Site Quality Evaluation Of The Saline Alkali Soil In Daqing

This research takes the saline alkali soil of Daqing area on the SongNen Plain as the object of study.The saline alkali soil of Daqing be divided into five kinds,through the detailed investigation and classification to the study region,analysis the leading factors by the factor analytic method and the cluster analytic method.Names the five kind of saline and alkali land basis biomass and the salinization degree,high biomass mild saline land,higher biomasses moderate degree,medium biomass moderate saline land,low biomass moderate saline land, severe saline land.Establishes Site quality evaluation table of Daqing saline alkali land and carries on the vertical classification and the Site quality evaluation to Daqing saline alkali land.Aneurolepidium chinense,Puccinellia tenuifora,Heteropappus hispidus is the representative plant on the high biomass mild saline land.The salinization degree of soil is light,may use the high economic grass to carry on the soil improvement and the forage production in this kind soil.Echinochloa crusgalli,Artemisia tanacetifolia,Calamagrostis pseudophragmites and plentiful cover plants is the representative plant on the higher biomasses moderate degree.The salinization degree of soil is heavy,may plant the grass that be able to bear the salt toxicity and is the low economic value to improvement the soil(e.g.:Echinochloa crusgall.),the mild salinization degree soil of this kind can plant the economic grass for forage production in this kind soil.Elymus dahuricus Turcz.,Viola yedoensis Makino,Puccinellia tenuiflora is the representative plant on the medium biomass moderate saline land.The saline degree of soil is heavy,in this kind soil,may plant the grass that is able to bear the salt toxicity and is the low economic value to improvement the soil(e.g.:Elymus dahuricus Turcz.).Calamagrostis pseudophragmites,Heteropappus hispidus,Taraxacum sinicum Kitag., Imperata,cylindrica is the representative plant on the low biomass moderate saline land.The salinization degree of soil is heavy,in this kind soil,may plant the grass that be able to bear the salt toxicity and is the low economic value to improvement the soil(e.g.:Calamagrostis pseudophragmites.),the soil can not conform to the yield condition that should use fertilizer and organic fertilizer to carry on the soil amelioration.There isn't any plant on the severe saline land,as plants can not bear the salinization degree of the land.Technical measures should be taken by agriculture,biology and chemistry approaches for the soil amelioration and vegetation restoration.