期刊论文

中文

现代农业科技

1007-5739

2011

3

27-29+31

10.3969/j.issn.1007-5739.2011.03.006

国家863项目（863-306-ZD05-3-E）； 国家自然科学基金资助项目（39670142）；

本校为第一机构

通过田间试验,对稻鸭鱼共栖生态系统中蜘蛛的数量变化进行了详细的记录,并运用Logistic方程,建立了相应生态系统中蜘蛛增长的数学模型.经数据分析,结果表明:稻鸭鱼共栖生态系统中蜘蛛总量参数为:环境容纳量K=893.8137,自然增长率r=0.1373,蜘蛛总教量方程为:Nt=893.81367/1+e3.6331-0.1373t稻鱼共栖生态系统中蜘蛛总量参数为:环境容纳量K＝936.3712,自然增长率r＝1532,方程为:Nt＝936.3712/1+e3.9799-α1532t;稻鱼共栖生态系统中蛛总量参数为:环境总纳量K＝936.3712,自然增长率r＝0.1532,方程为:Nt＝936.3712/1+e3.9799-α1532t;而常规用药的稻田中蜘蛛由于受药物作用的影响,环境容纳量K值不稳定...

Through farm trial,the quantity of spiders in rice-duck-fish commensalisms ecosystem was recorded detailedly and logistic equation was exerted to establish maths model of spider′s increasing in the connected ecosystem.By analyzing these data,the calculated results showed that the parameter of spiders′ total amount in rice-duck-fish commensalisms ecosystem was environment acceptance K was 893.813 7,ratio of natural increase r=0.137 3,equation of spider′s total amount was Nt=893.8137/1＋e3.6331-0.1373t;the parameter of spiders′ total amount i...