Ecosystem water use efficiency for a sparse vineyard in arid northwest China

Li, Sien; Kang, Shaozhong; Zhang, Lu; Du, Taisheng; Tong, Ling; Ding, Risheng; Guo, Weihua; Zhao, Peng; Chen, Xia; Xiao, Huan

doi:10.1016/j.agwat.2014.08.011

Cited by 48 publications

(23 citation statements)

References 39 publications

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“…However, the land use/cover conditions at sites are generally stable, and only the response of E T to vegetation phenological change can be observed, such as the E T variations in grassland (Y. Zhang et al, 2005), mixed plantation (cork oak, black locust, and arborvitae) (Tong et al, 2017), vineyard (Li et al, 2015), and grazed steppe (Chen et al, 2009;Vetter et al, 2012). Continuous field observations under both land degradation and vegetation rehabilitation processes have rarely been documented, especially in the semiarid shrubland.…”

mentioning

confidence: 99%

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

Gong

Lei

Yang

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Evapotranspiration (E T ) is an important process in the hydrological cycle, and vegetation change is a primary factor that affects E T . In this study, we analyzed the annual and inter-annual characteristics of E T using continuous observation data from eddy covariance (EC) measurement over 4 years (1 July 2011 to 30 June 2015) in a semiarid shrubland of Mu Us Sandy Land, China. The Normalized Difference Vegetation Index (NDVI) was demonstrated as the predominant factor that influences the seasonal variations in E T . Additionally, during the land degradation and vegetation rehabilitation processes, E T and normalized E T both increased due to the integrated effects of the changes in vegetation type, topography, and soil surface characteristics. This study could improve our understanding of the effects of land use/cover change on E T in the fragile ecosystem of semiarid regions and provide a scientific reference for the sustainable management of regional land and water resources.

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confidence: 99%

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

Gong

Lei

Yang

et al. 2017

Hydrol. Earth Syst. Sci.

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“…The seasonal and inter-annual change in the rate of photosynthesis for this cultivated cardoon crop is controlled by variation in amount of green leaf area (Rana et al, 2016a). The relationship between CO2 flux and LAI is often used to examine the role of leaf area in the crop water use at ecosystem level (Suyker and Verma, 2010;Li et al, 2015), for our case of study it is reported in Figure 4: each point represents the values of LAI and CO2 flux cumulated in the day when LAI is measured (10 and 11 sample days for WS and DS, respectively). Data relative to the senescence phase are excluded from the linear regression analysis, since only green leaves participate to the vapour and carbon dioxide stomatal regulation, as above reported.…”

Section: Daily Scalementioning

confidence: 99%

“…The water use efficiency and the canopy resistance Following Baldocchi (1994), Vanloocke et al (2012), Zeri et al (2013) and Li et al (2015) the WUE (gCO2 kgH2O -1 ) at ecosystem scale is defined as the ratio between NEE and ET:…”

Section: Articlementioning

confidence: 99%

Carbon and water dynamics of a bioenergy crop (Cynara cardunculus L.) under different meteorological conditions in a semi-arid region

2017

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To evaluate the environmental adaptability of cultivated cardoon (Cynara cardunculus L.) its water use efficiency [(WUE) -ratio between net ecosystem exchange (NEE) and evapotranspiration (ET)] was analysed. The crop was cultivated in South Italy and WUE was evaluated at different time scales during two seasons: wet and dry. Even if the crop development is similar in the two seasons, plants delay their development in the presence of drought, showing, in this way, an improvement in their adaptability. Seasonal WUE in the dry season is greater than in the wet one by +11.2%, and this is also confirmed at monthly and daily scale. Hourly analysis around the full development phase shows that WUE is greater during the wet season than during the dry one, this being explainable when considering the impact of the drivers [(photosynthetically active radiation (PAR), vapour pressure deficit (VPD), and air temperature (Tair)] on CO2 and H2O exchanges by stomatal regulation. The saturation values of NEE in function of PAR (threshold 2.5 MJ m -2 h -1 ) and VPD (threshold 10 hPa) are greater during the wet season than the dry one.Furthermore, also the linear relationships between ET and PAR and VPD showed higher slopes in the wet season than in the dry one. Drought causes reduction in both photosynthesis and evapotranspiration by stomatal regulation, however, the photosynthesis process is surely more sensitive to water stress than the crop transpiration, thus demonstrating the good adaptability of this crop to scarce water availability of semi-arid conditions.

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“…The experimental site is in an inland arid desert climate zone where light and heat resources are abundant, with mean annual duration of sunshine of over 3000 h, mean frost free days of over 150 days, mean annual temperature of 8°C and annual accumulated temperature ( > 0°C) of 3550°C. The site had limited water resources, with annual precipitation of 164 mm, mean annual pan evaporation approximate of 2000 mm, and the groundwater table was below 25 m [36] . The soil texture was a light sandy loam, with mean soil dry bulk density of 1.40 g$cm -3 , mean field capacity (FC) 0.30 cm 3 $cm -3 and mean permanent wilting point 0.10 cm 3 $cm -3 for the 0-100 cm layers.…”

Section: Experimental Site and Descriptionmentioning

confidence: 99%

Effects of irrigation and nitrogen management on hybrid maize seed production in north-west China

Rong¹,

Kang²,

Li³

et al. 2016

Front. Agr. Sci. Eng.

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Scientific irrigation and nitrogen management is important for agricultural production in arid areas. To quantify the effect of water and nitrogen management on yield components, biomass partitioning and harvest index (HI) of maize for seed production with plastic filmmulching, field experiments including different irrigation and N treatments were conducted in arid north-west China in 2013 and 2014. The results indicated that kernel number per plant (KN) was significantly affected by irrigation and N treatments. However, 100-kernel weight was relatively stable. Reducing irrigation quantity significantly increased stem partitioning index (PI stem ) and leaf partitioning index (PI leaf ), and decreased ear partitioning index (PI ear ) at harvest, but lowering N rate (from 500 to 100 kg N$hm -2 ) did not significantly reduce PI stem , PI leaf , and PI ear at harvest. HI was significantly reduced by reducing irrigation quantity, but not by reducing N rate. Linear relationships were found between KN, PI stem , PI leaf , PI ear at harvest and HI and evapotranspiration (ET).

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Ecosystem water use efficiency for a sparse vineyard in arid northwest China

Cited by 48 publications

References 39 publications

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

Monitoring the variations of evapotranspiration due to land use/cover change in a semiarid shrubland

Carbon and water dynamics of a bioenergy crop (Cynara cardunculus L.) under different meteorological conditions in a semi-arid region

Effects of irrigation and nitrogen management on hybrid maize seed production in north-west China

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