摘要
鉴于桉树主要栽植区林地有效磷匮乏且分布空间高度异质性,造成了桉树人工林可持续发展严重受阻的现状,本文在构建不同供磷方式的室内盆栽环境的基础上,选择我国南方主要栽培的8个桉树品种为研究对象,通过测定分析不同桉树在不同的磷环境下其叶片和根系酸性磷酸酶活性的差异性规律,为筛选高效利用品种桉树提供依据,以缓解林地磷素匮乏造成桉树人工林生产力下降的困境。结果表明:巨桉9叶片在低磷环境下具有较高的酸性磷酸酶活性,而尾巨桉3216在磷充足的条件下能够充分的吸收外界的磷素,提高自身的酸性磷酸酶活性;桉树根系酸性磷酸酶的活性大小为:邓恩桉在低磷环境下能够提高酸性磷酸酶活性,而在磷充足的条件下,尾巨桉3216能够充分的吸收外界的磷素,提高自身的酸性磷酸酶活性。
Due to the effective-phosphorus shortage of Eucalyptus robusta planting area and distribution of land space high heterogeneity, the sustainable development of artificial Eucalyptus robusta is baffled. Base on indoor plants envi- ronment, different ways of applying phosphorus are adopted. And eight main cultivation Eucalyptus robusta variety of south China are developed as the research object. The law of different phosphatase activity of leaf blade and root sys- tem in different Eucalyptus robusta variety with variational phosphorus environment is analyzed. According to the law, high effective utilization Eucalyptus robusta variety can be developed. Meanwhile the trouble of decreasing in Euca- lyptus robusta planting productivity is solved to some content. The conclusion shows： leaf blade of E. geandis 9 has high acid phosphatase activity in low degress of phosphorus, while E. urophylla×E, grandis DH-32-16 can fully absorb outside phosphorus in sufficient phosphorus conditon to improve itself acid phosphatase activity. The point of acid phosphatase activity of Eucalyptus robusta root system can be concluded： acid phosphatase activity of E. dunnii can be improved in low degress of phosphorus, and E. urophylla×E, grandis DH-32-16 can fully absorb outside phosphorus in sufficient phosphorus conditon to improve itself acid phosphatase activity .
出处
《福建林业》
2014年第5期27-30,共4页
Fujian Forestry
关键词
桉树
异质性供磷
酸性磷酸酶
根系
Eucalyptus spp.
Heterogeneity for the phosphorus
Acid phosphatase
Root sytemr
