期刊论文

Tian, D.-L.

中文

生态学报

1000-0933

2009

29

3

1607-1615

10.3321/j.issn:1000-0933.2009.03.060

湖南省***基金资助项目（07JJ1004）； 国家林业局“948”资助项目（2007-4-19）； 国家自然科学基金资助项目（30571487）； 湖南省科技厅重点资助项目（06FJ3083、05NK3026）； 中南林业科技大学青年科学研究基金资助项目（07024B）；

本校为第一且通讯机构

2007年7月,用树脂芯原位测定土壤无机氮含量的方法,对湖南杉木、马尾松、樟树和枫香4种森林群落的土壤氮矿化进行了研究.研究结果表明,经过28d培养,4种森林群落土壤中NH~+_4-N含量分别下降了31.4%～50.5%,NO~-_3-N含量增加了8.2～17.3倍,氮矿化主要表现为硝化作用;氮矿化速率由大到小依次为樟树(0.05mg·kg~(-1)·d~(-1))>马尾松(0.04 mg·kg~(-1)·d~(-1))>枫香(-0.12 mg·kg~(-1)·d~(-1))>杉木(-0.15 mg·kg~(-1)·d~(-1)).在4个森林群落的土壤中,NH~+_4-N是无机氮的主要存在形式,表现为在杉木群落中占78.42%、在马尾松中占79.17%、在樟树中占71.14%和枫香中占79.22%,而且NH~+_4-N的变化可以...

Nitrogen mineralization was evaluated in four forest communities in Hunan, which were Camphor community, Masson Pine community, Sweetgum community, and Chinese Fir community. The resin-core technique was employed to determining net mineralization rates under field conditions. The N mineralization was analyzed before and after 28 d. The results indicated that the ammonia nitrogen and nitrate nitrogen were 8. 63-20. 5 nig-kg-1 and 0. 27 - 0. 64 mg'kg-1before the experiment, respectively. After 28d incubation, ammonia nitrogen decreased 31. 4%-50. 5% and nitrate nitrogen increased 8.2-17.3 times ...