摘要
试验对6 a树龄桉树人工林12个牧草间作3 a后间作系统根层结构进行研究,结果表明:间作牧草3 a后桉树根系主要分布在距树基50～100 cm的行间,间作禾本科牧草限制了桉树根系向行间(4 m)伸展,而间作豆科牧草促进了桉树根系向行间伸展。桉树根系主要集中在10～50 cm的土层,占总根量的74.81%,间作禾本科牧草抑制了桉树根系向浅层分布的可能,而间作豆科牧草后桉树根系向土壤中上层扩展,且更加集中在20～40 cm土层。
The root system structure of silvopastoral intercropping with 12 varieties of forages 3 years later under Eucalyptus plantation, which planted more than 6 years was studied. The results showed that the roots were distributed mostly in the row 50~100 cm away from the Eucalyptus basal horizontly. Intercropping with grasses limited Eucalyptus root to extent to the interval （4 m） of Eucalyptus rows, while that with legumes would promot the Eucalyptus root to extent to the interval. Eucalyptus roots were mainly concentrated in the 10-50 cm depth soil layer in vertical structure, accounting for 74.81% of the total root. So intercropping grasses would suppress Eucalyptus root to extent to the shallow soil layer, whereas legumes would promote Eucalyptus root to expand to the middle soil laver and to be concentrated in the 20~40 cm soil laver.
出处
《热带作物学报》
CSCD
北大核心
2013年第9期1844-1851,共8页
Chinese Journal of Tropical Crops
基金
国家科技支撑计划项目(No.2011BAD17B01-01-5)
农业部物种资源保护“热带牧草种质资源保存”项目
农业部热带作物种质资源保护项目(No.12RZZY-09)
关键词
刚果12号桉
林草间作系统
根系结构
豆科牧草
禾本科牧草
Eucalyptus 12 ABL
Silvopastoral systems
Root system structure
Leguminous grass
Gramineae grass
