Wulanwusu Agro meteorological Experiment Station

Shihezi, China

Wulanwusu Agro meteorological Experiment Station

Shihezi, China
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Yang H.-J.,Xinjiang Institute of Ecology and Geography | Liu L.-J.,Xinjiang Institute of Ecology and Geography | Ma J.-L.,Xinjiang Institute of Ecology and Geography | Wang J.,Wulanwusu Agro meteorological Experiment Station | Li X.-Y.,Xinjiang Institute of Ecology and Geography
Chinese Journal of Ecology | Year: 2016

Remote sensing is one of widely used data source of landscape analysis with different resolutions. Predominant ground object could be different on various scales. Multi-scale analysis has become a necessary method in the field of landscape ecology because a single scale could not describe or explain many environmental problems. The data, which were aggregated by average with different resolutions (30, 150, 330, 660, 990, 1650, 1980 and 3300 m) based on the Landsat 8 remote sensing images with original 30 m resolution of 2013, were input to remote sensing model to simulate multi-scale NPP. The results showed that, with scaling up, NPP of crop increased, but NPP of forest, grassland and bare land almost remained unchanged. Average stimulated NPP of 30 m resolution was 5.36% higher than that of 990 m resolution. Upscaling induced the change of mean estimated NPP in Mans River Watershed, producing scale effect, due to land cover change. However, the spatial patterns of NPP in Mans River Watershed were similar on various scales and their characteristics remained unchanged with scaling up. © 2016, editorial Board of Chinese Journal of Ecology. All Rights Reserved.


Ma J.-L.,Xinjiang Institute of Ecology and Geography | Liu L.-J.,Xinjiang Institute of Ecology and Geography | Li X.-Y.,Xinjiang Institute of Ecology and Geography | Wang J.,Wulanwusu Agro meteorological Experiment Station | Yang H.-J.,Xinjiang Institute of Ecology and Geography
Chinese Journal of Ecology | Year: 2015

Water resources are a major constraint on agricultural development in arid areas. In recent years, with the development of water-saving irrigation technology, the contradiction between supply and demand of water resources was alleviated and the irrigation area was expanded. Understanding the evapotranspiration process of cropland under non-full irrigating has great scientific significance to reveal the water cycle process and guide water-saving practices. In this paper, based on eddy covariance data in 2012 from Wulanwusu Agro-meteorological Experiment Station, the evapotranspiration process of cotton filed in the different growth stages under mulched drip irrigation in Manas River basin of Xinjiang were analyzed. Furthermore, the crop coefficients of cotton under mulched drip irrigation were calculated based on the estimated evapotranspiration of reference crop by FAO-56 Penman-Monteith equation. The results showed that evapotranspiration and its rate of cotton field under mulched drip irrigation in oasis peaked in the flowering stage, with the phasic evapotranspiration of 248.51 mm and average daily evapotranspiration rate of 3.94 mm·d-1. Followed by the values in the budding stage, the phasic evapotranspiration was 98.34 mm, and the average daily evapotranspiration rate was 3.18 mm·d-1. The minimum values occurred in the sowing and seeding stages, the phasic evapotranspiration was 10.70 mm, and the average daily evapotranspiration rate was 1.07 mm·d-1. In summary, the amount of evapotranspiration was 487.14 mm during the whole growing period, and the average crop coefficient was 0.42. The results of evapotranspiration and crop coefficients of cotton at different stages provide a scientific basis not only for rating and timing of irrigation of cotton at different growth stages but also for field water management. © 2015, editorial Board of Chinese Journal of Ecology. All rights reserved.


Yang H.-J.,Xinjiang Institute of Ecology and Geography | Li X.-Y.,Xinjiang Institute of Ecology and Geography | Liu L.-J.,Xinjiang Institute of Ecology and Geography | Ma J.-L.,Xinjiang Institute of Ecology and Geography | Wang J.,Wulanwusu Agro meteorological Experiment Station
Chinese Journal of Applied Ecology | Year: 2016

Net primary productivity (NPP), as the base for the research of matter recycling and energy flow in terrestrial ecosystem, is sensitive to the changes of environment and climate in arid region, and also is an important indicator of eco-environmental characteristics. Based on remote sensing (RS) and geographic information system (GIS), using meteorological data, eddy covariance data, Landsat 8 and MODIS data, this study coupled SEBAL model and light utility efficiency model to estimate the NPP of vegetation in Manas River Watershed, and the spatial pattern of NPP and the relationships between NPP and terrain factors (elevation and slope) were analyzed. Results showed that the estimated result of NPP in Manas River Watershed by coupling model was reasonable and could actually reflect the NPP of vegetation. The total annual NPP of vegetation and the mean annual NPP in Manas River Watershed in 2013 were 7066.72 Tg C·a-1 and 278.06 g C·m-2·a-1 respectively. With the variation of geomorphic type and land cover, the NPP changed remarkably from south to north in a trend of increase-decrease-increase-decrease pattern. The temporal variations of NPP were also obvious, with the NPP in July and August accounting for 52.2% of total annual NPP. With the increase of the elevation and slope, the mean annual NPP decreased as a whole with fluctuations induced by different land covers and environmental factors. © 2016, Science Press. All right reserved.


