不同生态地理区域杉木人工林土壤微生物及生化活性的研究

 本文研究了广西龙胜县里骆林区、宜山县庆远林区、岑溪县七坪林区和田林县老山林区四种不同生态地理区域杉木人工林土壤微生物及其生化活性。研究结果表明：1．土壤微生物的总数及各类群数量均以龙胜县里骆林区和田林县老山林区杉木人工林土壤最高，岑溪县七坪林区次之，宜山县庆远林区最低。2．土壤生化活性包括土壤氮的转化强度，土壤碳的氧化代谢能力和土壤酶活性，也均以龙胜县里骆林区和田林县老山林区杉木人工林土壤最强，岑溪县七坪林区次之，宜山县庆远林区最弱。3．四种不同生态地理区域杉木人工林生长状况与土壤微生物的数量分布和生化活性表现相似规律，龙胜县里骆林区和田林县老山林区杉木人工林林木生长最好，岑溪县七坪林区次之，宜山县庆远林区最差。

A STUDY ON MICROOGANISM AND BIOCHEMICAL ACTIVITY OF CHINESE-FIR PLANTATION ON DIFFERENT ECOLOGICAL AREA IN GUANGXI

In this paper, We studied soil microoganism and biochemical activities of Chinese-fir plantation on the four different ecological area of Longshen county, Yishan county, Cenxi county and Tianlin county in Guangxi. The results of the studies indicate. 1. In terms of the amount of microbe and the quantity of groups, the forest areas of the Lilou in Longshen county and the Laoshan in Tianlin county appear to be the greatest, and the Qiping of Cenxi county the scond, and the Qingyuan of the Yishan county the least. 2. The soil boichemical activities (the stransformable intensity of soil nitrogen, the stransformable intensity of carbon in soil, soil enzymes activities, soil respiration intensity) were the highest on the Lilou and Laoshan, and the Qiping were the second, and the Qingyuan were the lowest. 3. In the four different Chinese-fir plantation areas, the stand growing is the best in Lilou and Laoshan, and the Qiping is the second, and the Qingyuan is the poorest. This′s also the order of the amount distribution of soil microbe and the biochemical activities in these areas.