摘要
[目的]为空心莲子草入侵的预防控制提供理论依据。[方法]通过控制试验,研究了空心莲子草宿根不同片断化程度以及不同土壤埋藏深度对宿根萌芽及幼苗生长的影响。[结果]宿根片断化程度越高,空心莲子草产生越多的萌芽来建立种群,而在宿根片断化程度低的情况下,则通过幼苗早期快速生长来建立种群。土壤埋藏深度对宿根萌芽具有显著影响,但是只要宿根能萌芽出土,并经过充分的生长期,土壤埋藏深度对宿根萌发苗的生长并没有显著影响。[结论]在宿根片断化下,通过萌芽和幼苗生长的权衡策略,有利于空心莲子草的入侵;在防除空心莲子草方面,控制其宿根萌芽出土是关键,覆土深埋可以控制空心莲子草的萌芽。
[Objective]The aim was to provide theoretical basis for the prevention and control of the invasion of Alternanthera philoxeroides.[Method]Effects of fragmentation intensity of fresh roots and their burial depth on sprouting and early growth of Alternanthera philoxeroides were studied by control test.[Result]More sprouts of Alternanthera philoxeroides emerged when the fragmentation intensity of fresh roots was higher,while if the fragmentation intensity of fresh roots was lower,the early growth of Alternanthera philoxeroides shoots was more rapid.The soil buried depth had significant effect on fresh root sprouts＇ emergence,but once fresh root sprouts could reach soil surface and were given enough growth time,even if the fresh roots were buried in different depths,soil buried depth had no significant effect on its shoot growth.[Conclusion]If different fragmentation intensities of roots present,there is a kind of trade-off strategy between root sprouts＇ emergence and shoots＇ early growth,by which Alternanthera philoxeroides can invade new habitat successfully.To control the invasion of Alternanthera philoxeroides,it is critical to prevent its fresh root sprouts from emerging to soil surface,that is,to bury the fresh roots at a further soil depth.
出处
《安徽农业科学》
CAS
北大核心
2010年第32期18190-18192,共3页
Journal of Anhui Agricultural Sciences
基金
湖北省教育厅资助项目(Z200512002)
长江大学优秀中青年科技创新团队资助计划项目
关键词
空心莲子草
宿根片段
埋藏深度
萌芽
幼苗生长
Alternanthera philoxeroides
Fresh root fragment
Soil buried depth
Sprout
Early growth of shoots
