Response Mechanism Of Stotoniferous And Rhizomatous Plants To Trampling Stress And Soil Compactness

The change of soil compactness influenced not only the soil physical character but alsoroot’s penetrate resistance, soil water content, soil air permeability and water fertilizerutilization etc. Trampling first reflected in the change of soil compactness. With the increaseof the trampling intensity and the duration of trampling, the soil compaction of flat bed wasincreased, trampling treatment changed the roots distribution of turfgrass. With the increase ofthe trampling intensity, the proportion of surface layer (0～5cm) of plant root systemenhanced. Activity of roots reduced, lead to the accumulation of nutrient sand absorptioncapacity reduction. Therefore in this paper, under the premise of a combination of a largenumber of predecessors’ research results. White clover (Trifolium repens L.)、Leymuschinensis, as common wander stem plants in the North, are selected as the research object.Respectively different soil compaction and trampling treatment. By observing the two plantgrowth conditions and determination of their growth, physiological indicators, analyzing theresponse mechanisms of wander stem plants on different soil compaction and tramplingintensity.Provide a scientific basis for the establishment of reasonable grazing managementdecisions as well as lawn.（1）The soil compactness had a significant effect on the soil bulk density and porosity.Soil bulk density with increasing firmness increases; soil capillary porosity with increasingfirmness decreases. White clover lawn with the increase of trampling intensity, soilcompaction and density showed significant increasing trend, soil capillary porosity opposite.（2）Compacted soil could restrain the growth of L. chinensis. When soil compactnessincreased, rapid loss of soil moisture. Soil compaction affected the available nutrient contentsduring L. chinensis growth, and it also decreased the uptake of nutrients. Each componentdensity and biomass of L. chinensis was the largest in the slightly compacted soil (S2), whilethose parameters are the lowest in the most compacted soil (S5). （3）The soil compactness had a significant effect on the rhizome diameter andbranching angle. Soil compaction through the large, slow roots extend, reduce the length andincrease in diameter; surface soil compaction increased, resulting in an increase in soil bulkdensity, soil capillary porosity is reduced, leading to soil drought, L. chinensis rhizomebranching angle increases great way to escape and explore more suitable environment tosustain its growth and survival.（4）Soil compaction influence the content of each component of L. chinensis proline.Proline is widely distributed in plant as protection material. When soil compactness increased,the content of each component of L. chinensis proline increased.（5）The growth parameters of the white clover obviously under different tramplingtreatment. As the trample time prolonged, the shoot height(T14), turfgrass height(petiole),leafarea, density, above ground biomass and under-ground biomass were lower than those underCK and light stress(T2)(P<0.05). While between T6and T2, increased their stolon diameterand branching capacities, which presented a typical ecologically adaptive strategy.（6）Trampling disturbance have remarkable impact on physiological parameters ofwhite clover. With the increase of trampling intensity, soil moisture content is reduced,resulting in white clover plants membrane system damage, water stress increases, resulting ina large accumulation of proline.