农业环境科学学报
農業環境科學學報
농업배경과학학보
Journal of Agro-Environment Science
2015年
6期
1149-1157
,共9页
范利超%韩文炎%李鑫%李治鑫
範利超%韓文炎%李鑫%李治鑫
범리초%한문염%리흠%리치흠
茶园%有机碳%水溶性有机碳%微生物生物量碳%土壤基础呼吸%垂直分布
茶園%有機碳%水溶性有機碳%微生物生物量碳%土壤基礎呼吸%垂直分佈
다완%유궤탄%수용성유궤탄%미생물생물량탄%토양기출호흡%수직분포
tea%soil organic carbon%WSOC%MBC%soil basal respiration%vertical distribution
对茶园及相邻林地土壤基础呼吸的垂直分布特征进行了研究，并试图寻求其与土壤有机碳（SOC）、水溶性有机碳（WSOC）、微生物生物量碳（MBC）的关系。结果表明茶园和林地土壤有机碳、土壤呼吸积累量、水溶性有机碳和微生物生物量碳均随着土壤深度的增加而减少，且茶园均值大于林地。在0~100 cm土壤层次内，茶园土壤质量敏感性指标（WSOC/SOC）平均值、代谢熵（qCO2）平均值均大于林地，微生物熵（qMBC）平均值小于林地。茶园和林地土壤基础呼吸速率与SOC、WSOC及MBC呈显著正相关，向后筛选回归模型表明对茶园土壤基础呼吸的影响作用依次为SOC>MBC>WSOC，对林地土壤基础呼吸的影响作用则为WSOC>SOC>MBC。茶园土壤代谢作用强于林地，但茶园有机碳库的稳定性比林地差，不利于土壤有机碳库的积累，为促进茶叶生产的持续健康发展，茶园土壤需要更加科学合理的施肥和耕作措施。
對茶園及相鄰林地土壤基礎呼吸的垂直分佈特徵進行瞭研究，併試圖尋求其與土壤有機碳（SOC）、水溶性有機碳（WSOC）、微生物生物量碳（MBC）的關繫。結果錶明茶園和林地土壤有機碳、土壤呼吸積纍量、水溶性有機碳和微生物生物量碳均隨著土壤深度的增加而減少，且茶園均值大于林地。在0~100 cm土壤層次內，茶園土壤質量敏感性指標（WSOC/SOC）平均值、代謝熵（qCO2）平均值均大于林地，微生物熵（qMBC）平均值小于林地。茶園和林地土壤基礎呼吸速率與SOC、WSOC及MBC呈顯著正相關，嚮後篩選迴歸模型錶明對茶園土壤基礎呼吸的影響作用依次為SOC>MBC>WSOC，對林地土壤基礎呼吸的影響作用則為WSOC>SOC>MBC。茶園土壤代謝作用彊于林地，但茶園有機碳庫的穩定性比林地差，不利于土壤有機碳庫的積纍，為促進茶葉生產的持續健康髮展，茶園土壤需要更加科學閤理的施肥和耕作措施。
대다완급상린임지토양기출호흡적수직분포특정진행료연구，병시도심구기여토양유궤탄（SOC）、수용성유궤탄（WSOC）、미생물생물량탄（MBC）적관계。결과표명다완화임지토양유궤탄、토양호흡적루량、수용성유궤탄화미생물생물량탄균수착토양심도적증가이감소，차다완균치대우임지。재0~100 cm토양층차내，다완토양질량민감성지표（WSOC/SOC）평균치、대사적（qCO2）평균치균대우임지，미생물적（qMBC）평균치소우임지。다완화임지토양기출호흡속솔여SOC、WSOC급MBC정현저정상관，향후사선회귀모형표명대다완토양기출호흡적영향작용의차위SOC>MBC>WSOC，대임지토양기출호흡적영향작용칙위WSOC>SOC>MBC。다완토양대사작용강우임지，단다완유궤탄고적은정성비임지차，불리우토양유궤탄고적적루，위촉진다협생산적지속건강발전，다완토양수요경가과학합리적시비화경작조시。
In this study, the vertical distributions of soil organic carbon(SOC), water soluble organic carbon(WSOC), microbial biomass carbon(MBC)and soil basal respiration(SBR)in tea soils and their adjacent woodland soils were determined to explore the relationship be-tween soil basal respiration rate and SOC, WSOC and MBC. Results showed that SOC, WSOC, MBC and soil cumulative respiration flux were all greater in tea garden than in woodland, and decreased with increasing soil depth in both types of soils. Biological activity indicators (SWOC/SOC and qCO2)in the tea garden soils were also greater than those in the woodland soils. However, qMBC in the tea garden was less than that in the woodland. Soil respiration rate was significantly and positively correlated with SOC, WSOC and MBC. Multiple linear regression by“Backward Elimination”method showed that soil respiration rate was affected by SOC>MBC>WSOC in the tea garden soils, but by WSOC>SOC>MBC in the woodland soils. Soil metabolism was greater in the tea garden than in the woodland soils. The stability of soil carbon pools in the tea garden was less than that in the woodland, implying less accumulation of soil organic carbon in tea garden than in woodland. More attention to scientific and reasonable fertilization and tillage management is necessary to maintain soil sustainability of tea gardens.
