Selection and Breeding for Narrow-crown Clone of BlackLocust ( Robin ia pseudoacac ia )
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1.
World Bank Loan Project Office, CAF, Beijing 100091, China
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2.
Puyang Forestry Research Institute of Hepnan Province, Puyang 457000,Hepnan, China
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3.
Huaiyang County Forestry Bureau, Huaiyang 466700, Hepnan, China
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Received Date:
2007-01-05
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Abstract
The paper studied the selection and breeding p rocess for narrow-crown clone of Robinia pseudoacacia cl.‘Zhaiguan’, and its biological & ecological characteristics, techniques for clonalmultip lication and development ofp lanting stocks, as well as the growth performance of clonal stands in different sites. The narrow-crown clone ofblack locustwas selected from black locust population in Huaiyang County of Hepnan Province. The results of clonaltests in various sites showed that the narrow-crown clone had the characteristic of (1) fast growingwith annualmeanheight increment of 1. 5~1. 8 m and annual mean diameter increment of 2. 1~2. 5 cm at the age of 4 to 8 underdifferent cultivation conditions; (2) good stem form with the factor quotient of 0. 7~0. 8; (3) narrow and orbicularcrown with the branching angle less than 35; (4) small or no stipule thorn. The narrow-crown clone of black locustis the excellent p lanting material for the establishment of high-yielding timber p lantations, ecological p rotection forests, agroforestry systems or scenery forests.
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Proportional views
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