Effects of water application intensity of microsprinkler irrigation on water and salt environment and crop growth in coastal saline soils

作     者：CHU Lin-lin KANG Yao-hu WAN Shu-qin 

作者机构：National Research Center of Pumps Jiangsu University Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Science and Natural Resources Research Chinese Academy of Sciences 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2015年第14卷第10期

页      面：2077-2089页

核心收录：

学科分类：082802[工学-农业水土工程] 08[工学] 09[农学] 090101[农学-作物栽培学与耕作学] 0710[理学-生物学] 0832[工学-食品科学与工程（可授工学、农学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0905[农学-畜牧学] 0828[工学-农业工程] 0906[农学-兽医学] 0901[农学-作物学] 0703[理学-化学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：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) 

主　　题：coastal saline soil microsprinkler irrigation water application intensity soil salinity water and salt regulation reclamation 

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 p H 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 p H 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 p H, 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 k Pa） continued to expand through the next two stages. The average p H 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 desa