Using the leaves of test‐tube seedlings of Actinidia chinensis cv .Hongyang as explants ,the effect of different grow th regulating substances on the initiating of callus ,the regeneration and rooting of adventitious buds was researched .The results indicated that the medium of MS supplemented with 0.5 mg/L zeatin and 0.5 mg/L 2 ,4‐dichlorophenoxyacetic acid (2 ,4‐D) induced the faint yellow and loose callus . The medium of MS supplemented with 3.0 mg/L 6‐benzylaminopurine (6‐BA ) and 1.0 mg/L naphthaleneacetic acid(NAA) induced the green and compact callus .Both of the induction efficiency achieved 100% .The maximum regeneration frequency of adventitious buds was 100% when MS was supplemented with 5.0 mg/L 6‐BA and 0.5 mg/L NAA .The best medium for rooting of the adventitious buds was 1/2 MS medium with 1.2 mg/L IBA ,and the rooting rate was 83.3% .

Phosphorus forms of different weathering degree rocks of yinkeng,longtan,dengying,gufeng and shuangshan six group of Chaohu Lake basin were investigated by using the method of phosphorus sequential extraction.The total phosphorus was gradually reduced in the weathering process,Ex-P、Al-P、De-P、Ca-P and Oc-P were decreasing and Fe-P and Or-P were increasing in mostly groups and Oc-p was the main form in the most of the rock.The pH value was the most important influence factor of phosphorus forms compared with phosphorus forms distribution,content and the pH value in the six group samples.Weathering was one of the important factors of eutrophication of Chaohu Lake basin.