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中文摘要：
对不同利用方式19个黑土样品的微生物量和养分进行了分析，结果表明林地的微生物量明显高于玉米地和大豆地，但玉米地和大豆地之间未表现出显著差异，土壤微生物量和土壤养分含量大体上都呈现出林地〉大豆地〉玉米地的一致的趋势；同时土壤微生物量与土壤有机质、全氦、全磷、速效钾和碱解氮呈现出显著或极显著正相关关系，分析结果还表明土壤微生物量碳作为评价土壤肥力指标比土壤微生物量氮更为灵敏。因此，土壤微生物量可以作为评价不同利用方式的黑土肥力水平的一个生物指标。
英文摘要：
To find out a new and effective indicator for the evaluation of soil fertility properties, microbial biomass and nutrients of black soil samples in the Northeast of China were analyzed. It was shown that microbial biomass of forest soil was higher than that of maize and soybean cropping soil, but there was no significant difference between maize and soybean soil. Significant correlation was found between microbial biomass and soil organic matter, total N, total P, available Potassium and hydrolazable N. It was also shown that evaluating soil fertility with soil microbial biomass carbon was better than with soil microbial biomass nitrogen. Hence, microbial biomass could be considered as an indicator of soil fertility.
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