Control Effect And Mechanism Research Of Mowing Spartina Alterniflora

Spartina alterniflora has played the important roles in protecting the beach shore , accelerating silt deposition as well as purificating the coastal water quality since was introduced to our country in 1979. But the high resistance and the high adaptability, the developed roots and the greatly strong sprouts ability, in addition we had not discovered the local natural enemy and other restriction factors might effective control Spartina alterniflora growth and proliferation in our country. So the spread speed of Spartina alterniflora has greatly surpass the man control ability, result in the local species are pushed aside, which destroyed the survival environment of bottom biological and birds, and brought many negative influences to the natural environment and the economical development. Weighed the advantages and disadvantages, control the Spartina alterniflora's crazy expansion already was the ultimate trend.This paper summarized the biology characteristic of Spartina alterniflora, the positive and negative influences to the environment after introduced Spartina alterniflora, as well as current domestic and foreign control measures to Spartina alterniflora, through the dynamic survey height ,amounts, biomass after different timing mowing. The results show that the height, amounts, aboveground biomass of Spartina alterniflora which regrows after mowing on July 21 (boot stage-heading) all under the control,and achieve significant or very significant differences. So this period should be the best mowing time which the active control the Spartina alterniflora expands; and unifies the changes of root vigor, soluble sugar contents, free amino acid contents and protects enzyme activity of defense system after different timing mowing, discovered the nutrient transfer rule in Spartina alterniflora, further certificate that the best mowing times to active control Spartina alterniflora are the booting stage and the heading stage.