CAJ | 학술논문

采用短期（35d）室内好气培养方法，研究福建省武夷山市5种主要茶园土壤（黄壤、红壤、潮砂土、紫色土、高山草甸土）的氮素矿化特征，并探讨土壤矿化作用与土壤理化性质之间的关系。结果表明：35 d的培养试验证实茶园土壤氮矿化过程符合一级反应动力学方程 Ni＝ N0（1－e－kt ）（R2＝0.65～0.98）；茶园土壤潜在可矿化氮库（ N0）为4.15～52.46 mg · kg －1（均值为33.22），土壤氮矿化常数 k 值为0.019～0.343 mg · kg －1· d－1（均值为0.15），土壤氮供应综合指标（ No * k）为0.32～16.82 mg · kg －1· d－1（均值为6.49），矿化率（ N r ）为2.32～6.00％（均值3.73），高山草甸土和黄壤氮矿化参数均显著高于其他土壤类型，紫色土和潮砂土次之，红壤最低。相关分析表明，土壤的△ N、 N0和 k均与土壤有机碳、全氮和矿质氮含量（NH＋4‐N和NO3－‐N）呈显著正相关，与土壤容重呈极显著负相关（P＜0.01），与C／N和pH无显著相关；土壤砂砾和粉粒含量与 k和N0* k间存在显著相关，但其与其他矿化参数相关性不显著。
채용단기（35d）실내호기배양방법，연구복건성무이산시5충주요다완토양（황양、홍양、조사토、자색토、고산초전토）적담소광화특정，병탐토토양광화작용여토양이화성질지간적관계。결과표명：35 d적배양시험증실다완토양담광화과정부합일급반응동역학방정 Ni＝ N0（1－e－kt ）（R2＝0.65～0.98）；다완토양잠재가광화담고（ N0）위4.15～52.46 mg · kg －1（균치위33.22），토양담광화상수 k 치위0.019～0.343 mg · kg －1· d－1（균치위0.15），토양담공응종합지표（ No * k）위0.32～16.82 mg · kg －1· d－1（균치위6.49），광화솔（ N r ）위2.32～6.00％（균치3.73），고산초전토화황양담광화삼수균현저고우기타토양류형，자색토화조사토차지，홍양최저。상관분석표명，토양적△ N、 N0화 k균여토양유궤탄、전담화광질담함량（NH＋4‐N화NO3－‐N）정현저정상관，여토양용중정겁현저부상관（P＜0.01），여C／N화pH무현저상관；토양사력화분립함량여 k화N0* k간존재현저상관，단기여기타광화삼수상관성불현저。
For this study ,5 types of soils at tea plantations ,i . e .,yellow ,red ,moist sandy ,alpine meadow and purple soils ,collected from Wuyishan City in Fujian were incubated at 28℃with a 60% water holding capacity for 35 days .The nitrogen (N) mineralization and its correlation with the properties of the soils were analyzed .A first‐order kinetic model derived from the experimental data was obtained:Ni= N0 (1-e-kt ) (R2 =0.65-0.98) ,where Ni is the cumulative mineralized N at incubation time t;N0 ,the potential mineralizable N pool;and k ,the first order rate constant .N0 for the soils ranged from 4.15 to 52.46 mg · kg -1 (averaging 33.22 mg · kg -1 );k from 0.019 to 0.343 mg · kg -1 · d-1 (averaging 0.15 mg · kg -1 · d-1 );N0 × k from 0.32 to 16.82 mg · kg -1 · d-1 (averaging 33.22 mg · kg -1 · d-1 );and the N mineralization rate (Nr ) from 2.32 to 6.00% (averaging 3.73% ) . All parameters of the N mineralization in the alpine meadow and yellow soils were significantly higher than those in the others .They were followed by the moist sandy and purple soils ,while the red soil was the lowest .△ N ,N0 ,k and N0 × k were significantly correlated with the soil organic carbon ,as well as the total N ,NH+4 ‐N and NO3-N . They also significantly correlated reversely with the soil bulk density ,but not significant correlated with C/N or pH .The sand and silt contents in the soil significantly correlated with k and N0 × k ,but not with other indicators .