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[1]林玉,聂富育,杨万勤,等.四川盆地西缘4种人工林土壤氮转化酶的季节动态[J].应用与环境生物学报,2019,25(03):634-639.[doi:10.19675/j.cnki.1006-687x.201809013]
 LIN Yu,NIE Fuyu,YANG Wanqin,et al.Seasonal dynamics of soil nitrogen transformation enzymes at four plantations in the western edge of Sichuan basin[J].Chinese Journal of Applied & Environmental Biology,2019,25(03):634-639.[doi:10.19675/j.cnki.1006-687x.201809013]
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四川盆地西缘4种人工林土壤氮转化酶的季节动态
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年03期
页码:
634-639
栏目:
研究论文
出版日期:
2019-06-25

文章信息/Info

Title:
Seasonal dynamics of soil nitrogen transformation enzymes at four plantations in the western edge of Sichuan basin
作者:
林玉聂富育杨万勤刘群李婷婷蒲悦牟凌徐振锋
1四川农业大学生态林业研究所,四川省林业生态工程重点实验室 成都 611130 2四川农业大学华西雨屏区生态环境监测站,长江上游生态安全协同创新中心 成都 611130
Author(s):
LIN Yu1 NIE Fuyu1 YANG Wanqin1 2 LIU Qun1 LI Tingting 1 PU Yue1 MOU Ling1 & XU Zhenfeng1 2**
1 Key Laboratory of Ecological Forestry Engineering of Sichuan Province, Institute of Ecology & Forest, Sichuan Agricultural University, Chengdu 611130, China 2 Monitoring Station for Eco-environments in the Rainy Zone of Southwest China, Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Chengdu 611130, China
关键词:
氮转化酶季节变化环境因子人工林四川盆地
Keywords:
nitrogen transformation enzyme seasonal dynamic environmental factor plantation Sichuan basin
分类号:
S714.8
DOI:
10.19675/j.cnki.1006-687x.201809013
摘要:
于2015年3月、6月、9月和12月采集四川盆地西缘都江堰灵岩山4种人工林(柳杉林、含笑林、桢楠林、麻栎林)两个层次(0-20 cm和20-40 cm)的土壤样品,测定3种与氮转化相关的土壤酶(脲酶、硝酸还原酶和亚硝酸还原酶)活性,比较其季节动态,,为区域人工林生态恢复与重建提供科学依据. 结果显示,相比亚硝酸还原酶,土壤脲酶和硝酸还原酶表现出明显的季节动态. 在同一土壤层次,3种土壤酶活性在不同林型下具有相似的季节动态. 春季时期两个层次土壤脲酶活性显著高于其他3个季节;秋季时期4种人工林均具有较高的土壤硝酸还原酶活性. 土壤脲酶活性4个季节平均值由高到低依次为桢楠林(0.914 mg/g)、含笑林(0.704 mg/g)、柳杉林(0.647 mg/g)和麻栎林(0.640 mg/g);土壤硝酸还原酶活性4个季节平均值由高到低依次为柳杉林(0.017 mg/g)、含笑林(0.016 mg/g)、麻栎林(0.014 mg/g)和桢楠林(0.013 mg/g);亚硝酸还原酶4个季节平均值由高到低依次为桢楠林(0.286 mg/g)、含笑林(0.276 mg/g)、柳杉林(0.273 mg/g)和麻栎林(0.236 mg/g). 方差分析表明林型对土壤酶的影响与季节、土壤层次和酶种类有关. 综上所述,相比于林型,季节动态对土壤氮转化酶活性具有更大的影响. (图2 表3 参32)
Abstract:
The goal of this study was to compare the activities of enzymes involved nitrogen transformation (urease, nitrate reductase, and nitrite reductase), and to provide some scientific reference for ecological restoration in this area. Soil samples of two layers (0–20 cm and 20–40 cm) were collected from 4 plantations (Cryptomeria fortunei, Michelia wilsonii, Phoebe zhennan, and Quercus acutissima) in March, June, September, and December 2015 in the western edge of the Sichuan basin. Soil samples were used to determine three soil enzyme activities (urease, nitrate reductase, and nitrite reductase) involved in nitrogen transformation. Regardless of forest type, there were significant seasonal dynamic differences in soil urease and nitrate reductase, but not for nitrite reductase. Soil urease activity was significantly higher in spring than in the other three seasons. In autumn, all four plantations had relatively high soil nitrate reductase activity as compared to that of the other three seasons. The average values of soil urease over the four seasons was Phoebe zhennan (0.914 mg/g) > Michelia wilsonii (0.703 mg/g) > Cryptomeria fortune (0.647 mg/g) > Quercus acutissima (0.640 mg/g). The average values of soil nitrate reductase in four seasons were Cryptomeria fortune (0.017 mg/g) > Michelia wilsonii (0.016 mg/g) > Quercus acutissima (0.014 mg/g) > Phoebe zhennan (0.013 mg/g). The average values of soil nitrite reductase were Phoebe zhennan (0.286 mg/g) > Michelia wilsonii (0.276 mg/g) > Cryptomeria fortune (0.273 mg/g) > Quercus acutissima (0.236 mg/g). The effects of forest type on soil enzymes were dependent on soil layer, season, and enzyme category. In conclusion, season-driven environmental variations may have stronger effects on soil enzyme activities involved in nitrogen cycling as compared to forest type.

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更新日期/Last Update: 2019-06-25