杉木根际与非根际土壤酶活性比较

杉木根际与非根际土壤酶活性比较陈ｆ竣（中国林业科学研究院林业研究所北京１０００９１）李传涵（华中农业大学土化系武汉４３００７０）关键词杉木,根际土壤,土壤酶,杉木中毒由于林木生长的影响,使得林木根际土壤ｐＨ值、养分含量、微生物数目、生化活性等性质发生...

COMPARISON IN ENZYME ACTIVITIES BETWEEN THE SOILS IN RHIZOSPHERE AND NON-RHIZOSPHERE OF CUNNINGHAMIA LANCEOLATA(LAMB.)HOOK

The differences in the enzyme activities and chemical properties of the rhizosphere and non rhizosphere soils of Cunninghamia lanceolata were studied.The results showed that(1)pH value was lower in the soil in the rhizosphere than in the nonrhizosphere, while the content of organic matter,total N,total P, inorganic P, organic P, available N, K,Cu and Zn,exchangable Ca and Mg was significantly higher in the rhizosphere soil than in the non-rhizosphere soil at 0.05 or 0.01 level;(2) Acid and neutral phosphatase,urease,invertase,catalase,peroxidase activities were significantly higher in the rhizosphere soil than in the non -rhizosphere soil, and XR -XS value was successively 1.44,0.66,0.21,24.92,5.00.1. 01.Except that polyphenol oxidase activity was lower in the rhizosphere than in the non-rhizosphere soils, XR - XS value was -6. 80;(3)The effect of the growth of Cunninghamia lanceolata on soil enzyme activity was named "rhizosphere effects".The degree of rhizosphere effects among soil enzyme activities was orderly invertase,urease,catalase, nuotral and acid phosphatase, peroidase, polyphenol oxidase and the R/S values were 3.10,2.74,2.03, 2.01, 1.91, 1. 44, and 0.47respectivelly.