Key Laboratory of Oasis Ecology and Desert Environment

Yingbazha, China

Key Laboratory of Oasis Ecology and Desert Environment

Yingbazha, China

Time filter

Source Type

Zhang P.,Xinjiang Institute of Ecology and Geography | Zhao X.,Xinjiang Institute of Ecology and Geography | Zhang T.,Station of Forestry Management | Zhang G.,Tieganlike Weather Station in Korla | And 5 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011

For clarifying the effect of irrigation on distribution characteristics of soil water and salinity and extending scope of root in condition of different distance of emitter, different irrigated years and different forest age, open country monitoring method, was used this paper carried out the comparison test in Kalamiji oasis in the lower reaches of Tarim River, northwest of China. The results showed that: the growth of forestry root was not hampered under the present irrigation schedule, but the root distribution moved up under the drip irrigation. This paper proposed that: production in the future, narrow distance of emitter could been use in most recent several years planter which may leach salinity apparently; Although the effect depth of drip irrigation in previous three years basically has not hindered the root growth of Elaeagnus angustifolia and the more years of irrigation the deeper of leaching depth following the age of forest, the leaching scope where the shelter forest root extending is partial, the suggestion spate flooding irrigation once a year.


Zhao X.,Xinjiang Institute of Ecology and Geography | Zhao X.,Key Laboratory of Oasis Ecology and Desert Environment | Xu H.,Xinjiang Institute of Ecology and Geography | Xu H.,Chinese Academy of Sciences | And 3 more authors.
Water and Environment Journal | Year: 2013

Because of the shortage of water source in the extreme arid area, generally, there are several years of no irrigation on mature shelterbelts. In this study, the shelterbelt soil in different texture were compared based on distribution analysis of the soil moisture and salt levels of shelterbelts under large-scale drip irrigation in Kalamiji Oasis in the lower reaches of Tarim River, Northwest China. The following conclusions were drawn. (1) In Kalamiji Oasis, the groundwater level declined at a rate of 0.5m/a as a result of popularization of drip irrigation technology. (2) There was a larger heterogeneity in distribution for soil moisture in the sandy/loamy shelterbelt than in the clay shelterbelt. (3) Under non-irrigation conditions, sandy/loamy shelterbelt has lower soil moisture and salinity, and clay shelterbelt has higher soil moisture and salinity. (4) The shelterbelt with the shallowest groundwater depth had highest soil moisture level, and the shelterbelt with the deepest groundwater level had the lowest soil moisture content. (5) In sandy and loamy shelterbelts, the shelterbelts with the shallowest groundwater depths had the lower salinity levels and the shelterbelts with the deepest groundwater depths had the highest salinity levels. (6) In clay shelterbelts, the shelterbelts with the shallowest groundwater depths had the highest salinity levels, and the shelterbelts with the deepest groundwater depths had the lowest salinity levels. Additionally, it is essential to implement irrigation at least once a year. © 2012 CIWEM.


Zhao X.,Xinjiang Institute of Ecology and Geography | Xu H.,Xinjiang Institute of Ecology and Geography | Xu H.,Chinese Academy of Sciences | Xu H.,Key Laboratory of Oasis Ecology and Desert Environment | And 3 more authors.
Water and Environment Journal | Year: 2014

Soil salinity level in shelterbelts under different emitter distance and different planting years was compared using 3 years of monitoring data from a typical oasis located in an extremely arid area in northwest China. The variation trend of salinity level during the whole growing season and in nonirrigation season was analysed. The results indicate that: (1) under narrow emitter distance (1.5m), the soil layer with the highest salinity level was located deepest (50-85cm). Under wide emitter distance (3m), the soil layer with the highest salinity level was located shallower (45-80cm); (2) drip irrigation effectively decreased the soil salinity level. With the increased in irrigating years, the salt-leaching effect was better. Most of the soil salts were brought downward to the soil layer below 30cm, 50cm and 70cm, respectively, in shelterbelts that have been irrigating for 1 year, 2 years and 3 years; (3) soil salinity level presented an increasing trend during the growing season. The largest change of soil salinity level fore-and-aft the irrigation was found in 20-cm depth, followed by the 40-cm depth and then the 60-cm depth; (4) in nonirrigation season, salt was accumulating at the surface in shelterbelts. Among all the shelterbelts with different forest age, the salinity level on the surface was the highest in the 2-year-old shelterbelt. © 2013 CIWEM.


Zhao X.,Xinjiang Institute of Ecology and Geography | Zhao X.,Key Laboratory of Oasis Ecology and Desert Environment | Xu H.,Xinjiang Institute of Ecology and Geography | Xu H.,Key Laboratory of Oasis Ecology and Desert Environment | And 7 more authors.
Quaternary International | Year: 2013

Fertilization (CK, N, P, K, NP, NK, PK, NPK) and watering (CK, rain, snow) were applied to a desert grassland of northwest Xinjiang, China. Results showed that: (1) After nutrient and water additions for one year, the plant community structure changed, the individual number of Graminoids increased significantly, while the individual number of Cruciferaes decreased sharply. The total species number was 16 before the treatment and 10 after the treatment, reduced by 37.5%. (2) The vegetation coverage above ground and the plant density increased significantly under the additions of NP and NPK (. p < 0.05), while the other nutrient additions had no significant effects on the vegetation coverage and density. Neither additional snow addition nor rain had significant effects. (3) Compared with the control (CK), the additions of N, P and PK increased the diversity indexes (. D & H') and Evenness (. J); the additions of K, NP, NK and NPK decreased the diversity indexes (. D & H') and evenness (. J). However, neither of the treatments has significant effect on the diversity indexes and Evenness based on the ANOVA (. p < 0.05). (4) Snow significantly decreased the plant species richness (. p < 0.05). However, neither the rain nor the nutrient addition has significant effect on the species richness. (5) The inter-annual variation trend of the diversity indexes (. D & H') and Evenness (. J) showed an increasing trend during 2009-2012. © 2012 Elsevier Ltd and INQUA.

Loading Key Laboratory of Oasis Ecology and Desert Environment collaborators
Loading Key Laboratory of Oasis Ecology and Desert Environment collaborators