JOURNAL OF NATURAL RESOURCES ›› 2016, Vol. 31 ›› Issue (10): 1764-1772.doi: 10.11849/zrzyxb.20151289

• Resource Evaluation • Previous Articles     Next Articles

Agricultural Utilization of Saline-alkaline Soil under the Constraint of Resources and Environment in Tianjin

WANG Xiu-li1, 3, GUAN Xiao-ke2, ZHANG Feng-rong3, LI Le4   

  1. 1. College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China;
    2. Social Development Research Center, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
    3. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;
    4. The Center for Land Comprehensive Improvement and Service, Dongying Bureau of Land and Resources, Dongying 257091, China
  • Received:2015-11-23 Revised:2016-02-23 Online:2016-10-20 Published:2016-10-20
  • Supported by:
    National Science and Technology Basic Project of the Ministry of Science and Technology of China, No.2012FY112100; Doctoral Starting up Foundation of Henan Agricultural University, China, No.30601018 National Natural Science Foundation of China, No.41501189

Abstract: With the sprawl of cities and towns and the spring-up of secondary and tertiary industries, more and more attentions have been paid to the development and utilization of saline-alkali soil in order to alleviate and partially solve the pressure on food safety and security, as well as natural resource and environment carrying capacity. The contradiction between urbanization and food supply in Tianjin has become much more severe with the culturable land and irrigating water shortage caused by the absorption of some urban functions and migrant labors from Beijing. The problems of environmental pollution and poor economic performance also came into existence. Properly using land for agricultural purpose without breaking out the carrying capacities of natural resources and environment has brought the requirement of utilizing local saline-alkali soil. In order to find out an effective method to solve the problem, this paper carried out systematic studies on the agricultural utilization of saline-alkali soil in Tianjin. From field survey and lab experiment data, it can be found that the total amount of saline-alkali soil in the study area is 32.42×104 hm2, and the main source that can be developed into farmland locates in the coastal plain areas. However, since traditional farming mechanism can’t maintain the arability of newly added farmland for a long period, these lands could turn back to the former conditions before development. The annual water deficit in Tianjin is about 6×108-9×108 m3. Water shortage has become the bottle neck for agricultural development. Irrigation desalting and traditional farming mechanism (e.g. the usage of chemical fertilizer and mulch etc.) will increase the water deficit and cause severe water supply disequilibrium, environment contamination and accumulation of poisonous waste. Furthermore, without scientific and sustainable fiscal inputs into agriculture, these newly added farmland may eventually be abandoned and turned into vacant and underutilized land. The changing socio-economic structure and urbanization have taken away the place of agriculture as the dominant industries in Tianjin. So, systematic consideration of regional resources, environment and benefits is the key during the process of saline-alkali soil development. From this point of view, water-cultured vegetable industry is the way of land development and soil improvements which can reduce the potential risks mentioned above and alleviate the pressure of food supply and environment protection.

Key words: agricultural utilization, constraint of resources and environment, saline-alkali soil, Tianjin, water cultured vegetable

CLC Number: 

  • F301.24