Zhao L.,Inner Mongolia Agricultural University |
Zhao L.,Hainan University |
Ma T.,Inner Mongolia Agricultural University |
Yu J.,Water Resources Research Institute of Inner Mongolia |
And 3 more authors.
Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering | Year: 2014
Inner Mongolia Dengkou pumping irrigation area was considered as the research object, of which channel water from Yellow River. The thickness of silting in front of the intake pumping station before opening and after stopping pump in four irrigation period was measured, and water draw rate and sediment concentration into the canal was tested during the pump working. The siltation features and into canal characteristics at water inlet were studied. Results show that the velocity ratio and diversion width of the Yellow River upstream of the intake are the main factors of influence on sediment into the canal, when the flow velocity is reducing, and diversion width is increasing, the influence of cross current is more intense when more bed sediment is brought into water intake. For the lateral intake, the water mainstream area is moving to the downstream. Under both effects of flat backflow and cross current, the bed sediment distribution thickness in front of water intake appears greater at intake upstream than downstream. The block sand bar in front of intake can effectively prevent the bed load into the canal, the results indicate that the top of the block sand bar is below the free surface within 1.6 m, not only the sediment into the canal can be greatly reduced, and the better flow regime can be obtained to prevent pump cavitation.
Zhou C.,Inner Mongolia Agricultural University |
Zhou C.,Economics and Finance Institute |
Shi H.,Inner Mongolia Agricultural University |
Yu J.,Water Resources Research Institute of Inner Mongolia
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2012
In order to study the seepage control performance of Geosynthetic Clay Liner (GCL) in lining channel in the cold and arid regions, the antifreeze characteristics of three different GCL (produced in Korea and China, 1#, 2#, 3#) were studied with indoor simulation method. The results showed that by hydrating with the Yellow River water and after 31 times of freeze-thaws, the free swelling volume of 1#?2#?3# GCL increased by 16.7%, 4.5% and 8.0% respectively; The filtration loss reduced by 31.1%, 28.9% and 27.0% respectively; The yield value increased by 200.0%, 23.3% and 90.6% respectively, and the EC values of the filtrate reduced by 27.3%, 27.0% and 31.0% respectively. The permeability coefficient increased by one order of magnitude, but was still small, which was 0.35-0.72% in canal bed. These indicated the GCL can be used in canal lining in the northwest arid and saline regions.
Wang Y.,Water Resources Research Institute of Inner Mongolia |
Wang S.,Water Resources Research Institute of Inner Mongolia |
Feng X.,Water Resources Research Institute of Inner Mongolia |
Cheng Z.,Water Resources Research Institute of Inner Mongolia |
Yun K.,Bureau of Hydrology and Water Resources Survey of Bayanhaote in Inner Mongolia
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2011
In order to probe the ecological groundwater table along the mainstream and in the downstream tributary-intensive areas of Ejina River, GPS, RS and GIS technology were applied to analyze the interactions between ground water table and different plant communities based on the data of observed long-term groundwater tables. The single point method was used in analysis of east-west river mainstream areas and west river downstream. The method of overlay between the groundwater table and the plant communities was used for analyzing east river downstream tributary-intensive areas. The results showed that the ecological ground water table was changed in different areas. It was estimated as 2.14 to 2.27 m in the east-west mainstream areas with a variable range of 0.61 to 1.14 m, 2.52 to 3.88 m in the west river downstream areas with a variable range of 0.90 to 1.09 m, and 2.48 to 3.39 m in the northern Andou Grassland areas with a variable range of 0.26 to 0.33 m. The different ground water depth associated with different plant communities in the tributary-intensive areas of the downstream of east river. Populus euphratica community appeared in the areas where the groundwater table was less than 3.0 m with a variable range of 0.51 to 1.41 m. Tamarix ramossima community appeared in the areas where the groundwater table was 3.0 to 6.0 m with a variable range of 0.85 to 1.94 m, and weed habitat appeared in the areas where the groundwater table was 3.0 m with a variable range of 1.41 to 2.46 m. The results are helpful for the allocation of surface water in Ejina eco-irrigation district.
