脲酶

The impact of different degrees of degradation on activities of urease and peroxidase varied.

不同退化程度对脲酶和过氧化物酶活性的影响没有明显的规律性。

However, Zn- phenanthrene and Cd- phenanthrene were synergistic.

Zn和菲，Cd和菲之间的交互作用，无论是对脲酶还是脱氢酶均表现为协同作用。

According to the sensitivities of variance coefficients and relative range of soil properties, we found that nitrate, available phosphorus, labile organic matter, urase, invertase, and organic matter can be used as the assessing index, which can evaluate soil quality under various re-vegetation ecosystems in the Loess Plateau.

根据变异系数和相对极差的敏感性发现在定量评价黄土高原不同植被恢复生态系统土壤质量时，可选择硝态氮、速效磷、活性有机质、脲酶、蔗糖酶和有机质等极敏感和高度敏感土壤性质作为评价指标。

The plant community composition changed and the community coverage increased over the wetland succession from primary swamp, through swampy meadow, to meadow. The number of associated species increased, while the dominant species abundances decreased. Through succession, the content of soil organic matter and total nitrogen declined. In contrast, the soil enzyme activity of catalase, protease and invertase increased; however urase declined.

随着湿地原生沼泽向沼泽化草甸、草甸的演替，湿地植物群落盖度增加、物种组成增多，群落优势种优势度减小，伴生种数量增加，植物多样性呈增加趋势；湿地土壤有机质、全氮含量不断减少，过氧化氢酶、蛋白酶、蔗糖酶活性增加，脲酶活性降低。

The results show, under the long-trem influence of different farming behaviors, the soil, collected from dry-land in low multiple crop index to dry-land in high multiple crop index to composite-land in high multiple crop index, decease in bult density, clay content, total P and activities of catalaes and increase in organic matter, humic acid contents, nitogen, available nitrogen, phosphorus, potassium, soi breathe intensity and urease, phosphatase, protease active content.

选择贵州中部喀斯特山区普定县猫洞小流域地区，通过长期受不同生产行为影响的区域（低复种旱作区、高复种旱作区、高复种复合农作区）的土壤采样分析，结果表明：喀斯特山区小流域土壤在长期不同生产行为影响下，从低复种指数旱作区、高复种指数旱作区到高复种指数复合农作区，土壤容重、粘粒含量减小，而土壤有机质、腐殖酸含量、全氮、碱解氮、速效磷、速效钾、土壤呼吸强度、脲酶、磷酸酶、蛋白酶活性含量依次增大，土壤全钾含量和过氧化氢酶活性却依次减小。

Quantitative expression and effect of combined pollution of heavy metals and polycyclic aromatic hydrocarbons, including phenanthrene, fluoranthene and benzopyrene, on soil enzyme were investigated during 7 weeks of incubation.

以土壤脲酶和脱氢酶为探针物质，室内培养条件下较为系统地研究了重金属和多环芳烃复合污染对土壤酶活性的影响及其定量表征。

Strains of rhizobia were isolated from the leguminous nodules collected in Pamirs Plateau located in Xinjiang, and 118 physiological and biochemical characters of these strains and 36 known control strains such as uses of single carbon and nitrogen sources, antibiotic and dye resistances, salt and alkali tolerances, initial growth pH, growth temperature limits, litmus and milk responses, oxidase, peroxidase and urease were determined and compared.

从新疆帕米尔高原采集豆科植物根瘤，经分离纯化获得68株供试根瘤菌，并选取36株参比菌株，进行唯一碳源利用、唯一氮源利用、对抗生素和染料抗性、耐盐性、初始pH生长、温度生长范围及石蕊牛奶反应、氧化酶、过氧化氧酶、脲酶共117项生理生化性状测定，并进行比较分析。

Second, effects of conservation tillage on soil enzyme activities. SS had higher urease activity and sucrase activity in 0~20cm soil layer.

2保护性耕作对土壤酶活性的影响深还0~20cm土层脲酶和蔗糖酶活性较高。

The action duration of tetracycline on the activities of soil urease, catalase, sucrase and proteinase were 7 weeks, 6-8 weeks, 7 weeks, and 6-7 weeks, respectively.

四环素对土壤脲酶、过氧化氢酶、转化酶和蛋白酶活性的作用时间分别为：7周、6~8周、7周和6~7周。

The results showed that the activities of urease, nitrate reductase, nitrite reductases and the yield of above ground plants were the highest with the fertilization pattern of taking 50 percent nitrogen from organic fertilizer and the other 50 percent nitrogen from urea.

结果表明：采用50%的N由有机肥提供，50%的N由尿素提供的施肥模式时，黑麦草根际土壤脲酶、硝酸还原酶、亚硝酸还原酶活性最强，黑麦草地上部产量最高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。