The Research On The Coupled Relation Between Pod Quinoa Community Characteristics And Soil Environmental Factors Of Qitai Oasis

In this paper,Sloping plain area north of the qitai oasis as a study area,Set of66sampling points in the study area,Acquisition pod Chenopodium albumcover,abundance,plant height,crown length,crown width,leaf size,root length,fruit sizeand number of growth indicators,Collection the0～20cm20～60cm and60～100cmthree-layer soil samples,The laboratory test determination of each layer of soil pH,saltcontent（HCO3^-,CI^-,SO4²-,Ca²+,Mg²+,K⁺,Na⁺） and Soil moisture and soilcharacteristics data,First,using soil data for statistical analysis on thecharacteristics,Found that the variation.Second,Pod quinoa where the sample pointsoil data,the spatial variability analysis,Understand the law of its spatialvariability,Finally,to explore the relationship between pod pigweed growth attributesand indicators of soil characteristics,Provide some reference to the improvement ofthe fragile environment of the study area.From descriptive statistical analysis to see,The study area of Ceratocarpus pod isan alkaline soil strong alkaline soil and strong alkaline soil. Along with the increase ofsoil depth alkaline soil quantity reduced gradually.Strong alkaline soil is increasing.The number of extremely strong alkaline soil also reduce trend.Three layer soil pHvalue of the average difference is small.The coefficient of variation does not exceed10%are weak variability;With the deepening of the soil depth gradually weakened thedegree of soil salinization.From saline soil,moderate soil salinization and severesalinization of the soil tend to be non-saline soil and mild salinization of soil;Threesoil salt ion contains the most is SO₄²-,followed by Na⁺,then CI^-,Their contentgradually decreasing trend with soil depth deepened.Salt ion of spatial variation isvery significant.Which are only a few salt ion to belong to medium variability.Mostsalt ion all belong to strong variability.The moisture content of the soil with soil depthincreases to increase gradually and the coefficient of variation of reduce gradually.Among which a layer of belong to weak variability.The other two layer allbelong to strong variability.The study area0～20cm20to60cm and60～100cm three layer of soil dataspace mutation characteristics as follows:0～20cm and60～100cm soil pH valuespatial correlation medium.20to60cm soil pH value spatial correlation weakly.Thesoil salt ion,20to60cm and60～100cm two layer HCO3-present moderaterelated.0～20cm HCO3-correlation weakly.HCO3-in the surface soil spatialdistribution is mainly composed of random factors decision.20to60cm and60～100centimeters of HCO₃^-distribution are mainly decided by such as terrain soil organicand natural factors.Random factors also to have certain effect.Cl^-,SO₄²-,Ca²+,Mg²+,K+spatial correlation of all is very weak.To show that these ion space distributionentirely free of natural factors influence,by random factors,such ascultivation,irrigation conditions of the decision.For soil moisture content,0～20cmand20to60cm of surface soil spatial correlation is very weak.The layer of soil watercontent of the spatial distribution of random factors is the result of the role and in60～100cm correlation between the layers of medium.Deep soil moisture content ofthe soil that is mainly by the system factors.Pod index and soil characteristics of ceratocarpus growth the relevant analysisshows,soil pH value of ceratocarpus pod plant height,leaf length,fruit appendageslong,long and crown breadth of champions league have inhibition,among the podplant height of ceratocarpus inhibition is most obvious.And with the increase of soildepth,this inhibition continuously strengthen.Leaf width,fruit,fruit width long mainroot length four index and soil pH value is related to the present.Shows some degreeof soil pH value on the leaf,fruit of ceratocarpus pod,the growth of root system hasstimulative effect.Investigate its reason,is of ceratocarpus pod of soil environmentaladaptation of the long-term results.For salt ion speaking,CI^-,SO₄²-,Ca²+,Mg²+four ionand the growth of ceratocarpus pod closely related.The four ion concentration or content change can be cause of ceratocarpus pod growth character bigger change.Andoverall,to pod surface soil of ceratocarpus great influence.The soil with pod is annualshort-life plants on the length of the root.As for the soil water content,in the podgrowth index of soil,and the soil water content positive correlation exists between theleaf width is main root length.And the main root length of surface soil water contentwith only the highest correlation.Soil moisture content is still the growth ofceratocarpus pod limiting factors.