Wood Microstructure of Pine Plantations with Different Initial Stocking Rate on Drained Peat Soil upon Fertilization and Herbicide Treatments
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2020, Vol 9, Issue 4
Abstract
To secure a steady operation of large wood processing enterprises in north-west of the Taiga zone, accelerated coniferous forest cultivation appears to be the most promising. Treatments with mineral fertilizers and herbicides create optimal conditions for stand growth and thus result in wood increment. Trunk wood qualities and, hence, the output of the most valuable trunk sections are contingent on the volume and anatomical structure of radial increment. This paper shows the effect of fertilization and herbicide treatments on the anatomical structure of wood in pine plantations of different stocking rates in drained peat soils. Variations of late wood share and density are directly associated with the changes in anatomical structure of wood. Fertilization of pine plantations with density of 4000 and 2000 trees/ha increased the number of early tracheid rows in the process of their growth. The application of fertilizers and herbicides in pine plantations stocked at 1000 trees/ha induced a gradual reduction in the number of early tracheid rows. A combined mineral fertilizer plus herbicide treatment enlarged the number of late tracheid rows in wood of the plantations stocked at various rates. The total number of tracheid rows per annual ring increased in the plantations stocked at a rate of 4000 and 2000 trees/ha. The reduction in total number of tracheid rows of plantations with 1000 trees/ha stocking rate is down to mineral fertilization combined with herbicide treatments. Fertilizer and herbicide treatment of the plantations with the initial density of 4000 trees/ha leads to the formation of thick-walled early and late tracheids. Application of fertilizers in pine plantations with 1000 and 2000 trees/ha stocking rates promote the formation of early and late tracheids of a larger diameter. Tracheids of a smaller diameter were formed in the plantations stocked at 4000 trees/ha. The overall impact of fertilizers and herbicides caused an increase of late tracheid size in the plantations with different stocking rates. Comparing the obtained data with the regulatory requirements of GOST 968–68 and the Laboratory of Raw Materials of the All-Union Scientific Research Institute of Pulp and Paper Industry, we have found that cultivation of pine plantations with various stocking rates on dried peat soils using fertilizers and herbicides can be aimed at producing pulpwood (1st and 2nd categories) and high-quality sawlogs.
Authors and Affiliations
Ya. A. Neronova
Keywords
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- EP ID EP688510
- DOI 10.37482/0536-1036-20204-68-76
- Views 252
- Downloads 0
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