The Restoration Technology And Model Research Of The Suaeda Heteroptera Population

In recent years, the issue of land salinization becomes more and more serious. Allover the world, salt-affected area has accounted for more than25%of the whole landarea. China is one of the most serious salinization countries, and various types ofsalt-affected land’s area are about34.6million hectares. Planting some economichalophytes on these saline soils will not only improve and make good use of the landresources, but also will inevitably generate corresponding economic benefits.However, nowadays, the study about the restoration technology and mode ofhalophytes is still less.Suaeda heteroptera Kitag, belonging to Suaeda of the Chenopodiaceous family, isan annual herbaceous plant and also known as Suaeda salsa L. It is native to salinitysoil and always occurs in river, lakeside, desert and coastal regions. In China,S.heteroptera is a typical and popular halophyte and has very strong resistance, saltresistance in particular. S.heteroptera can be survival and complete its life cyclenormally in the areas where the salt content is lower than4.3%. It can absorb saltsfrom saline soils and accumulate them within the plant tissue to significantly decreasethe salt content. It is a potential ecological restoration species. Meanwhile, it is rich ina variety of nutrients in the body, such as amino acids, vitamins, fiber and othernutrients. Therefore, S.heteroptera has very high economical value, ecological valueand landscape value. However, with the development of economy, the S. heteropterapopulation had been degenerated and even died due to the increasing tidal flats area,seawater pollution and other human factors. Therefore, researching the restorationtechnology and model of S. heteroptera population is very significant.The west of Laizhou Bay (study area) is the core of the efficient economic zone. With the development of marine economy, the ecological environment of study area isbeing destroyed, and the habitat of S.heteroptera is also affected accordingly. Thestudy area we selected is representative.In this paper, the technical route mainly includes:(1) Determine the criticalhabitat indexes of S.heteroptera by consulting the literature and the help of experts’knowledge and experience.(2) Carry out the field survey. Set up A、B、C threesections in study area, and every section sets up five stations. Investigate every habitatindex of S.heteroptera and obtain preliminary data.(3) Determine the habitatsuitability assessment method and build HSI model.(4) Geographic InformationSystem (GIS) has powerful functions of spatial data processing and graphical display.Output the habitat suitability analysis diagram of S.heteroptera in study area with theaid of GIS and HSI model.(5) Divide the whole study area into study area I, studyarea II and study area III three parts according to the natural distribution ofS.heteroptera. Restore S.heteroptera population by adjusting measures to localconditions.(6) Conduct tracking evaluation at fixed period and observe the change ofgrowth, mature situation, population density and biomass.Result:(1) S.heteroptera population within the study area I has been restoredsuccessfully by adopting the method of “broadcast sowing in large area and reseedingin key area”.(2) S.heteroptera population within the study area II has beenconstructed successfully by adopting the method of “broadcast sowing planting”.(3)S.heteroptera population within the study area III has been constructed successfullyby adopting the method of “basal heightening and trench planting”.(4) Throughcalculation, the biomass of S.heteroptera in study area I、II、III has increased by23.1%,36.1%and23.1%, respectively.Taking the west of Laizhou Bay for example to study the restoration technologyand model of S.heteroptera population will provide reference material and scientificbasis for the further exploitation and utilization, environmental protection andenvironmental evaluation in saline areas and case analysis of restoration mode forother halophytes.