中文摘要：

针对连续多年覆盖后雷竹林产生的衰退减产问题,从竹林覆盖物料对竹子的化感作用角度对衰退的原因进行了分析。利用外施不同浓度和种类的酚酸以及稻草、竹叶水浸液对毛竹种子进行发芽实验,以探求酚酸等化感物质对竹子生长的影响。试验结果表明,随处理液浓度的上升,几种酚酸和稻草、竹叶水浸液对毛竹种子的抑制作用增强。稻草、竹叶2种覆盖物1倍浸提母液处理后长出的种子胚根迅速失活死亡,5、10倍2种浸提母液对发芽势、胚根长度、胚根质量有促进作用。100 mg.L^-1酚酸或混合酚酸液使胚根长度与对照相比减少24.49%-48.99%,胚根质量减少9.17%-38.08%;500 mg.L^-1酚酸或混合酚酸液可使胚根长度减少73.48%-88.63%,胚根质量减少76.00%-90.83%。据此认为,覆盖物产生并在土壤中累积的大量酚酸可抑制竹林根系生长,并导致雷竹林经连续多年覆盖后衰退和减产。

英文摘要：

After continual covering for several years, the yield and quality of Phyllostachys praecox will decline seriously. Aimedat at this problem, we detected the effects from allelo-chemicals of the materials which are used for covering. The solution of several phenolic acids, including p-hydroxy benzoic acid, vanillic acid, p-coumaric acid, ferulic acid and their mixture, and distilled solution of different concentrations from rice straw and bamboo leaves were used on germination of Phyllostachys heterocycla seeds. Mother distilled solution made radical dead in a short time, but both 5 and 10 times of mother solution promoted length and weight of radical;100 mg · L^-1 is the lowest concentration of phenolic acids solution and their mixture, the length of radical which treated by them was 24.49%-48.99% less than the control, 9.17%-38.08% was the weight; compare with 100 mg · L^-1, the length and the weight of radical which treated by 500 mg · L^- 1 were 73.48% - 88.63% and 76.00% - 90.83% less than the control , respectively.