Spatial Characteristics Of Soil Properties In Changli Gold Coast National Nature Reserve

Changli Gold Coast National Nature Reserve was selected as the study area,and the spatial distribution pattern of six soil nutrients,namely,p H,total salinity,organic matter,effective phosphorus,fast-acting potassium and alkaline nitrogen,was investigated by combining classical statistics and geostatistics,and the selection of suitable tree species was suggested,with a view to providing a theoretical basis for The main results are as follows The main research results are as follows.（1）A total of 28 plant species were recorded,belonging to 12 families and 25genera.The most frequent herb was（Artemisia argyi）,followed by（Setaria viridis）and（Phragmites australis）;the most frequent tree species was（Robinia pseudoacacia）;the most frequent shrub was（Amorpha fruticosa）.The most frequent species among trees is Robinia pseudoacia;among shrubs,Amorpha fruticosa is the most frequent;herbaceous plants are vigorous and most of them are in good condition;trees are growing well and can adapt to their living environment;shrubs are growing in average condition.（2）The soil texture of the reserve is mainly sandy soil,and the distribution of soil capacity is in the range of 1-5(<1g/cm^-3to>1.55g/cm^-3);the distribution of soil water content is in the range of 1-5（<5%to>20%）;the distribution of soil total salt is in the range of 1-5(<1 to>6g/kg^-1);the distribution of soil organic matter is in the range of 2-6（<6 to 40g/kg）.The distribution of soil effective phosphorus is at level 1to 6（<3 to>40mg/kg）;the distribution of soil alkaline nitrogen is at level 5 to 6（<30to 60mg/kg）;the distribution of soil fast-acting potassium is at level 1 to 5（<30to>200mg/kg）;and the overall soil p H is at level 4,alkaline.（3）There are obvious correlations between the physical and chemical properties of each soil in the protected area.Among them,soil weight is significantly negatively correlated with soil water content,and highly significantly negatively correlated with organic matter,alkaline nitrogen,effective phosphorus and fast-acting potassium;water content is significantly positively correlated with alkaline nitrogen,and highly significantly positively correlated with other nutrient indicators;total salinity is highly significantly positively correlated with p H;organic matter is significantly correlated with water content,and highly significantly correlated with all other indicators,except for the correlation with soil p H,which is not significant,and correlated with alkaline nitrogen The correlation with alkaline nitrogen was the most significant（correlation coefficient 0.671）;there was also a significant positive correlation between alkaline nitrogen,effective phosphorus and fast-acting potassium.（4）Through the soil physical and chemical properties classification and spatial distribution map,we can understand the distribution of soil physical and chemical properties and soil nutrient abundance and deficiency in the protected area,and on this basis,we suggest that the protected area should choose cold-resistant,drought-resistant,saline-alkali-resistant and sand-resistant tree species for planting.