首页|兴安落叶松林凋落物量动态对模拟氮沉降的响应

兴安落叶松林凋落物量动态对模拟氮沉降的响应

扫码查看
通过野外控制性实验,对兴安落叶松林进行凋落物量与氮沉降响应研究.试验设计以NH4Cl、KNO3和NH4NO33种氮肥为氮源,分低氮、中氮、高氮和对照4个处理.通过野外观测发现:对照区凋落物量的范围在3 215.67~4 748.82kg ·hm-2之间,低氮和中氮处理均没达到显著差异(p<0.05);高氮处理后NH4Cl和KNO3、NH4Cl和NH4 NO3、NH4Cl和对照均达到p <0.01上的显著差异;NH4Cl处理后,随着氮浓度的增加凋落物量逐渐减少,具有抑制作用;KN03处理后,氮浓度越高对凋落物产量越具有促进作用.月凋落量表现出明显的季节动态,季节变化呈现单峰型,凋落高峰出现在9月.
THE DYNAMICS OF LITTER FALL RESPONSES TO SIMULATE NITROGEN DEPOSITION IN SING-AN LARCH (Larix gmelinii) FOREST
Study of litter fall responses to nitrogen deposition by controlled experiments in Larix gmelinii.Controlled experiments take three nitrogen fertilizer-NH4Cl,KNO3 and NH4NO3-for nitrogen sources and divide to four treatments with low,middle,high nitrogen level and comparison.Through field observations we found:when litter fall of control area from 3 215.67 to 4 748.82 kg ·hm-2,both low and middle nitrogen level achieve hardly significant effect(p < 0.05);through treatments for NH4Cl and KNO3,NH4Cl and NH4NO3,NH4Cl and comparison all reach significant effect withp <0.01 by high nitrogen level.As nitrogen concentration increasing,litter fall is decreasing and is inhibited with NH4 Cl treatment;after KNO3 treatment,the more nitrogen concentration the more litter fall is promoted.Litter fall month show obvious seasonal dynamics and seasonal change presents unimodal type and litter fall peaked is in September.

Larix gmeliniilitter fallnitrogen deposition

赵鹏武、舒洋、张波、王梓璇、周梅

展开 >

内蒙古农业大学生态环境学院,呼和浩特010019

内蒙古赛罕乌拉森林生态系统国家定位观测研究站,赤峰025150

兴安落叶松林 凋落物量 氮沉降

内蒙古自然科学基金内蒙古自然科学基金内蒙古科技计划项目内蒙古科技计划项目

2012MS05102011MS05062011052720120421

2016

内蒙古农业大学学报(自然科学版)
内蒙古农业大学

内蒙古农业大学学报(自然科学版)

影响因子:0.384
ISSN:1009-3575
年,卷(期):2016.37(2)
  • 2
  • 9