Research On The Suitable Sand/soil Ratio Of Football Field Turf In The Semi-arid Area In Northwest China

As the largest sport,football enjoys the love and participation of hundreds of millions of fans around the world.As the playing field of the football pitch,the quality of the football not only affects the safety and comfort of the athletes,but also affects the competitive level.The play.Due to the vast territory,complex climatic conditions and diverse soil types in China,most of the football stadium construction models basically follow foreign standards,failing to combine local conditions and setting the bed structure and selecting the sand/soil ratio of the root layer.The construction of the site has certain limitations.In the semi-arid regions of northwest China,the climate is dry and cold,rainfall is low,soil fertility is low,and salinization is severe.Therefore,this experiment focuses on the special climate and soil conditions in the region.In the Lanzhou region,river sand,farmland soil are selected as the matrix of the rhizosphere.In order to study the soil physical properties and microbiology of lawn beds in football fields,we used six different sand/soil ratios for grassland bluegrass and perennial ryegrass,which are widely used for turfgrass establishment in northern football fields.The quantity and enzyme activity,turf quality,and the ability to retain water and fertility during wintering are used to screen out the sand/soil ratio suitable for the grass root bed layer of football pitches in the semi-arid area of the northwest in order to establish and manage the turf on the football field.Provide theoretical guidance and practical basis.The main findings are as follows:1.With the increase of sediment concentration in the rhizosphere of the bed,soil water content,field water holding capacity and organic matter content gradually decreased,soil compaction and total porosity decreased,and soil bulk density and saturated hydraulic conductivity increased significantly(P<0.05);soil water content,soil bulk density and total porosity increase with the increase of soil depth,but the saturated hydraulic conductivity and organic matter content showed a decreasing trend.2.With the increase of sediment concentration and soil depth in the rhizosphere of the flat bed,both the amount of soil microorganisms and the activity of the enzyme showed declines in different degrees.When the sediment concentration is less than 60%,the decline trend of bacteria,fungi and actinomycetes is not obvious;when the sediment concentration is greater than 60%,the number of bacteria and actinomycetes decreased significantly(P<0.05);soil urease,sucrase,alkaline phosphate The activities of enzymes and catalase decreased significantly with the increase of sediment concentration in the rhizosphere(P<0.05),and the activity of urease,sucrase,alkaline phosphatase and catalase in 0-5cm surface soil was better than 10-15 cm soil.3.With the increase of sediment concentration in the rhizosphere of the ping bed,the turf density and above-ground biomass showed a gradual downward trend;the duration of turfgrass formation was prolonged and the underground biomass was increased;the texture was excellent after the first,and the color was deeper,then shallower,and uniform.And the turf rebound rate,rolling distance,and turf intensity increase first and then decrease.A comprehensive evaluation of the turf quality in the year of establishment and the second year of greening by the subordinate function method shows that the S60 and S40 treatments performed well,ie 60% sand + 40% farmland soil and 40% sand + 60% farmland soil,in the rhizosphere The layering ratio is suitable for the local climatic conditions and the level of maintenance and management,and is suitable for promotion and application in the construction of the football field in the area.4.With the increase of sediment concentration in the rhizosphere of the bed,the water holding capacity and fertility retention capacity of the soil in the bed is gradually reduced.When the sediment concentration is greater than 60%,the soil moisture content and soil N,P,K,and N The fast-acting P and quick-acting K contents showed a significant downward trend.With the prolongation of the lawn wintering time,the soil N,P and K contents first decreased and then increased.When the sediment concentration in the rhizosphere was more than 80%,the soil was P,K,N,and P.The K content of the quick-impact K decreased significantly,and the water-retaining and nutrient-holding capacity was poor.Therefore,it is not suitable for preparing the rhizosphere layer of the lawn bed in the sports ground.