枯草层和覆土深度对冷蒿种苗建植的影响  

Effects of Litter Layer and Covering Depth on the Seedling Establishment of Atremisia frigida

作　　者：游永亮[1] 刘桂霞[2] 王譞[2] 韩建国[1] 

机构地区：[1]中国农业大学草地研究所,北京100193 [2]河北大学生命科学学院,河北保定071002

出　　处：《安徽农业科学》2009年第16期7443-7445,共3页Journal of Anhui Agricultural Sciences

基　　金：国家"十一五"科技支撑项目"草地生态恢复与草畜平衡关键技术研究"(2006BAD16B01)

摘　　要：[目的]研究枯草层和覆土深度及其互作对冷蒿种子萌发和早期生长的影响。[方法]以枯草和冷蒿种子为试材,设覆土深度4个水平（0、0.5、1.0和2.0 cm）,枯草层重量4个水平（0、50、100和200 g/m2）,按2因素完全随机区组设计开展试验。[结果]覆土深度对冷蒿出苗率的影响显著,随着覆土深度增加,冷蒿出苗率显著降低,覆土1.0 cm的出苗率较不覆土的降低5倍多,覆土2.0 cm时出苗率为0 枯草层对出苗影响不显著,但对生长表现（株高和生物量）影响显著。少量枯草层（50~100 g/m2）有利于植株生长,而当枯草层达200 g/m2时,枯草层的物理阻碍作用显著,冷蒿的生长表现都显著低于其他处理。[结论]枯草层和覆土深度均显著影响冷蒿种苗建植,两者互作也显著影响冷蒿出苗率。[Objeetive] The study aimed to research the effect of litter layer, covering depth and their interaction on germination and early growing of Atremisia frigidu. [ Method] With the litter layer and A.frigida seeds as the tested materials, the 4 levels of covering depth （0, 0.5, 1.0 and 2.0 cm） and 4 weight levels of litter layer （0, 50, 100 and 200 g/m2）were set up to make the test according to randomized block design with two factors. [ Result] The effect of covering depth on A.frigida emergence rate was remarkable. With the increase of covering depth, the 4.frigida emergence rate was decreased. The emergence rate of covering depth of 1.0 cm was 5 times lower than that without covering. The emergence rate reduced to 0 when the covering depth raised to 2.0 cm. The litter had no significant influence on emergence, but it affected the growth including height and above-ground biomass noticeably. Small amount of weed litter layer （50 - 100 g/m2 ） was good [or growth of A. frigida, while once the ＇titter reached to 200 g/m2 ,the physical barrier effect would get obvious and the growth of A. frigida was greatly more worse than other treatments. [ Conclusion ] The litter layer and covering depth could all effect obviously A.frigida seedling establishment and the A.frigida emergence rate was effected by their interaction.

关 键 词：冷蒿 覆土深度 枯草层 种苗建植 

分 类 号：S812[农业科学—草业科学]