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通过对杂木林(山脊)及取代杂木林的杉木丰产林(山坡)土壤微生物数量及活性连续两年周期的研究,结果表明;杉木林和杂木林土壤微生物总数、细菌、真菌、放线菌数量及土壤呼吸作用强度、氨化作用、纤维素分解作用强度具有明显季节变化,夏季和春季土壤微生物数量和活性较大,秋季次之,冬季最低.土壤微生物季节变化与林木年生长发育规律相吻合.与山脊上保留杂木林相比,杉木林(山坡)土壤有机物转化和合成强度有一定程度下降.
The results showed that the total number of soil microorganisms, the number of bacteria, fungi and actinomycetes in soil of Chinese fir and mixed woods were the same as those of the other two years. The intensity of soil respiration, ammonification and cellulose decomposition had obvious seasonal changes. The quantity and activity of soil microorganisms were greater in summer and spring, followed by autumn and the lowest in winter. The seasonal variation of soil microorganisms is consistent with the annual growth and development of trees. Compared with the preservation of mixed woods on the ridges, the conversion and synthesis intensity of soil organic matter in the Chinese fir forest (hillside) decreased to a certain degree.