作　　者： ; ; ;

机构地区： 河西学院农业与生物技术学院生态研究所

出　　处： 《生态学杂志》 2010年第2期324-328,共5页

摘　　要： 为探讨醉马草(Achnatherum inebrians)种群繁殖和扩散机理,并为其防控和开发利用提供理论基础,研究了不同沙埋深度(0、1、2、3、4和5cm)对醉马草种子萌发和幼苗生长的影响。结果表明:埋深对醉马草幼苗出土率、首次出苗时间、幼苗生长高度以及生物量的分配均有极显著影响(P<0.001);种子萌发和幼苗出土率在2cm沙埋下达到最高(92%),在5cm沙埋下最低(58.7%);幼苗最大高度(10.8cm)出现在3cm的沙埋,最小高度(6.3和7.1cm)出现在0和5cm的埋深;埋深为2cm时,地上和地下生物量最大,埋深5cm时地上和地下生物量均最小;最大根长(约5cm)和最小根长(1cm)分别出现在2～3cm和5cm的埋深。2～3cm的埋深是醉马草种子萌发和幼苗生长的最佳深度。 This paper studied the effects of different sand burial depths （0,1,2,3,4,and 5 cm） of Achnatherum inebrians seed on its germination and seedling growth under a constant temperature regime,aimed to approach the proliferation mechanism of A. inebrians population and to supply theoretical basis for the control and exploitation of A. inebrians. Sand burial depth of A. inebrians seed had significant effects on its seedling emergence percentage,date of first emergence,seedling height,and biomass allocation （P〈0.001）. The seedling emergence rate was the highest （92%） when the seed was buried at the depth of 2 cm,but the lowest （58.7%） when the sand burial depth was 5 cm. The seedling height reached the maximum （10.8 cm） when the sand burial depth was 3 cm,but was the shortest,being 6.3 and 7.1 cm when the seed was buried at the depths of 0 and 5 cm,respectively. The above-and below-ground biomass of A. inebrians was the maximum at the sand burial depth of 2 cm,but the minimum at the sand burial depth of 5 cm; and the root was the longest （nearly 5 cm） at sand burial of 2-3 cm and the shortest （1 cm） at sand burial of 5 cm. It was suggested the optimum sand burial depth of A. inebrians seed for its seedling emergence and growth would be 2-3 cm.

关 键 词： 醉马草 沙埋 种子萌发 幼苗生长

领　　域： [生物学]