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| Effects of water application intensity of microsprinkler irrigation on water and salt environment and crop growth in coastal saline soils |
| CHU Lin-lin, KANG Yao-hu, WAN Shu-qin |
1、National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, P.R.China
2、Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Science and Natural Resources
Research, Chinese Academy of Sciences, Beijing 100101, P.R.China |
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摘要 Laboratory and field experiments were conducted to investigate the effects of water application intensity (WAI) on soil salinity management and the growth of Festuca arundinacea (festuca) under three stages of water and salt management strategies using microsprinkler irrigation in Hebei Province, North China. The soil water content (è) and salinity of homogeneous coastal saline soils were evaluated under different water application intensities in the laboratory experiment. The results indicated that the WAI of microsprinkler irrigation influenced the è, electrical conductivity (ECe) and pH of saline soils. As the WAI increased, the average values of è and ECe in the 0–40 cm profile also increased, while their average values in the 40–60 cm profile decreased. The pH value also slightly decreased as depth increased, but no significant differences were observed between the different treatments. The time periods of the water redistribution treatments had no obvious effects. Based on the results for è, ECe and pH, a smaller WAI was more desirable. The field experiment was conducted after being considered the results of the technical parameter experiment and evaporation, wind and leaching duration. The field experiment included three stages of water and salt regulation, based on three soil matric potentials (SMP), in which the SMP at a 20-cm depth below the surface was used to trigger irrigation. The results showed that the microsprinkler irrigation created an appropriate environment for festuca growth through the three stages of water and salt regulation. The low-salinity conditions that occurred at 0–10 cm depth during the first stage (−5 kPa) continued to expand through the next two stages. The average pH value was less than 8.5. The tiller number of festuca increased as SMP decreased from the first stage to the third stage. After the three stages of water and salt regulation, the highly saline soil gradually changed to a low-saline soil. Overall, based on the salt desalinization, the microsprinkler irrigation and three stages of water and salt regulation could be successfully used to cultivate plants for the reclamation of coastal saline land in North China.
Abstract Laboratory and field experiments were conducted to investigate the effects of water application intensity (WAI) on soil salinity management and the growth of Festuca arundinacea (festuca) under three stages of water and salt management strategies using microsprinkler irrigation in Hebei Province, North China. The soil water content (è) and salinity of homogeneous coastal saline soils were evaluated under different water application intensities in the laboratory experiment. The results indicated that the WAI of microsprinkler irrigation influenced the è, electrical conductivity (ECe) and pH of saline soils. As the WAI increased, the average values of è and ECe in the 0–40 cm profile also increased, while their average values in the 40–60 cm profile decreased. The pH value also slightly decreased as depth increased, but no significant differences were observed between the different treatments. The time periods of the water redistribution treatments had no obvious effects. Based on the results for è, ECe and pH, a smaller WAI was more desirable. The field experiment was conducted after being considered the results of the technical parameter experiment and evaporation, wind and leaching duration. The field experiment included three stages of water and salt regulation, based on three soil matric potentials (SMP), in which the SMP at a 20-cm depth below the surface was used to trigger irrigation. The results showed that the microsprinkler irrigation created an appropriate environment for festuca growth through the three stages of water and salt regulation. The low-salinity conditions that occurred at 0–10 cm depth during the first stage (−5 kPa) continued to expand through the next two stages. The average pH value was less than 8.5. The tiller number of festuca increased as SMP decreased from the first stage to the third stage. After the three stages of water and salt regulation, the highly saline soil gradually changed to a low-saline soil. Overall, based on the salt desalinization, the microsprinkler irrigation and three stages of water and salt regulation could be successfully used to cultivate plants for the reclamation of coastal saline land in North China.
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Received: 12 August 2014
Accepted:
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| Fund: This study was supported by the National High-Technology R&D Program of China (2013 BAC02B02 and 2013BAC02B01), the National Science Foundation for Young Scientists of China (51409126), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (1033000001), the Action Plan for Development of Western China of Chinese Academy of Sciences (KZCX 2-XB3-16). |
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Corresponding Authors:
KANG Yao-hu, Tel:+86-10-64856516,E-mail: Kangyh@igsnrr.ac.cn
E-mail: Kangyh@igsnrr.ac.cn
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| About author: CHU Lin-lin, Tel: +86-511-88981061, E-mail: LLchu5589@163.com; |
Cite this article:
CHU Lin-lin, KANG Yao-hu, WAN Shu-qin.
2015.
Effects of water application intensity of microsprinkler irrigation on water and salt environment and crop growth in coastal saline soils. Journal of Integrative Agriculture, 14(10): 2077-2089.
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