A long-term effect of Larix monocultures on soil physicochemical properties and microbes in northeast ChinaAuthor(s): Jie Zhang; Jianwei Zhang; Lixue Yang
Source: European Journal of Soil Biology
Publication Series: Scientific Journal (JRNL)
Station: Pacific Southwest Research Station
Download Publication (1.0 MB)
Forest monocultures are generally considered to alter the microbial community, reduce soil fertility, and presumably reduce forest productivity compared to mixed species in plantations or mixed species in natural stands. As the mechanisms of alteration of soils by monocultures have not been elucidated very well, we compared indicators of stand productivity and soils in three forest types all growing on the same soils that developed under the natural forests of the Maoershan Forest Farm in northeastern China. The three forest types were a planted monoculture of Larix plantation but where other species were allowed to ingrow (LP), a mixed species natural stand (NS), and a mixed species stand created by planting Larix seedlings into a natural stand (LP_NS). We measured the vegetation response as aboveground biomass (AGB), species richness and diversity, the soil response as soil physicochemical properties, and microbial community response as phospholipid fatty acids (PLFAs). The objectives were to determine (1) if the productivity of the Larix plantation was reduced relative to the natural stand, and if so, (2) which soil or microbial community factors were related to the declining productivity, and (3) how vegetation characteristics, soil physicochemical properties, and microbial community interacted. The three forest types appeared similar in aboveground biomass and litter biomass. As expected, 83% of 178.3 Mg ha−1 overstory AGB in LP was conifers and 87% of 134.7 Mg ha−1 AGB in NS was broadleaved species, and LP_NS with 176.9 Mg ha−1 had similar conifer AGB (53%) and broadleaved AGB (47%). Species richness for understory was greater in LP (N0 = 34, P < 0.05) than in NS (N0 = 22) and in LP_NS (N0 = 19); but species diversity was not different among the three forest types (2.1 ≤ H’≤ 2.7, P > 0.09). LP showed significant reductions (P < 0.006) in measures of soil fertility as lower soil N and P concentrations, lower soil pH, and higher soil bulk density than NS and LP_NS. Microbial PLFA did not differ among the three stands (P > 0.11) except for the ratios of G+/G-, sat/mono, and cy/prec PLFAs (P < 0.03). Our findings indicate that the plantation of Larix where ingrowth of other species occurred did not show declines in overstory productivity. However, AGB and litter biomass shifts from broadleaved species to conifers in LP relative to NS and LP_NS caused some soil changes that may relate to long-term productivity losses.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationZhang, Jie; Zhang, Jianwei; Yang, Lixue. 2020. A long-term effect of Larix monocultures on soil physicochemical properties and microbes in northeast China. European Journal of Soil Biology. 96: 103149. https://doi.org/10.1016/j.ejsobi.2019.103149.
KeywordsLarix gmelinii plantation, Phospholipid fatty acids, Soil fertility, Soil microbial communities, Temperate deciduous secondary forests
- Biomass Production of 12-Year-Old Intensively Cultured Larix Eurolepis
- Larix P. Mill.: larch
- Screening larch in vitro for resistance to Mycosphaerella laricina
XML: View XML