[Effects of nitrogen fertilization on ectomycorrhizal infection of first order roots and root morphology of Larix gmelinii plantation].
In this paper, the first order roots of Larix gmelinii plantation under N fertilization were sampled from different soil depths in different seasons to study their morphology under effects of ectomycorrhizal fungi. The results showed that the infection rate of ectomycorrhizal fungi on the first order roots was significantly affected by soil N availability, soil depth, and season. N fertilization induced a decrease of the infection rate, and the decrement varied with soil depth and season. In comparing with the control, the infected first order roots had an obvious variation of their morphology, e. g., averagely, root diameter increased by 18.7%, root length decreased by 23.7%, and specific root length decreased by 16.3%, which differed significantly with N application rate, soil depth, and season. The infection of ectomycorrhizal fungi changed the first order root morphology of L. gmelinii, which might substantially affect the physiological and ecological processes of host plant fine roots.
Sun
Yue
Y
School of Forestry, Northeast Forestry University, Harbin 150040, China.
Quan
Xian-Kui
XK
Jia
Shu-Xia
SX
Gu
Jia-Cun
JC
Guo
Da-Li
DL
Wang
Zheng-Quan
ZQ
D005308:Fertilizers; D028221:Larix / Q000187:drug effects* / Q000254:growth & development / Q000382:microbiology; D038821:Mycorrhizae / Q000187:drug effects* / Q000254:growth & development; D009584:Nitrogen / Q000032:analysis / Q000494:pharmacology*; D018517:Plant Roots / Q000033:anatomy & histology / Q000187:drug effects* / Q000382:microbiology; D012987:Soil / Q000032:analysis
D005308:Fertilizers; D012987:Soil; D009584:Nitrogen