【摘要】 系统研究了江西大岗山连栽杉木人工林土壤性质变化状况。结果表明 :1、2代杉木人工林土壤物理性质相比 ,不论幼龄林还是中龄林 ,1代林均明显好于 2代林 ;比较土壤酶活性 ,各林分也表现出相似的规律 ,即 1代林土壤酶活性较高 ;而比较两代林土壤化学性质则发现 ,在幼龄林发育阶段各土壤因子指标变化规律不明显 ,土壤有机质、土壤氮素等指标反而为 2代林较高 ;但各林分发育至中龄林阶段后则有了较强的规律性 ,除土壤有效铁和有效铜外 ,其它所有指标均为 2代林较低。更多还原

【Abstract】 The changes of soil properties of the successive Chinese Fir plantation were studied in Dagang mountain of Jiangxi Province. The result shows that the soil physical properties of young and middle aged Chinese Fir plantations of the 1st generation are better than that of the 2nd generation. Compared the activities of soil enzymes between two generations, the same result, i.e. soil enzyme activities of all the 1st generations are much higher than that of the 2nd generations is showed. Comparing their chemical properties, the result seems irregular during young aged period. Some important soil chemical properties, such as soil humus and soil N, are much higher in the 2nd generations and become regular in the middle aged period. That is, the content of all factors in 2nd generations are much lower than that in 1st generations except the content of available Cu and available Fe.更多还原