Yang W.,Yangtze University |
Yang W.,China Agricultural University |
Zhu J.,Yangtze University |
Wu Q.,Yangtze University |
And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2015
In the middle and lower reaches of Yangtze River, China, rain-waterlogging and high temperature occur simultaneously and have a high probability after rainfall in summer. Thus, they are the two limiting factors for cotton growth. It is unclear about the response of cotton to waterlogging under high temperature stress. This study investigated the growth and physiological metabolism characteristic of cotton seedlings under combination of waterlogging and heat stress. A pot experiment was conducted in Jingzhou, China during the growing season of cotton in 2013 using two-factor completely randomized block. Waterlogging and high temperature were designed as treatments. Waterlogging treatments included 0, 3, 6 and 9 days and the heat stress experienced continually for 0 and 3 days during the cotton seedling stage. Principal morphological indexes, chlorophyll fluorescence parameters and antioxidant enzymes of plants were measured at the end of experiment. The results showed that: 1) Morphological parameters of cotton crops were not significantly affected by high temperature stress when waterlogging duration was less than 3 days; but when waterlogging lasted for 3 days above, the constant high temperature condition could lower the plant height, leaf area and dry matter weight, and the roots to shoot ratio; the changes in these parameters induced by waterlogging under high temperature were generally 3 days earlier than that under the regular temperature; 2) The photosynthetic physiological indexes of the fourth leaves including chlorophyll (Chl) a, Chl b and photosystem II variable fluorescence to maximum fluorescence ratio, and fluorescence to original fluorescence ratio decreased with increasing waterlogging duration under the high temperature condition, but the ratio of Chl a and Chl b remained the same; 3) Under the natural temperature conditions, the antioxidant enzymes in roots and leaves including the superoxide dismutase (SOD) and peroxidase (POD) activity rapidly declined with the increment of waterlogging days, whereas malondialdehyde (MDA) was opposite; 4) Affected by the interactive effects of waterlogging and high temperature, the SOD and POD activities of leaves increased firstly and then decreased, their maximum and minimum values all occurred in the 3 and 9 days of waterlogging; the MDA content was increased obviously, indicating that the heat stress aggravated cell membrane damage degree; and 5) The waterlogging stress was the main limiting factor of cotton growth in the seedling stage, followed by heat stress; Moreover, there existed the significant interaction effects of Chl, Chl a, the ratio of Chl a and Chl b, and PS II maximum photochemical quantum yield as well as SOD, POD and MDA of leaves under the interactive influence of high temperature and waterlogging. The research may provide data support for cotton stress-resistance cultivation and drainage management in the middle and lower reaches of China. © 2015, Chinese Society of Agricultural Engineering. All right reserved.
Li Q.,Inner Mongolia University |
Liu J.,Inner Mongolia University |
Zhang L.,Inner Mongolia University |
Chen Q.,Agriculture and Agri Food Canada |
And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2013
To explore drought resistant effects of water-retaining agent, straw mulch and plastic film mulch between lines on osmotic substances and plasmas membrane system and yield of potato under dry farming, potato variety 'Shepody' was used, and totally six treatments such as straw mulch, plastic film mulch between lines, control group, and combined with water-retaining agent were set in the field experiment. The results showed that the value of plasmas membrane permeability was larger at seedling stage, then decreased and increased again from tuber bulking stage. Contents of proline and malonaldehyde presented a gradual increment trend in different growth stages, but content of soluble sugar showed a single-peak curve change. Lower contents of osmotic regulation substances and plasmas membrane permeability were observed in the treatments of plastic mulch between lines combined with water-retaining agent, water-retaining agent, straw mulch, and straw mulch combined with water-retaining agent, all these treatments released drought stress efficiently. Potato growth anaphase, till starch accumulation stage, proline content, soluble sugar content, plasma membrane permeability and malondialdehyde content changes were relatively stable. Compared with control group, the four indexes of plastic mulch between lines combined with water-retaining agent treatment decreased by 15.57%, 6.90%, 42.79% and 17.69%, respectively. The four indexes of water-retaining agent treatment decreased by 2.31%, 5.17%, 10.62% and 8.04%, respectively, which of straw mulch treatment decreased by 28.45%, 3.45%, 51.63% and 25.58%, respectively, and 25.14%, 12.07%, 49.17% and 22.58%, respectively for straw mulch combined with water-retaining agent treatment. At potato mature stage, soil moisture content under straw mulch combined with water-retaining agent treatments changed stably, 0-20 cm soil moisture content under water-retaining agent treatment was higher than that without water-retention agent treatments. Straw mulch combined with water-retaining agent, plastic mulch between lines combined with water-retaining agent and water-retaining agent treatments increased yield and commodity tuber rate of potato significantly (P<0.05). In all, straw mulch treatment decreased drought stress mostly, straw mulch combined with water-retaining agent, plastic mulch between lines combined with water-retaining agent and water-retaining agent treatments relieved drought stress obviously, and promoted potato growth and development and yield effectively.