艾比湖湿地土壤有机碳及其组分含量垂直分布研究
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摘要
为了厘清干旱气候区湿地土壤有机碳及其不同组分含量的分布特征,并揭示其主要影响因子,本文以艾比湖湿地为研究区域,选取6种典型生境(奎屯林间洼地、阿其克苏河芦苇沼泽、石头房子干涸湖床、精河河口漫滩、艾比湖湖滨、博河河口漫滩),对其土壤有机碳及不同组分含量的垂直分布特征及其影响因子进行了分析,研究结果表明：
(1)艾比湖湿地6种典型生境土壤有机碳、轻组有机碳(仅奎屯林间洼地、阿其克苏河芦苇沼泽、艾比湖湖滨20～50cm土层存在)、可溶性有机碳、微生物量碳和易氧化态碳含量都较低,分别为1.08～11.49g·kg-1、0.019～0.111g·kg-1、41.6～151.3mg·kg-1、8.23～609.58mg·kg-1和0.06～2.38g·kg-1,平均值分别为4.73g·kg-1、0.074g·kg-1、81.0mg·kg-1、134.01mg·kg-1和0.70g·kg-1,变异系数分别为61.6%、27.3%、39.6%、100.41%和87.9%;
(2)总体来看,6种典型生境中,奎屯林间洼地的土壤有机碳及其不同组分的含量较高,博河河口漫滩较低；
(3)6种典型生境土壤有机碳密度介于0.08～2.04kg·m-2,平均含量为0.74kg·m-2,变异系数为66.6%,奎屯林间洼地有机碳密度最大,博河河口漫滩有机碳密度最小；
(4)土壤有机碳及其不同组分之间均呈极显著正相关(p<0.01),粘粒含量、含水量和全氮含量对土壤有机碳及其不同组分含量具有极显著的影响(p<0.01)。
To clarify the distrubution regular of soil organic carbon, soil organic carbon fractions and the influencing factors, six typical of habitas in Ebinur Lake Wetland were choosen. The six typical habitas were Kuitun wetland,Aqikesu wetland,Shitoufangzi wetland,Jing river wetland,Ebinur lakefront wetland and Bo river wetland.The vertical distribution and its influencing factors of the soil organic carbon and its fractions were analyzed. The results showed:
(1) The soil organic carbon,light fraction organic carbon(only exists in Kuitun wetland, Aqikesu wetland and 20-50cm of Ebinur lakefront wetland),dissolved organic carbon,soil microbial biomass carbon and easy oxidation state carbon of the six typical habitas in Ebinur Lake Wetland were all low. The contents were 1.08～11.49g·kg-1、0.019～0.111g·kg-1、41.6-151.3mg-kg-1、8.23～609.58mg·kg-1 and 0.06～2.38g·kg-1.The average contents were 4.73g-kg-1、0.074g·kg-1、81.0mg·kg-1、134.01mg·kg-1 and 0.70g～kg-1. The variation were 61.6%、27.3%、39.6%、100.41% and 87.9%.
(2) In the whole, the content of soil organic and its fraction in Kuitun wetland was higher than others, and the Bo river wetland was the lowest of all.
(3) The organic carbon reserves of the six typical habitas was 0.08 to 2.04 kg·m-2. The average soil organic carbon content was 0.74kg·m-2, and the averge variation was 66.6%. The organic carbon reserves of Kuitun wetland was the highest and the Bo river wetland was the lowest.
(4) There were significant correlation between soil organic and its fractions(p<0.01). Soil moisture content,the silt content and the total nitrogen were all significantly influencing on the soil organic carbon and its fractions(p<0.01).
(1)艾比湖湿地6种典型生境土壤有机碳、轻组有机碳(仅奎屯林间洼地、阿其克苏河芦苇沼泽、艾比湖湖滨20～50cm土层存在)、可溶性有机碳、微生物量碳和易氧化态碳含量都较低,分别为1.08～11.49g·kg-1、0.019～0.111g·kg-1、41.6～151.3mg·kg-1、8.23～609.58mg·kg-1和0.06～2.38g·kg-1,平均值分别为4.73g·kg-1、0.074g·kg-1、81.0mg·kg-1、134.01mg·kg-1和0.70g·kg-1,变异系数分别为61.6%、27.3%、39.6%、100.41%和87.9%;
(2)总体来看,6种典型生境中,奎屯林间洼地的土壤有机碳及其不同组分的含量较高,博河河口漫滩较低；
(3)6种典型生境土壤有机碳密度介于0.08～2.04kg·m-2,平均含量为0.74kg·m-2,变异系数为66.6%,奎屯林间洼地有机碳密度最大,博河河口漫滩有机碳密度最小；
(4)土壤有机碳及其不同组分之间均呈极显著正相关(p<0.01),粘粒含量、含水量和全氮含量对土壤有机碳及其不同组分含量具有极显著的影响(p<0.01)。
To clarify the distrubution regular of soil organic carbon, soil organic carbon fractions and the influencing factors, six typical of habitas in Ebinur Lake Wetland were choosen. The six typical habitas were Kuitun wetland,Aqikesu wetland,Shitoufangzi wetland,Jing river wetland,Ebinur lakefront wetland and Bo river wetland.The vertical distribution and its influencing factors of the soil organic carbon and its fractions were analyzed. The results showed:
(1) The soil organic carbon,light fraction organic carbon(only exists in Kuitun wetland, Aqikesu wetland and 20-50cm of Ebinur lakefront wetland),dissolved organic carbon,soil microbial biomass carbon and easy oxidation state carbon of the six typical habitas in Ebinur Lake Wetland were all low. The contents were 1.08～11.49g·kg-1、0.019～0.111g·kg-1、41.6-151.3mg-kg-1、8.23～609.58mg·kg-1 and 0.06～2.38g·kg-1.The average contents were 4.73g-kg-1、0.074g·kg-1、81.0mg·kg-1、134.01mg·kg-1 and 0.70g～kg-1. The variation were 61.6%、27.3%、39.6%、100.41% and 87.9%.
(2) In the whole, the content of soil organic and its fraction in Kuitun wetland was higher than others, and the Bo river wetland was the lowest of all.
(3) The organic carbon reserves of the six typical habitas was 0.08 to 2.04 kg·m-2. The average soil organic carbon content was 0.74kg·m-2, and the averge variation was 66.6%. The organic carbon reserves of Kuitun wetland was the highest and the Bo river wetland was the lowest.
(4) There were significant correlation between soil organic and its fractions(p<0.01). Soil moisture content,the silt content and the total nitrogen were all significantly influencing on the soil organic carbon and its fractions(p<0.01).
引文
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