Effect of population pressure on oasis agriculture (1984–2003) in Jinta Oasis, arid Northwestern China

Abstract Assessing the spatial variability of soil water content is important for precision agriculture. To measure the spatial variability of the soil water content and to determine the optimal number of sampling sites for predicting the mean soil water content at different stages of the irrigation cycle, field experiments were carried out in a potato field in northwestern China. The soil water content was measured in 2016 and 2017 at depths of 0–20 and 20–40 cm at 116 georeferenced locations. The average coefficient of variation of the soil water content was 20.79% before irrigation and was 16.44% after irrigation at a depth of 0–20 cm. The spatial structure of the soil water content at a depth of 20–40 cm was similar throughout the irrigation cycle, but at a depth of 0–20 cm a relatively greater portion of the variation in the soil water content was spatially structured before irrigation than after irrigation. The autocorrelation of soil water contents was influenced by irrigation only in the surface soil layer. To accurately predict mean soil moisture content, 40 and 20 random sampling sites should be chosen with errors of 5% and 10%, respectively.

Download Full-text

Spatiotemporal variability of alpine precipitable water over arid northwestern China

Hydrological Processes ◽

10.1002/hyp.13835 ◽

2020 ◽

Vol 34 (16) ◽

pp. 3524-3538 ◽

Cited By ~ 1

Author(s):

Lei Wu ◽

Changbin Li ◽

Liuming Wang ◽

Zhibin He ◽

Yuan Zhang ◽

...

Keyword(s):

Precipitable Water ◽

Northwestern China ◽

Spatiotemporal Variability ◽

Arid Northwestern China

Download Full-text

Impact of recent climatic change on the yield of winter wheat at low and high altitudes in semi-arid northwestern China

Agriculture Ecosystems & Environment ◽

10.1016/j.agee.2008.02.007 ◽

2008 ◽

Vol 127 (1-2) ◽

pp. 37-42 ◽

Cited By ~ 42

Author(s):

Guoju Xiao ◽

Qiang Zhang ◽

Yubi Yao ◽

Hong Zhao ◽

Runyuan Wang ◽

...

Keyword(s):

Winter Wheat ◽

Climatic Change ◽

Northwestern China ◽

High Altitudes ◽

Recent Climatic Change ◽

Arid Northwestern China ◽

Semi Arid

Download Full-text

Effects of film-bottomed treatment on seedling emergence and growth of agana korshinskiiarid northwestern China

Plant Soil and Environment ◽

10.17221/206/2009-pse ◽

2010 ◽

Vol 56 (No. 4) ◽

pp. 186-193

Author(s):

X. Zhou ◽

Y. Yan ◽

Ch. Wan ◽

H. Wang ◽

L. Wu ◽

...

Keyword(s):

Soil Moisture ◽

Seedling Emergence ◽

Maximum Growth ◽

Northwestern China ◽

Promoting Effect ◽

Basal Diameter ◽

Shoot Height ◽

Caragana Korshinskii ◽

Arid Northwestern China ◽

Emergence Percentage

A field study was conducted to study the effectiveness of film-bottomed treatment (FBT) on the seed germination and seedling establishment of <I>Caragana korshinskii</I> Kom. in the arid Hexi Corridor of northwestern China in 2007 and 2008. The experiment involved three different depths of film-bottomed treatments (DFBT) (80, 90 and 100 cm) and a control with twelve replications in each treatment. Soil moisture, seedling emergence percentage, leaf characteristics, shoot height, main root length, basal diameter, biomass, biomass allocation, as well as root system distribution, were studied and were found to be significantly higher with FBT in respect to the check (CK) values. Soil moisture content increased with depths of film-bottomed treatments. Our study demonstrates that <I>C. korshinskii</I> can be grown successfully using FBT in arid areas and 90 cm DFBT gives the maximum growth-promoting effect.

Download Full-text