放牧干扰对草甸草原羊草植株及根际土壤植物寄生线虫多样性的影响

EFFECTS OF GRAZING DISTURBANCE ON THE DIVERSITIES OF THE MEADOW GRASSLAND Leymus chinensisPLAND AND FOUNDATION SOIL PLAND PARASITIC NEMATIDES

对人畜干扰下的草甸草原羊草根、茎、叶及根际土壤中植物寄生线虫进行了研究,结果表明,草甸草原羊草根、茎、叶及根际土壤中植物寄生线虫种类(属)有:类短体属(Pratylenchoicles)、叉针属(Bolendorus)、野外垫刃属(Ag-lenchus)、螺旋属(Helicotylenchus)、矮化属(Tylenchorhynchus)、头垫刃属(Aphelen)、盘旋属(Bursapbrelenchus)、粒属(Anguina),居民点周围羊草根、茎、叶及根际土壤中的线虫种类(属)及数量高于围栏内羊草;居民点周围羊草根、茎、叶及根际土壤中的稀有种的多样性指数(H')、均匀度指数(J)、丰富度指数(SR)显著低于围栏内,而植物寄生线虫成熟度指数(PPI)显著高于围栏内;植物寄生线虫稀有种多样性指数(H')、均匀度指数(J)、丰富度指数(SR)、植物寄生线虫成熟度指数(PPI)可作为指示受干扰的植物及草地的线虫生态特征指标。

Human interference with the meadow stepps Leymus chinensis（Trin.） Tzvel.of roots,stems,leaves and rhizosphere of plant parasitic nematodes were studied,the results indicate ：grassland plant roots,stems,leaves and rhizosphere plant parasitic nematodes of species（genus） Pratylenchoicles,Bolendorus,Aglenchus,Helicotylenchus,Tylenchorhynchus,Aphelen,Bursapbrelenchus,Anguina,residential areas around the sheep grass roots,stems,leaves and non-rhizosphere soil with the species（nematodes of） and the number is higher than in the fence;Settlements the surrounding of the Leymus chinensis roots,stems,leaves and rhizosphere soil of the H some diversity index,evenness index,richness index significantly lower than the fence inside,and plant parasitic nematodes maturity index（PPI）,significantly higher than that in the fence;Plant parasitic nematodes H some rare species diversity index H,evenness index（J）,richness refers to（SR）,plant parasitic nematodes maturity index（PPI） can be used as plants and grassland ecological feature index of interference.