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当前位置: 首页 > 文章 > 大兴安岭北部针叶林土壤团聚体酶活性研究 森林工程 2020 (4) 1-11
Position: Home > Articles > Study on the Enzyme Activity of Soil Aggregates in Coniferous Forests in the North of Daxing’an Mountains Forest Engineering 2020 (4) 1-11

大兴安岭北部针叶林土壤团聚体酶活性研究

作  者：
朱家琪;满秀玲;张頔;刘思琪
单  位：
关键词：
大兴安岭;兴安落叶松林;樟子松林;水稳性团聚体;酶活性
摘  要：
以大兴安岭北部典型针叶林(兴安落叶松林、樟子松林)为研究对象,通过团聚体脲酶、蔗糖酶、酸性磷酸酶活性以及酶活性几何平均数的测定与分析,探明该地区两种主要针叶林土壤团聚体酶活性的差异,以及随团聚体粒径大小不同酶活性的变化特征。结果表明:①兴安落叶松林0～5 cm土层和樟子松林0～10 cm土层以大团聚体占优势,随着土层加深大团聚体含量下降,两种林型生长季中期大团聚体含量高于生长季初期和末期。②两种林型团聚体酶活性均表现为随粒径减小而增加的一致性规律,以小于0.25 mm微团聚体酶活性最高,且随着土层加深,团聚体酶活性随之降低。兴安落叶松林团聚体脲酶、蔗糖酶活性低于樟子松林,酸性磷酸酶活性高于樟子松林;两种林型团聚体脲酶以生长季初期和末期活性最高,蔗糖酶和酸性磷酸酶均以7—8月生长旺季活性最高。③土壤团聚体酶活性几何平均数表现为樟子松林高于兴安落叶松林,随土层降低而递减,且随粒径增大酶活性平均数降低,两种林型酶活性几何平均数在生长季中期数值较高。
译  名：
Study on the Enzyme Activity of Soil Aggregates in Coniferous Forests in the North of Daxing’an Mountains
作  者：
ZHU Jiaqi;MAN Xiuling;ZHANG Di;LIU Siqi;School of Forestry, Northeast Forestry University;
关键词：
Daxing'an Mountains;;Larix gmelinii forest;;Pinus sylvestris var.mongolica forest;;soil water stable aggregate;;enzyme activity
摘  要：
Taking the typical coniferous forest(Larix gmelinii forest, Pinus sylvestris var. mongolica forest) in the north of Daxing'an Mountains as the research object, the activity of aggregate urease, invertase, acid phosphatase and the geometric mean of enzyme activity were measured and analyzed, in order to find out the difference of enzyme activity between the two main coniferous forests in this area, and the change characteristics of enzyme activity with the particle size of aggregates. The results showed that: ①Large aggregates dominated the 0-5 cm soil layer of Larix gmelinii forest and 0～10 cm soil layer of Pinus sylvestris var. mongolica forest. As the soil deepened, the content of large aggregates decreased, and the content of large aggregates in the middle growth season of the two forest types was higher than that in the early and late growth season. ②The enzyme activity of aggregates of the two types of forest showed a consistent rule of increasing with the decrease of particle size, with the enzyme activity of <0.25 mm microaggregates being the highest, and the enzyme activity of aggregates decreased with the deepening of the soil layer. The activity of the aggregate urease and invertase in Larix gmelinii forest was slightly lower than that in Pinus sylvestris var. mongolica forest, and the activity of acid phosphatase was higher that in Pinus sylvestris var. mongolica forest. The aggregate urease of the two types of forest was the highest at the beginning and end of the growing season, while the activity of invertase and acid phosphatase was the highest in the peak growing season from July to August. ③The geometric mean of the enzyme activity of soil aggregates showed that the Pinus sylvestris var. mongolica forest was higher than that of Larix gmelinii forest, which decreased with the decrease of soil layer, and the mean of enzyme activity decreased with the increase of particle size. The geometric mean of enzyme activity of the two forest types was higher in the middle growing season.

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