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Seasonality and moisture regime control soil respiration, enzyme activities, and soil microbial biomass carbon in a semi-arid forest of Delhi, India
Ecological Processes ( IF 4.8 ) Pub Date : 2020-09-26 , DOI: 10.1186/s13717-020-00252-7
Urvashi Tomar , Ratul Baishya

Soil respiration, soil enzymes, and microbial biomass are important in carbon cycling in the terrestrial ecosystem which is generally limited by environmental factors and soil carbon availability. Hence, we tried to assess the factors affecting the functional aspects of these processes in a semi-arid climate. We monitored soil respiration (surface) using a portable infrared gas analyzer (Q-Box SR1LP Soil Respiration Package, Qubit Systems, Canada) equipped with a soil respiration chamber (Model: G 180). Soil respiration was measured at midday during each season throughout the study period. Soil enzymatic activities and microbial biomass carbon (MBC) were analyzed following the standard protocol for a year during peak time in four seasons at 0–10 cm and 10–20 cm depth. Soil respiration shows significant variation with highest in monsoon (3.31 μmol CO2 m−2 s−1) and lowest in winter (0.57 μmol CO2 m−2 s−1). Similarly, β-glucosidase, dehydrogenase, and phenol oxidase activity ranged from 11.15 to 212.59 μg PNP g−1 DW h−1, 0.11 to 16.47 μg TPF g−1 DW h−1, and 4102.95 to 10187.55 μmol ABTS+ g−1 DW min−1, respectively. MBC ranged from 17.08 to 484.5 μg C g−1. Besides, soil respiration, soil enzymes (except β-glucosidase), and MBC were significantly correlated with soil moisture. Seasonality, optimum moisture and temperature played a significant role in determining variations in soil microbiological processes (except β-glucosidase activity); the carbon cycling in the study area is assisted by enzyme activity; dehydrogenase and phenol oxidase played a significant role in soil respiration; hence, this landscape is sensitive to environmental changes.

中文翻译:

季节和湿度控制印度德里半干旱森林的土壤呼吸,酶活性和土壤微生物生物量碳

土壤呼吸,土壤酶和微生物生物量在陆地生态系统的碳循环中很重要,而陆地生态系统的碳循环通常受环境因素和土壤碳利用率的限制。因此,我们试图评估在半干旱气候下影响这些过程功能方面的因素。我们使用配备有土壤呼吸室(型号:G 180)的便携式红外气体分析仪(Q-Box SR1LP土壤呼吸软件包,加拿大Qubit Systems,加拿大)监测土壤呼吸(表面)。在整个研究期间的每个季节的中午测量土壤呼吸。按照标准方案,在0-10厘米和10-20厘米深度的四个季节的高峰时间一年内,分析土壤酶活性和微生物生物量碳(MBC)。土壤呼吸变化显着,季风最高(3。31μmolCO2 m-2 s-1),冬季最低(0.57μmolCO2 m-2 s-1)。同样,β-葡萄糖苷酶,脱氢酶和酚氧化酶的活性范围为11.15至212.59μgPNP g-1 DW h-1、0.11至16.47μgTPF g-1 DW h-1和4102.95至10187.55μmolABTS + g-1 DW min-1。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。57μmolCO2 m-2 s-1)。同样,β-葡萄糖苷酶,脱氢酶和酚氧化酶的活性范围为11.15至212.59μgPNP g-1 DW h-1、0.11至16.47μgTPF g-1 DW h-1和4102.95至10187.55μmolABTS + g-1 DW min-1。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。57μmolCO2 m-2 s-1)。同样,β-葡萄糖苷酶,脱氢酶和酚氧化酶的活性范围为11.15至212.59μgPNP g-1 DW h-1、0.11至16.47μgTPF g-1 DW h-1和4102.95至10187.55μmolABTS + g-1 DW min-1。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。酚氧化酶的活性范围分别为11.15至212.59μgPNP g-1 DW h-1、0.11至16.47μgTPF g-1 DW h-1和4102.95至10187.55μmolABTS + g-1 DW min-1。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。酚氧化酶的活性范围分别为11.15至212.59μgPNP g-1 DW h-1、0.11至16.47μgTPF g-1 DW h-1和4102.95至10187.55μmolABTS + g-1 DW min-1。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。MBC范围从17.08到484.5μgC g-1。此外,土壤呼吸,土壤酶(β-葡萄糖苷酶除外)和MBC与土壤水分显着相关。季节性,最佳湿度和温度在确定土壤微生物过程的变化(β-葡萄糖苷酶活性除外)方面起着重要作用;研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。研究区域的碳循环受酶活性的辅助;脱氢酶和酚氧化酶在土壤呼吸中起重要作用。因此,这种景观对环境变化敏感。
更新日期:2020-09-26
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