| This experiment mainly focuses on the research of Kentucky bluegrass,accroding to the geographical environment and climate of the Harbin district,hoping to make use of ability of super absorbent polymer to prolong life of grass in Harbin,improving the counter-drought ability,and delaying watering season.While maintaining the outward appearance and quality of grass,we seek to reduce water usage on grass without affecting the effect of its normal Physical activities To observe how super absorbent polymer affect the sprout of Kentucky bluegrass in growth stage and mature grass in water restriction stage.Results are as follows:(1) Sprout growth stage:STOCKSORB can increase the sprouting rate of Kentucky bluegrass and makes growth faster,while科瀚98 decreased the sprouting rate of Seedlings and negatively affects grass height;In nursery,STOCKSORB increases the cover of Kentucky bluegrass and shorten the time of the cover of grass in growth stage to 80%,while科瀚98 has no remarkable effect on cover of Kentucky bluegrass and the time of the cover of grass in growth stage to 80%;In sprout growth stage,the evaporation rate is carried out in nursery supplied with enough water,with the increase of the concentration of super absorbent polymer, the evaporation rate of Kentucky bluegrass decreases;About the ourward appearance and quality,as Concentration of super absorbent polymer increases,color score increases as a whole.density,homogeneity,green stage score also increase.The differences between teams that using different super absorbent polymer are not large,while the differences between the teams using super absorbent polymer and the contrasting team are quite notable.There is no notable effect on Tillow number.(2) Water restriction stage:The contrasting team has got the fastest evaporation rate.The evaporation rate of the teams using super absorbent polymer increases as a whole with the increase of concentration;The decreasing speed of the water content of soil of the contrasting team is quicker than the teams using super absorbent polymer;super absorbent polymer can slower the damage that water restrction do to the outward appearance and quality of Kentucky bluegrass,but with different concentration,there are differences in degree.The compositive marks of the teams using super absorbent polymer are all higher than the contrasting team, however,it is not the case that the bigger the concentration of the super absorbent polymer is, the higher the mark is,and it has a more remarkable effect on mature grass compared with the sprout.The ratio of roots and leaves in super absorbent polymer administered group is bigger in the control group.As the restriction gets deeper,cytoplasma membrane relative permeability, pyrrolidinecarboxylic acid content viaration has a rising tendency with the deepening of stressing degree while the control group has the highest rising volocity.Leaf relative moisture capacity and chlorophyl content viaration has a decreasing tendency with the deepening stressing degree,besides the growth capacity of control group is the most.With the dosage of super absorbent polymer increasing,each Kentucky bluegrass index of growth and physiology steps up visibly,but significance of difference of different dosage demonstrate distinct in each index.(3) It is feasible to use super absorbent polymer as soon as the planting of the grass,but when administering the super absorbent polymer,certain edaphic and moisture condition is needed,and it should be noticed that the dosage varies while using defferent super absorbent polymer.According to the general appearance,the 50g/m~2 density type of STOCKSORB super absorbent polymer has a better effect while the 25g/m~2 density type of科瀚98 has a better effect.comparing with each other,the STOCKSORB is a little better than the科瀚98,Using super absorbent polymer really can restrain the evaporation rate of the grass,meanwhile reaching the purpose of water saving.For different super absorbent polymer.
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