Effects Of Pruning On Evapotranspiration And Nutrient Distribution Of Kentucky Bluegrass

Lawn and human social civilization complement each other and become an organic whole of social civilization.Mowing,irrigation and fertilization are three important maintenance measures in lawn management,which determine the maintenance cost.In recent years,low consumption maintenance has been recognized by the lawn community.In this paper,the grass grass was taken as the research object,and the evapotranspiration and nutrient distribution of the grass at different mowing heights were analyzed by using a variety of mathematical statistical methods,so as to provide a basic basis for the reasonable mowing and maintenance of the grass,and then provide theoretical support for the establishment of the accurate water-saving irrigation system.The results show that:(1)through the typical correlation and principal component regression analysis,it is shown that litter has the greatest influence on lawn evapotranspiration and is negatively correlated,followed by aboveground biomass and water content of 0-15cm deep soil,which is positively correlated.(2)mowing had an effect on the evapotranspiration of the lawn.With the decrease of the mowing height,the evapotranspiration of the lawn water also decreased.The evapotranspiration of the lawn with the mowing height of 3cm was significantly lower than that of other treatments with the mowing height higher than 3cm,and the evapotranspiration of the lawn with the mowing height of 12cm was significantly higher than that of other treatments with the mowing height lower than 12cm.(3)mowing stress had a significant impact on the distribution pattern of nutrient elements in each organ of lawn grass.The proportion of nutrient elements in the roots and stems of all mowed lawns was greater than that of the control,but the proportion in leaves was smaller than that of the control.The N/P of mowed lawns were all greater than 16,indicating that the growth of lawn grass was mainly restricted by P.(4)mowing stress had a significant effect on nutrient content in different layers of turf soil.Compared with the effect of pruning stress on nutrient content and measurement ratio of soil depth of 0?10cm and 20?30cm,the effect of pruning stress on soil depth of 10?20cm was more significant...