各处理在同一生育期微生物量氮差异的原因主要是所施肥料种类的不同。
The differences of the biomass N in different treatments in same stage were mainly caused by difference in fertilizers.
继续增加施氮量，土壤微生物量氮含量增加，但土壤中残留大量硝态氮，易淋溶损失。
Applying more nitrogen would increase the content of soil microbial biomass nitrogen, but might result in large amount of nitrate residue in soil and suspected to leaching loss.
结果表明，长期施用有机肥或化肥均能增加土壤生物量氮数量，尤以有机肥的作用明显。
Results showed that long term application of NPK fertilizers or manure could increase soil biomass-N, especially the effect of manure on biomass-N was obvious.
随着免耕年限延长，土壤微生物量碳、氮均呈逐渐降低的趋势，免耕10年以上土壤微生物量碳最低，微生物量氮在免耕7～8年时最低。
The microbial biomass C and N were lowest in no-tillage 10 and 7~8 years, respectively, and then decreased along with the the no-tillage years increasing.
浮萍种群增长能力极强，主要通过生物量的增长实现对氮磷营养的吸收去除。
Duckweed population grows rapidly and removes the nutrients mainly by biomass increasing.
结果表明：长期不同施肥处理对土壤微生物量碳和氮产生显著影响。
The results indicated that soil biomass carbon and nitrogen were remarkably influenced by fertilization.
不同种植年限苜蓿地土壤微生物量碳、氮存在差异。
There were obvious difference on soil microorganism carbon and nitrogen among different alfalfa grounds.
土壤微生物量碳、氮、磷与植被类型和植被恢复年限关系密切。
Soil Cmic, Nmic and Pmic are significantly related with vegetation type and rehabilitation age.
通过对不同肥力水平黑土、棕壤、黄棕壤、红壤土壤微生物量碳氮的比较，研究和探讨土壤微生物量碳氮与土壤肥力的关系。
To find out the relationship between soil microbial biomass C and N and soil fertility, soil microbial biomass C and N were compared in several types of soil with different fertilization levels.
生物量-N 与酸解的氨基酸态氮及未知态氮都有显著相关性。
The amount of soil biomass-N was markedly increased by the application of fertilizers.
测定秸秆和土壤有机质分解过程中CO_2释放量、土壤微生物量和土壤无机氮含量变化，探讨土壤有机质和秸秆分解的规律。
The mechanism of Soil organic matter and wheat straw decomposition were discussed through the accumulated CO2, microbial biomass and inorganic nitrogen content.
研究结果表明，在整个培养过程中，仅加莠去津的土壤中微生物生物量碳、氮、磷的含量均显著降低，与对照相比，分别平均降低了13.5%，10.1%，20.0%。
Results showed that soil microbial biomass C, N, P significantly decreased after addition of atrazine. As composed with control, microbial biomass C, N and P decreased averagely 13.5%, 10.1%, 20.0%.
设施土壤速效养分增加对土壤微生物量碳、氮、磷有明显影响。
Compared with available nitrogen, increased available phosphorus just had the opposite effects to soil microbial biomass.
各处理土壤微生物生物量碳、氮含量因培养时期不同而异。因此，生产中利用秸秆时应考虑不同施肥处理秸秆养分含量的差异。
Therefore, in agricultural practices, the differences in the nutrient contents of straw due to different fertilization should be considered when the straw was to be added into soil.
单独施氮处理也增加了两种幼苗的株高和总生物量。
The two species seedlings respond differently to the combination of elevated temperature and nitrogen addition.
单独施氮处理也增加了两种幼苗的株高和总生物量。
The two species seedlings respond differently to the combination of elevated temperature and nitrogen addition.
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