Liu M.-X.,CAS Nanjing Institute of Soil Science | Liu M.-X.,CAS Institute of Subtropical Agriculture | Yang J.-S.,CAS Nanjing Institute of Soil Science | Li X.-M.,CAS Nanjing Institute of Soil Science | And 2 more authors.
Pedosphere | Year: 2013

Drip irrigation under plastic mulch has been widely applied in arid Northwest China as a water-saving irrigation technology. A comprehensive knowledge of the distribution and movement of soil water in root zone is essential for the design and management of irrigation regimes. Simulation models have been proved to be efficient methods for this purpose. In this study, the numerical model Hydrus-2D was used to simulate the temporal variations of soil water content in a drip irrigated cotton field under mulching. A concept of partitioning coefficient, calibrated to be 0.07, was introduced to describe the effect of plastic mulch on prevention of evaporation. The soil hydraulic parameters were optimized by inverse solution using the field data. At the optimized conditions, the model was used to predict soil water content for four field treatments. The agreements between the predictions and observations were evaluated using coefficient of determination (R2) and root mean square error (RMSE). The results suggested that the model fairly reproduced the variations in soil water content at all locations in four treatments, with R2 ranging from 0.582 to 0.826 and RMSE from 0.029 to 0.050 cm3 cm-3, indicating that the simulations agreed well with the observations. © 2013 Soil Science Society of China.


Liu M.-X.,CAS Nanjing Institute of Soil Science | Yang J.-S.,CAS Nanjing Institute of Soil Science | Li X.-M.,CAS Nanjing Institute of Soil Science | Yu M.,Water Conservancy Bureau of Yuhuatai | Wang J.,Wulanwusu Agro Meteorological Experiment Station
Journal of Integrative Agriculture | Year: 2012

More and more attention is being focused on saline water utilization in irrigation due to the shortage of fresh water to agriculture in many regions. For purpose of reducing the risks of using of saline water for irrigation, the mechanism of soil moisture and salinity distribution and transport should be well understood for developing optimum management strategies. In this paper, field experiments were carried out at Junggar Basin, China, to study the effects of drip irrigation water quality and drip tape arrangement on distribution of soil salinity and soil moisture. Six treatments were designed, including two drip tape arrangement modes and three irrigation water concentration levels (0.24, 4.68, and 7.42 dS m-1). Results showed that, soil moisture content (SMC) directly beneath the drip tape in all treatments kept a relatively high value about 18% before boll opening stage; the SMC in the narrow strip in single tape arrangement (Ms) plot was obviously lower than that in the double tapes arrangement (Md) plot, indicating that less sufficient water was supplied under the same condition of irrigation depth, but there was no significant reduction in yield. Mulching had not significant influence on salt accumulation but the drip tape arrangement, under the same condition of irrigation water depth and quality, compared with Md, Ms reduced salt accumulation in root zone and brought about relatively high cotton yield. © 2012 Chinese Academy of Agricultural Sciences.


Liu M.,CAS Nanjing Institute of Soil Science | Yang J.,CAS Nanjing Institute of Soil Science | Li X.,CAS Nanjing Institute of Soil Science | Liu G.,CAS Nanjing Institute of Soil Science | And 2 more authors.
Irrigation Science | Year: 2013

