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采用原位OTCs模拟增温和LICOR-6400-09土壤呼吸室法,研究了杭州湾滨海湿地芦苇群落土壤呼吸及土壤酶活性对温度升高的响应.结果表明,通过短期的模拟增温,土壤呼吸速率与对照相比提高了17.36%;增温和对照的土壤呼吸速率日变化幅度分别为:3.23±0.29和2.75±0.68μmol/(m2.s);日动态变化呈单峰曲线,峰值出现在14:00左右,最低值在早上6:00;增温和对照下的土壤呼吸速率与10cm土壤温度呈极显著的指数相关性(p<0.01);与空气温度呈显著性指数相关性(p<0.05);增温和对照处理下Q10值分别为:3.42和2.74;在0～10cm土层,β-葡萄糖苷酶、蔗糖酶活性比对照有显著的提高(p>0.05),脲酶酶活性也有一定的提高(0.76%),碱性磷酸酶活性比对照略有降低(2.54%).
In situ OTC simulated warming and LICOR-6400-09 soil respiration chamber method were used to study the responses of soil respiration and soil enzyme activity to the increase of temperature in the reed community in Hangzhou Bay coastal wetland.The results showed that the soil The respiration rate was increased by 17.36% compared with that of the control. The diurnal variation of soil respiration rate was 3.23 ± 0.29 and 2.75 ± 0.68μmol / (m2.s) respectively in the warming and control. The daily dynamic change showed a single peak curve and the peak appeared At 14:00, the lowest value was at 6:00 in the morning. The soil respiration rate under warming and control was significantly and exponentially correlated with 10 cm soil temperature (p <0.01), and significantly correlated with air temperature ( (P <0.05). The Q10 values under heating and control treatments were 3.42 and 2.74, respectively. The activities of β-glucosidase and invertase were significantly higher than those of the control at 0-10 cm soil layer (p> 0.05) Activity was also increased (0.76%), alkaline phosphatase activity slightly lower than the control (2.54%).