The establishment of spatial model of annual weed Alopecurus Myosuroides seed dispersal and simulation of its population dispersal
Spatial model of annual weed seed dispersal, in this article, was theoretically derived and the spatial models of seed dispersal of the weed species, Alopecurus myosuroides were built based on the experimental data, which may be divided into three types according to the coefficient β＜0, β=0, β＞0. The results showed that dispersal of annual weed seed in any direction obeyed an approximate Gaussian distribution; under the experimental conditions, spatial distribution type of weed seed dispersal changed with variation of wind velocity. The result of model analysis indicated that the distribution type described by Howards model was similar to that of seed dispersal of the weed species under the condition of about 1.95m/s, i.e. the model of seed dispersal when β=0. Using simulation analysis we found that mean control agent for the species should have a decrease with an increase of wind velocity to prevent weed with the initial configuration from spreading, which implicated less herbicide needs spraying in every cell with weed on average when wind velocity increases.
Probabilistic distribution Weed population Dispersal model Alopecurus myosuroides
Jihuai Wang Svend Christensen Preben K. Hansen Jianwen Wang
Guizhou Academy of Science, East Yanan Road 40, Guiyang 550001, China ;Agriculture College, Guangdon University of Southern, Niels Bolus Allel, 5230 Odense M, Denmark Department of Crop Protection Research Center, Flakkebjerg, DK-4200 Slagelse, Denmark Guizhou Academy of Science, East Yanan Road 40, Guiyang 550001, China
国际会议
山东泰安
英文
269-272
2008-07-25（万方平台首次上网日期，不代表论文的发表时间）