中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 采伐对东北温带次生林土壤氮矿化的长期影响 东北林业大学学报 2018 (10) 48-53
Position: Home > Articles > Long-term Effects of Harvesting on Soil Nitrogen Mineralization in Temperate Secondary Forests of Northeast China Journal of Northeast Forestry University 2018 (10) 48-53

采伐对东北温带次生林土壤氮矿化的长期影响

作  者：
王嗣奇;陈洪连;孙海龙;冯晨辛;孙昶
关键词：
净氮矿化;采伐强度;次生林;土壤
摘  要：
为了解采伐干扰对东北温带次生林土壤氮矿化的长期影响,对黑龙江省帽儿山地区经过不同强度采伐(皆伐后造林、50%强度采伐、25%强度采伐、对照)处理后8 a的次生杂木林为研究对象,采用离子交换树脂芯法测定了生长季不同采伐强度下次生林0~10 cm土层土壤净氮矿化速率和净硝化速率的变化。结果表明:各处理土壤净氮矿化速率和净硝化速率平均值均差异不显著。各处理土壤净氮矿化速率与土壤温度和土壤含水量均呈显著正相关(P<0.01)。不同处理间土壤温度、含水量和有机碳质量分数均无显著差异,这是导致各采伐处理间土壤净氮矿化速率和净硝化速率与对照无显著差异的主要原因。此外,各采伐处理土壤硝态氮平均质量分数与对照亦无显著差异,但皆伐后造林处理土壤铵态氮平均质量分数显著低于其它处理,这可能是由于皆伐后营造的落叶松(Larix gmelini)偏好吸收铵态氮所致。次生林土壤无机氮主要以硝态氮为主,硝态氮占无机氮的比例为49.25%~81.52%,但是各处理间差异不显著。上述结果表明采伐干扰后8 a,东北温带次生杂木林的土壤氮素流失风险已明显降低。
译  名：
Long-term Effects of Harvesting on Soil Nitrogen Mineralization in Temperate Secondary Forests of Northeast China
作  者：
Wang Siqi;Chen Honglian;Sun Hailong;Feng Chenxin;Sun Chang;Northeast Forestry University;
单  位：
Wang Siqi%Chen Honglian%Sun Hailong%Feng Chenxin%Sun Chang%Northeast Forestry University
关键词：
Net N mineralization;;Harvesting intensity;;Secondary forest;;Soil
摘  要：
To explore the long-term effect of harvest intensities on soil nitrogen mineralization of the secondary forests in the northeast of China( including forestation after clear cutting; 50% of the stand volume removed; 25% of the stand volume removed; control) by using ion exchange resin core method,the seasonal change of soil net N mineralization rate and net nitrification rate in the depth of 0-10 cm were investigated in the typical secondary hardwood forest,which have been harvested with different intensities for 8 a. The results showed there was no significant difference in the average net N mineralization rate and net nitrification rate among the treatments( P>0.05). The net N mineralization rate was positively correlated with soil temperature and water content in all the treatments( P<0.01). There was no significant difference in soil temperature,water content and organic carbon content among different treatments( P>0.05). These findings suggest that soil temperature,water content and organic carbon content caused small differences in net N mineralization and nitrification rates among all treatments.There was no significant difference in soil average NO-3-N contents between harvesting treatments and control( P>0.05). However,the average NH+4-N content of forestation after clear cutting was significantly lower than the others,which was probably resulted from the preference of absorbing NH+4-N by Larix gmelini. Soil NO-3-N was the dominant form in mineral N with the proportion of 49.25%-81.52%. There was no significant difference in the ratio of NO-3-N to mineral N among all treatments( P>0.05). These results showed that after being harvested for 8 a,the risk of soil nitrogen loss was decreased significantly in the typical secondary hardwood forests.

相似文章

导出引用
计量
文章访问数: 7
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46