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以长株潭亚热带红壤地区为研究区,采用碱液(NaOH)吸收法对植物非生长季节(2011年12月-2012年5月)水田、旱地、马尾松林地和草地4种土地利用类型的土壤呼吸速率进行了测定,并结合水热等因子,对不同土地利用类型土壤呼吸速率的时间差异进行了因果分析.研究结果表明:4种土地利用类型土壤呼吸速率日变化呈单峰曲线,与气温变化趋势一致,水田和旱地土壤呼吸速率在中午最高,马尾松林地和草地土壤呼吸速率在晚上最高;在季节变化中,12月至5月份土壤呼吸速率总体呈上升趋势,但马尾松林地土壤呼吸速率1月份低于12月份、4月份低于3月份,草地则2月份低于1月份、4月份低于3月份;4种土地利用类型的平均土壤呼吸速率由大到小依次为:草地、马尾松林地、水田和旱地;土壤呼吸率主要与气温、土壤温度、湿度、植被生长特性、生物和人类活动等相关.
Taking the area of red soils in the Chang-Zhu-Tan sub-region as study area, four kinds of land-use types of paddy field, dry land, Pinus massoniana forest and grassland in non-growing season (December 2011-May 2012) The soil respiration rate was measured and the causal analysis of soil respiration rate in different land use types was carried out with the combination of hydrothermal and other factors.The results showed that the diurnal variation of soil respiration rate showed a single peak curve, The change trend of temperature was the same, the soil respiration rate in paddy field and dry land was the highest at noon, and the soil respiration rate in Pinus massoniana forest and grassland was the highest at night. During the seasons, the soil respiration rate in December-May was generally on the rise, Respiration rate in January was lower than in December, April was lower than in March, while in February, grassland was lower than January and April was lower than March. Average soil respiration rates of four land use types were: , Pinus massoniana forest, paddy field and dry land. The soil respiration rate is mainly related to temperature, soil temperature, humidity, vegetation growth characteristics, biological and human activities.