Study On Relationship Between Habitat Soil Physical And Chemical Properties And Accumulation And Distribution Of Nutrient Elements In Several Wild Flowers Of Shergyla Mountain In Xizang(Tibet)

The wild flowers is rich in resources and its potential of development and utilization is tremendous in Xizang(Tibet).This subject select Shergyla Mountain which is the most representative region for study.Using sampling investigation and test methods,and colligating variance analysis,cluster analysis,and related analysis,it systematically researches the soil physical and chemical characteristics of wild flower provenances habitats and the plants own elements enrichment characteristics in the region.It proved the relationship between nutrition elements absorption of wild flowers plant and the soil nutrient content in different habitat,then grasped the requirement rule about wild flowers for soil nutrient in growing process.It must provide theoretical basis and key technical support for introduction, domestication, conservation and utilization of wild flowers plant in Xizang(Tibet),and has important scientific value and social significance.The study shows that:(1)The soil moisture conditions is better in east slope than western slope,the average pH value is 6.16 and shows slightly acidic,and the fertility level of organic matter is higher.The supply of soil medium and large volume elements is high, hydrolytic nitrogen, total potassium, available potassium content exists significant difference in different geographical position.The supply level of soil trace elements is lower, and only sodium and available boron content have significant difference among various points.Through clustering analysis for the soil main physical and chemical characteristics,11 samples can be divided intoâ‘ 7,10,3,8;â‘¡6,11,4;â‘¢2,5,1;â‘£9 sample point.(2) There only crude ash is significantly different in nutrients of different flowers plant communities.In the large volume elements of plants,total phosphorus, total potassium and calcium have significant difference,and iron, sodium, copper element content are significantly different in trace elements.The magnesium and chromium content of Primula species have significant difference. The magnesium, zinc, copper and sodium contents of Rhododendron species exist significant difference. After clustering analysis the enrichment status of mineral nutrition in plant can be divided intoâ‘ 3,6,10,11;â‘¡1,5,7,4;â‘¢8,9;â‘£2 sample point. (3) Soil organic matter is significantly andpositively correlated with total nitrogen, hydrolytic nitrogen, iron, pH value and available boron. In soil mineral elements, total nitrogen with hydrolytic nitrogen, iron, available boron,and calcium with copper, magnesium with zinc, iron with available phosphorus all have a positive correlation, iron also with total phosphorus, available potassium and available boron have a obvious negative correlation.The total nitrogen content in plant community with soil calcium, zinc, copper element content, total phosphorus with soil available boron, calcium with soil manganese, copper content with soil calcium, magnesium, sodium, and iron, sodium, zinc content in plant with soil total nitrogen and hydrolytic nitrogen, iron, sodium content also with soil available boron all show a significant positive correlation. In addition, sodium content with soil available potassium,and magnesium content of plant community with soil calcium, copper content, magnesium content of plant community with soil total potassium have a obvious negative correlation.The correlativity degree between representative plant elements and soil elements is as follows: Primula > Pedicularis> Rhododendron.Furthermore,the crude fiber has a clear negative correlation with crude ash and nitrogen free extract in nutrients of plant community.