Study On Different Mield Management Measure To Tall Fescue Extended Influence

The extension of lawn effers to the lawn grass as a result of to have is divided the tiller and the reproductive properties which ground and (or) the underground rhizome produces, is constructing plants the aspect to display for has the strong surface to cover and to invade ability and underground solid earth ability, it is the lawn grass distinguishes one of between other non-lawn plant principal characteristics, also is the lawn grass drought-resistant, resists the cold, bears infertile, bears trim level ground and so on tramples, bears to use the characteristic synthesis performance. Applies fertilizer, irrigates, spurts executes PP333 is the lawn grass maintenance management main cultivation measure, has to the lawn grass expansion affects greatly. This article studied under the big field and the bonsai condition has applied fertilizer, irrigates, spurts executes PP333 to the tall fescue single extension and the root system characteristic influence, obtained the following main conclusion:1. Through three factor three horizontal field orthogonal experiment, has studied different N, P, the K combination to the tall fescue extended influence, finally indicated:N is affects the tall fescue ground expansion the primary factor, N used is much, the adult plant is higher, the ground plant quantity is bigger; Divides the tiller and the cover area the tendency which assumes after the N used much increase increases first reduces, 10g/m² the N tall fescue minute tiller number are most, the cover area is biggest. Three fertilizers to the high influence size order for N > K > P, halve the tiller, the cover area and the ground plant quantity influence size order for N > P > K.P is affects the tall fescue underground expansion the primary factor, P used is big, the root system is deeper, the underground plant quantity, the root system surface area and the root system volume are bigger; The root system expansion scope assumes the tendency after the P used increase which increases first reduces, 10g/m² the P tall fescue root system expansion scope is biggest.The extended appraisal result indicated that, processing combines N10P15K4, namely 10g/m² N, the 15g/m² phosphate fertilizer (the P₂O₅ amount used), the 4g/m² potassium fertilizer (the K₂O amount used) is promotes the tall fescue ground expansion to apply fertilizer best the combination; Processing combines N5P15K12, namely 5g/m² N fat, the 15g/m² phosphate fertilizer, the 12g/m² potassium fertilizer are promote the tall fescue underground expansion to apply fertilizer best the combination; To ground and the underground synthesis extension best processing combination also is N₁₀P₁₅K₄.2. Studied under the basin-cultured conditions, in the 100-1900mg/L density scope, PP333 can suppress the tall fescue adult plant effectively the growth speed, the ground branches and leaves level expands, the ground plant quantity accumulation and the root system elongation, enhances the root system the surface area, the volume and the root cap compared to, promotes to divide the tiller and the underground plant quantity accumulation, the density is higher, the regulative effect is more obvious. When the density is bigger than 700mg/L, to the adult plant growth speed and ground plant quantity influence becoming slower, when the density is bigger than 1000mg/L, halves influence becoming slower which the tiller, the ground maximum expansion distance, the root system grow. When the density is bigger than 1300mg/L, to covers the area influence becoming slower. When density 1300mg/L, the underground plant quantity, the root system surface area and the volume are biggest, root cap compared to highest.The extended appraisal result indicated that, spurts executes PP333 has the inhibitory action to the tall fescue ground extension, also along with the PP333 density increase, the inhibitory action is more obvious. But the low concentration PP333 has the promoter action to the tall fescue underground root system's expansion, also presents along with the density increases promotes the successive inhibition change tendency, in which to think first the 1000mg/L density processes to the tall fescue underground expansion promotion effect is best, next is 700mg/L and 1300mg/L density processing.3. Studied under the basin-cultured conditions,in 100%W-80%W, 80%W-60%W, 60%W-40%W, the 40%W- moisture content lower limit (wilting) under four kind of moisture content processing, irrigates the quantity to be bigger, the evapotranspiration quantity is bigger, the tall fescue growth speed is quicker, is divided the tiller number to be more, the maximum expansion distance, the cover area, underground and the ground plant quantity is bigger, the root system is longer; The root system volume and the root system surface area after irrigate the tendency which the quantity the increase assumes increases first reduces, 80%W-60%W irrigate the processing root system surface area and the root system volume are biggest, respectively is 375.44 cm²,4.69 cm³.The extended appraisal result indicated that, 100W%-80%W irrigates processes is most advantageous to the tall fescue ground expansion, 80%W-60%W irrigates processes underground and expands comprehensive to the tall fescue advantageously...