by irrigation depths (p≤0.05). A relatively high seed yield (0.65 kg/m 3) and the highest WUE were achieved, under T3 (70% θ fc at seedling stage, 60% θ fc at squaring, 50% θ fc at full-bloom, 70% θ fc at boll, 70% θ fc at boll cracking stage), showing it to be the most effective and productive irrigation schedule tested. As the application of θ fc-based deficit irrigation in surface-irrigated cotton fields showed great potential in saving water, maintaining a high WUE, and improving cotton seed yield, a management strategy consisting or irrigation thresholds of 70% θ fc in the root zone at the seedling, boll and boll cracking stages, and of 60% θ fc at the squaring stage, and 50% θ fc at the full-bloom stage, would be recommended for this extremely arid region.

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“…Cotton is one of the most important commercial crops in the Qira oasis [29] . Figure 1 Location of the study area, adapted from Ishiyama et al [45]…”

Section: Study Areamentioning

confidence: 99%

Water use efficiency and yield responses of cotton to field capacity-based deficit irrigation in an extremely arid area of China

GUI

et al. 2019

International Journal of Agricultural and Biological Engineering

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“…The study area is around Hotien Oasis of the southwestern part of Taklimakan Desert in XinJiang, China. Covering the area between 74 • E and 96 • E, 36 • N and 43 • N Taklimakan Desert is the largest sandy desert in Asia with the area of about 270,000 km 2 [11,12]. The main reasons of having chosen the area are (1) During a fairly large-scale research project "Japan-China Joint Study on Desertification (1989-1994)", using a hand-held radiometer we have collected abundantly the land surface and underground temperature data of this area together with near surface meteorological data and also radio sounding data.…”

Section: Study Areamentioning

confidence: 99%

Comparisons of Brightness Temperatures of Landsat-7/ETM+ and Terra/MODIS around Hotien Oasis in the Taklimakan Desert

Oguro

Ito

Tsuchiya

2011

Applied and Environmental Soil Science

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The brightness temperature (BT) of Taklimakan Desert retrieved from the data of Landsat-7/ETM+ band 6 and Terra/MODIS band 31 and 32 indicates the following features: (1) good linear relationship between the BT of ETM+ and that of MODIS, (2) the observation time adjusted BT of ETM+ is almost equal to that of MODIS, (3) the BT of Terra/MODIS band 31 is slightly higher than that of band 32 over a reservoir while opposite feature is recognized over desert area, (4) the statistical analysis of 225 sample data of ETM+ in one pixel of MODIS for different landcovers indicates that the standard deviation and range of BT of ETM+ corresponding to one pixel of MODIS are0.45∘C,2.25∘Cfor a flat area of desert, while respective values of the oasis farmland and shading side of rocky hill amount to2.88∘C,14.04∘C, and2.80∘C,16.04∘C.

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“…The origination and evolution of oases are significantly dependent on specific hydrologic, topographic and geologic settings [10,11]. A systematic mapping from remote sensing data shows that oases are geographically distributed on alluvial fans and along the rivers channels [12]. Precipitation is an important input of water sources to oases, however snow and glacier melting water from surrounding high mountains provide a more significant source.…”

Section: Introductionmentioning

confidence: 99%

Oasis Evolution in Response to Human Inducedwater Resources Reallocation in South Xinjiang during Past Four Decades

Ma¹,

Wang²,

Yan³

et al. 2019

Preprint

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Vegetation in drylands is sensitive to climatic changes and human activities. Remote sensing and spatial analyses provide us useful tools for monitoring long-term vegetation dynamics over large regional scale. In this study, we analyzed the oasis vegetation cover change of the Tarim Basin using Landsat data sets from six epochs, 1975s, 1990s, 2000s, 2005s, 2010s and 2014. The results show that vegetation cover of oases increases from 34600 km2 in 1975s to 101000 km2 in 2014, though there was a vegetation coverage decrease from 77600 km2 in 2000s to 42680 km2 in 2010s. The percentage of annul water consumption has increased from 34% in 1970s to 52% in 2010s in the upper Tarim River, and decreased from 15% in 1970s to 9% in 2010s in the lower Tarim River. The decrease of oases area from 2000s to 2010s probably resulted from the rapid urbanization and large scale land reclamation. Although there is an increasing trend for oases coverage, local degradation of oases especially in the northern part occurred. This may be caused by inadequate water supply of the Tarim River. The results of multiple regression show that human activities contribute 70% of oases area change. Human induced water resources reallocation and heat energy balance is the primary cause of total oasis change.

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Ground surface conditions of oases around the Taklimakan Desert

Cited by 6 publications

References 0 publications

Water use efficiency and yield responses of cotton to field capacity-based deficit irrigation in an extremely arid area of China

Water use efficiency and yield responses of cotton to field capacity-based deficit irrigation in an extremely arid area of China

Comparisons of Brightness Temperatures of Landsat-7/ETM+ and Terra/MODIS around Hotien Oasis in the Taklimakan Desert

Oasis Evolution in Response to Human Inducedwater Resources Reallocation in South Xinjiang during Past Four Decades

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