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- W2375794810 abstract "Soil salinization and fresh water shortages are major limiting factors for crop productions and environmental rehabilitation in coastal plains around the Bohai Sea.Improving saline soils in such areas can greatly benefit agricultural productions and environmental protection in the context of fast economic development across the coastal zones of the Bohai Sea.Based on the mechanism of water desalinization by freezing and thawing processes,a field experiment was designed and conducted to investigate the water and salt dynamic of coastal saline soil with freezing saline water irrigation in winter over coastal saline soils in Haixing County,Hebei Province.A total of 160 mm saline water was applied to experimental plots in January in year 2010,which was frozen well after irrigation under the condition of a lower temperature of-9.5℃.The soil surface was mulched with plastic film after the infiltration of melted saline ice water in order to prevent salt accumulation induced by high evaporation in spring.The plots were designed as follows:irrigation and plant directly with digging into plastic film mulching plots as T1,irrigation and plastic film mulching plots as T2,no irrigation and mulching plots as CK1,no irrigation and no mulching plots as CK2.In this experiment the H.Tuberosus was planted.Results showed that with infiltration of melted saline ice water,the surface soil was significantly desalinized.Compared to CK1 and CK2,the salt content in the surface soil(0～5 cm and 5～20 cm) of T1 and T2 was decreased 41.9%,65.0%,46.5%,67.7%,29.9%,47.1%,40.8% and 55.3%,respectively.The surface soil(0～5cm and 5～20cm) salt content was about 0.6% in the seedtime.The yields of H.Tuberosus of the T1 and T2 treatments were higher 54%,115%,97% and 175% than the treatments of CK1 and CK2.Under the T1 and T2 treatments,the Na+ and Cl-contents in root,stem and leaf were decreased and the K+ content and the ratio of K+/Na+ increased significantly.The results obtained in the study indicated that the approach of freezing saline water irrigation in winter may benefit the use of local saline groundwater and improve coastal saline soil to some degree,then increase the yield of H.Tuberosus.The ultimate effect depends on many natural and human factors,such as soil chemical and physical properties,water quality and irrigation time and quantity.Further field experiments are required to formulate reasonable irrigation scheduling and related management methods." @default.
- W2375794810 created "2016-06-24" @default.
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- W2375794810 date "2012-01-01" @default.
- W2375794810 modified "2023-09-23" @default.
- W2375794810 title "Effect of Freezing Saline Water Irrigation in Winter on Growth and Ion Distribution of Helianthus tuberosus L.in North Coastal Saline Soil" @default.
- W2375794810 hasPublicationYear "2012" @default.
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