安吉毛竹林分改造对地表径流及氮磷流失的影响
发布时间：2018-10-26 17:03
【摘要】：为了探究不同经营模式对毛竹林降雨后地表径流及氮磷流失的影响,于2013年1月至2014年10月,通过在浙江安吉县毛竹纯林中种植红豆杉、香榧、红茴香、朱砂根4种经济灌木,建立了不同的毛竹林经营模式;随后测定了毛竹林样地降雨、径流量和径流氮磷浓度等指标。结果表明,15次地表径流事件中,各样地累计径流量为3.06~9.22m3,总氮流失量为总磷的7.6倍,其中铵态氮流失量为硝态氮的2.5倍,但通过林分改造能显著降低铵态氮与硝态氮比例。与毛竹纯林对比,4种林分改造模式两年累计径流对比毛竹纯林减少40.0%~66.8%,累计总磷流失减少64.0%~83.8%,总氮流失减少49.1%~78.8%,硝态氮流失减少37.4%~76.2%,铵态氮流失减少42.8%~80.4%。4种林分改造模式对地表径流流量和氮磷流失的削减作用均为种植红豆杉最好。
[Abstract]:In order to investigate the effects of different management patterns on surface runoff and nitrogen and phosphorus loss after rainfall, four economic shrubs, Taxus chinensis, Torreya grandis, Carnophylla sinensis and cinnabar root, were planted in pure forest of Phyllostachys pubescens in Anji County, Zhejiang Province from January 2013 to October 2014. Different management models of Phyllostachys pubescens were established. Then, rainfall, runoff and nitrogen and phosphorus concentration in bamboo forest were measured. The results showed that the accumulative runoff of each land was 3.06 ~ 9.22 m ~ (3), the total nitrogen loss was 7.6 times of total phosphorus, and the loss of ammonium nitrogen was 2.5 times as much as nitrate nitrogen, in the 15 surface runoff events, the total runoff was 3.06 ~ (9. 22) m ~ (3), and the total nitrogen loss was 7.6 times of total phosphorus. But the ratio of ammonium nitrogen to nitrate nitrogen can be significantly reduced by stand modification. Compared with the pure forest of Phyllostachys pubescens, the total runoff of the four types of forest was reduced by 40.0%, the total phosphorus loss was reduced by 64.0% and 83.8%, and the total nitrogen loss was reduced by 49.1and 78.8%, respectively. The reduction of nitrate nitrogen loss and ammonium nitrogen loss was 37.4% and 42.8% respectively. The reduction of surface runoff and nitrogen and phosphorus loss was the best in planting Taxus chinensis.
【作者单位】： 中国林业科学研究院亚热带林业研究所;浙江省安吉县林业局;
【基金】：中国林科院中央级公益性科研院所基金项目(CAFYBB2016SY009) 浙江省林业厅推广项目(2017B05) 中央级公益性科研院所基金重点项目(RISF2013001)
【分类号】：S714.7
[Abstract]:In order to investigate the effects of different management patterns on surface runoff and nitrogen and phosphorus loss after rainfall, four economic shrubs, Taxus chinensis, Torreya grandis, Carnophylla sinensis and cinnabar root, were planted in pure forest of Phyllostachys pubescens in Anji County, Zhejiang Province from January 2013 to October 2014. Different management models of Phyllostachys pubescens were established. Then, rainfall, runoff and nitrogen and phosphorus concentration in bamboo forest were measured. The results showed that the accumulative runoff of each land was 3.06 ~ 9.22 m ~ (3), the total nitrogen loss was 7.6 times of total phosphorus, and the loss of ammonium nitrogen was 2.5 times as much as nitrate nitrogen, in the 15 surface runoff events, the total runoff was 3.06 ~ (9. 22) m ~ (3), and the total nitrogen loss was 7.6 times of total phosphorus. But the ratio of ammonium nitrogen to nitrate nitrogen can be significantly reduced by stand modification. Compared with the pure forest of Phyllostachys pubescens, the total runoff of the four types of forest was reduced by 40.0%, the total phosphorus loss was reduced by 64.0% and 83.8%, and the total nitrogen loss was reduced by 49.1and 78.8%, respectively. The reduction of nitrate nitrogen loss and ammonium nitrogen loss was 37.4% and 42.8% respectively. The reduction of surface runoff and nitrogen and phosphorus loss was the best in planting Taxus chinensis.
【作者单位】： 中国林业科学研究院亚热带林业研究所;浙江省安吉县林业局;
【基金】：中国林科院中央级公益性科研院所基金项目(CAFYBB2016SY009) 浙江省林业厅推广项目(2017B05) 中央级公益性科研院所基金重点项目(RISF2013001)
【分类号】：S714.7
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