Fruit trees and vegetables for arid and semi-arid areas in north-west China

1986 ◽  
Vol 11 (1) ◽  
pp. 3-16 ◽  
Author(s):  
Wang Ming ◽  
Sun Yun-wei
Keyword(s):  
Fruit Trees ◽  
Arid Areas ◽  
West China ◽  
North West ◽  
Semi Arid

Effects of rotational tillage practices on soil water characteristics and crop yields in semi-arid areas of north-west China

Soil Research ◽  
2011 ◽  
Vol 49 (7) ◽  
pp. 625 ◽  
Author(s):  
Xianqing Hou ◽  
Zhikuan Jia ◽  
Qingfang Han ◽  
Rong Li ◽  
Wei Wang ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Crop Yields ◽  
Arid Areas ◽  
No Tillage ◽  
West China ◽  
North West ◽  
Use Efficiency ◽  
Semi Arid

Winter wheat (Triticum aestivum L.) is a major crop grown generally in semi-arid areas of north-west China, and water deficiency is the major factor that limits crop yields. Between 2007 and 2010, we conducted a field experiment on winter wheat to investigate the effects of interval with no-tillage and subsoiling (rotational tillage) after crop harvesting on soil water characteristics and crop yields in semi-arid areas of southern Ningxia. Three tillage treatments were tested: no-tillage in year 1, subsoiling in year 2, and no-tillage in year 3 (NT/ST/NT); subsoiling in year 1, no-tillage in year 2, and subsoiling in year 3 (ST/NT/ST); and conventional tillage over years 1–3 (CT). The three-year comparative experiment showed that during the summer fallow, compared with CT, the NT/ST/NT and ST/NT/ST treatments improved mean soil water content at 0–2.0 m depth by 3.9% and 7.8%, respectively, and significantly (P < 0.05) increased mean rainfall storage efficiency by 15.4% and 26.7%. During the wheat growing season, mean soil water content with the NT/ST/NT and ST/NT/ST treatments was significantly higher (P < 0.05) than with the CT treatment (8.0% and 8.6% higher, respectively), and the two rotational tillage treatments significantly (P < 0.05) increased mean rainfall use efficiency compared with CT (by 9.3% and 10.7%, respectively). Yield improvements coupled with greater water-use efficiency occurred with the NT/ST/NT and ST/NT/ST treatments, i.e. mean grain yields were significantly (P < 0.05) increased by 9.6% and 10.7%, respectively, and water-use efficiency was significantly (P < 0.05) improved by 6.7% and 7.8% compared with the CT treatment. The results showed that the interval of no-tillage and subsoiling could improve soil status, and significantly increase crop yields and water-use efficiency. This method could have important applications in the semi-arid areas of north-west China.

scholarly journals Variability of serum reproductive hormones in cows presenting various reproductive conditions in semi-arid areas of the North West Province, South Africa

2020 ◽  
Vol 13 (3) ◽  
pp. 502-507
Author(s):  
K. Molefe ◽  
M. Mwanza
Keyword(s):  
South Africa ◽  
Vaginal Prolapse ◽  
Arid Areas ◽  
Blood Samples ◽  
Hormonal Profile ◽  
Retained Placenta ◽  
North West ◽  
The North ◽  
Downer Cow Syndrome ◽  
Semi Arid

Background and Aim: Hormones play a significant role in supporting reproductive processes. Predisposition to metabolic disorders may result from biological alterations in the neurohormonal system, thus leading to impaired immune function and poor reproductive performance. The aim of this study was to determine the reproductive hormonal profile in cows with reproductive conditions in semi-arid areas of the North West Province, South Africa, to establish possible correlations between different conditions and the hormonal profile. Materials and Methods: Blood samples were collected from cows in different communal areas of Mafikeng. Convenience sampling was used to collect samples for the study. Blood samples were collected cows experiencing dystocia (n=50), retained placenta (n=13), downer cow syndrome (n=34), vaginal prolapse (n=16), and abortions (n=69), following cases reported at the Animal Health Hospital of the North-West University, Mafikeng Campus. Descriptive statistics, such as mean and standard deviations, were used to describe the distribution of hormone levels across reproductive conditions. p-value less than the significance level was set at 5% (p<0.05). Results: Data obtained revealed significantly higher estradiol in abortion (1122.99±71.99 pg/ml), downer cow syndrome (781.32±135.7 pg/ml), and dystocia (862.09±123.44 pg/ml). Oxytocin (OT) differed significantly in cows with dystocia (370.50±71.66 pg/ml) and abortion (574.73±60.65 pg/ml). Significantly low progesterone (Pg) was observed in abortion (2.45±1.509 ng/ml) and dystocia (8.59±0.402 ng/ml) while increased prostaglandin alpha was observed in cows with vaginal prolapse and abortion. Conclusion: The findings highlight an increase in serum estradiol and OT in aborting cows. Low Pg and estradiol in cows with vaginal prolapses and retained placenta were noted. An association was seen between downer cow syndrome and high concentrations of estradiol and Pg. Prostaglandin alpha may increase in cases of vaginal prolapse and abortion. Hormonal alterations were observed and may contribute to the incidences of different reproductive conditions.

TBE in China

2020 ◽  
Keyword(s):  
Western China ◽  
Ixodes Persulcatus ◽  
West China ◽  
North West ◽  
Haemaphysalis Concinna ◽  
Viral Subtype ◽  
Japanese Military ◽  
Natural Foci ◽  
Far Eastern ◽  
The Brain

The first TBE patients in China were reported in 1943, and the TBEV was isolated from the brain tissues of 2 patients in 1944 by Japanese military scientists,1 and from patients and ticks (Ixodes persulcatus and Haemaphysalis concinna) in 1952 by Chinese researchers.2 The Far Eastern viral subtype (TBEV-FE) is the endemic subtype that has been isolated from all 3 known natural foci (northeastern China, western China, and southwestern China).14 Recently a new “Himalayan subtype” of the TBEV (TBEV-HIM) was isolated from wild rodent Marmoata himalayana in the Qinghai-Tibet Plateau15. The main vector of the TBEV in China is I. persulcatus.3 One recent report suggests that the TBEV-SIB is prevalent in the Uygur region (North West China)13 but epidemiological modelling indicates that the TBEV may occur even widely all over China (Figure 3).4 Likely, the disease is often missed by clinicians due to a lack of the availability of specific diagnostic assays16.

Environmental control of germination and dormancy of seeds of two cytotypes of Lygeum spartum L., a perennial grass of semi-arid and arid areas in Algeria

2010 ◽  
Vol 36 (1) ◽  
pp. 89-98 ◽  
Author(s):  
Abderazak Djabeur ◽  
Meriem Kaid-Harche ◽  
Daniel Côme ◽  
Françoise Corbineau
Keyword(s):  
Environmental Control ◽  
Perennial Grass ◽  
Arid Areas ◽  
Semi Arid
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