A 2-year experiment was carried out to investigate the effects of different drip irrigation regimes on distribution and dynamics of soil water and salt in north Xinjiang, China. Five treatments-F7 (0.24 dS m-1 + Once every 7 days), B7 (4.68 dS m-1 + Once every 7 days), S7 (7.42 dS m-1 + Once every 7 days), F10 (0.24 dS m-1 + Once every 10 days) and F3 (0.24 dS m-1 + Once every 3 days)-were designed. For all treatments, additional 150-mm fresh water was applied on 10th November in 2009 (winter irrigation) to leach the accumulated salt. The results revealed that irrigation frequency and water quality had significant effects on the spatial distribution and change of soil water content, soil salt and the crop water consumption rate, but had a limited impact on the seasonal accumulative water consumption, and the cotton yield decreased with the decrease in irrigation frequency and water quality on the whole. During the cotton growing season, results showed that the salt mainly accumulated in the 0- to 60-cm soil layer, while the soil salt in 60- to 100-cm layer changed slightly, indicating that the drip irrigation could not leach the soil salt out of the root zone under the irrigation regimes. Therefore, salt leaching was necessary to maintain the soil water-salt balance and to prevent excessive salt accumulation in the root zone. After the 150-mm winter irrigation and subsequent thawing, soil salts were leached into the deeper layers (below 60 cm), and the soil salt content (SSC) (EC1:5) in root zone in the next year was about 0.2 dS m-1. Moreover, compared to 2009 season, the SSC within the root zone did not increase even the EC of the irrigation water was up to 7.42 dS m-1. Additionally, it is important to note that the results were concluded based on the data of the 2-year experiment; further studies are need to optimize winter irrigation amount and assess the sustainability of saline water irrigation since long-term utilization of saline water may lead to soil degradation. © 2012 Springer-Verlag.


Liu M.-X.,CAS Nanjing Institute of Soil Science | Yang J.-S.,CAS Nanjing Institute of Soil Science | Li X.-M.,CAS Nanjing Institute of Soil Science | Yu M.,Yuhuatai Bureau of Water Conservancy | Wang J.,Wulanwusu Agro meteorological Experiment Station
Chinese Journal of Applied Ecology | Year: 2011

A 2-year(2009 and 2010) field experiment was carried out to investigate the effects of irrigation amount(300, 375, and 450 mm) and irrigation frequency(once every 3-, 7-, and 10 days) on the soil water distribution and cotton water use efficiency(WUE) under mulched drip irrigation in North Xinjiang. When the irrigation amount was 375 mm, irrigation once every 3 days induced a higher water content in surface soil(0-20 cm) in the whole growth season of cotton but made the deeper(below 40 cm) soil not moistened enough. Irrigation once every 10 days benefited the irrigation water penetrated downward or sideways and made the deeper soil have a higher water content; however, this drip irrigation did not replenish water in time, and made the surface soil water content lower. Overall, drip irrigation once every 7 days benefited the uniform distribution of irrigation water in soil profile. Under the same irrigation frequencies, the larger the irrigation amount, the higher the soil water content. The cotton water consumption in all treatments had the similar pattern, i. e., lower at seedling stage(averagely <1.7 mm·d-1), increased gradually since squaring stage and reached the maximum at full bloom stage(about 8.7 mm·d-1), and decreased at open-boll stage(about 1.0 mm·d-1). Under the natural condition, the total cotton water consumption had close correlation with irrigation amount but poor correlation with irrigation frequency, and the cotton WUE decreased significantly with increasing irrigation amount. When the irrigation amount was 300 mm, the WUE was higher but the yield production decreased markedly, whereas excessive irrigation(450 mm) had no significant yield-increasing effect but wasted water. It was suggested that irrigation with an amount of 375 mm and a frequency of once every 7- or 10 days could be an appropriate drip irrigation mode for the local cotton field under natural condition.


Liu M.,CAS Nanjing Institute of Soil Science | Yang J.,CAS Nanjing Institute of Soil Science | Li X.,CAS Nanjing Institute of Soil Science | Liu G.,CAS Nanjing Institute of Soil Science | And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2012

The effects of different drip irrigation parameters on crop growth and transportation of soil water and salinity are important for designing scientific irrigation strategies and rational utilization of water resources in arid area. Drip tape arrangement and irrigation water quality are two important factors of mulched drip irrigation. In order to investigate their influences on distribution of soil salinity and roots, and water use efficiency, field experiment was conducted in the north of Xinjiang in 2010. Two drip tape arrangements (a tap for four lines, Ms; a tap for two lines, Md) and three levels of irrigation water quality (0.24 dS/m, 4.68 dS/m, 7.42 dS/m) were designed. The results showed that drip tape arrangement played an important role in change of soil salinity and cotton roots distribution. Under the same condition of water quality, Ms reduced the salinity accumulation in root zone, and lower salinity concentration was observed in 0 ~ 40 cm soil layer of Ms treatment than that in Md treatment. Cotton roots mainly distributed in 0~40 cm layer in all the treatments. Stronger stress on cotton root growth was observed in Md treatment than in Ms treatment under irrigated with the same saline water. However, the saline water only affected the distribution area where the cotton root density was higher than 0.5 kg/m 3. The cotton water consumption appeared no significant relationship with the drip tape arrangement under the same irrigation amout, and decreased with the increase of irrigation salinity. Moreover, the saline water reduced the cotton yield but improved the water use efficiency (WUE); saline water irrigation reduced both the WUE and cotton yield in Md.

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