红壤微生物学特性——(二)浙江省低丘红壤的酶和呼吸活性

第一报报导了红壤微生物总数、各类微生物在总数中所占比例、呼吸强度、硝化作用、纤维分解强度及固氮菌数量等与红壤熟化程度的关系.本文进一步探讨不同熟化程度的红壤中酶和呼吸活性及其与土壤肥力的关系.

THE MICROBIOLOGICAL CHARACTERISTICS OF RED SOILS (2) THE ENZYME AND RESPIRATORY ACTIVITY OF THE HILLY RED SOILS DERIVED FROM QUARTERNARY RED CLAY OF CHEKIANG

1. Activities of proteinase, urease, sucrase and dehydrogenase in red soils increased with the improvement in soil fertility. There was a positive correlation between the enzyme activity and the respiratory capacity. The study of the microbiological characteristics of red soils showed clearly that the abundance of soil microorganisms, respiratory capacity and enzyme activities are correlated with the improvement in soil fertility, and as a consequence such a correlation may be used as an index of soil fertility. 2. The activities of proteinase, urease and sucrase decreased with the increase of soil depth in fertile soils, but such a tendency was not so clear with dchydrogenase and peroxidase activities as with the above mentioned enrymes.