High Nitrogen Fertilizer

Previous research has shown that high nitrogen fertilizer could affect the development and change of fiber anatomy and secondary xylem. Because deposit called G additional layers, the resulting tension wood wood and have some similarities, it is thicker than the ordinary wood cell wall. This report compares the short-term effects of high nitrogen and trees tilt, induced tension wood, in the form of single or combined in poplar (Torr. & Gray) x p. deltoides Bartr aspling formed in the wood. Marsh in the newly formed secondary xylem inspection before fiber anatomy, chemical composition and transcription spectrum. Each processing lead to relative to the reference cell walls thicker. Based on Fourier transform infrared analysis, high nitrogen and tree has important effects on chemical composition, specific suggests that relative to the content of lignin, the secondary cell wall composed of cellulose and hemicellulose to transfer. High nitrogen trees, by contrast, short fiber, while the tilted trees have long fiber. Micro in 28 days after treatment

Wood form in secondary xylem of consecutive season, this is by genotype and environment conditions adjust development (Mellerowicz et al, 2001). Once harvested, wood can be used for many purposes, including construction timber and pulp and paper products. In addition, it may be a biological production of renewable biomass is an important source of (see Karp and shields 2008) for review. So far the secondary walls of xylem properties and can enhance the growth and development of wood formation and biochemical process of a number of studies have used aspen was carried out. (Jansson and Douglas, 2007), including adjust the check of precipitation of molecular events of cellulose, hemicellulose chitosan (matrix) and lignin (Tuskan et al., 2006, Mellerowicz and Sundberg 2008). More and more to increase the productivity of forest cultivation ways, nitrogen is used to achieve this goal is one of the most widely used method of afforestation (Macdonald and Hubert, 2002). Nitrogen is usually limited to land in the environment

Wood formation with high response to environmental change (Mellerowicz et al., 2001, Mellerowicz and Sundberg, 2008). Of anatomy and the level of change is often described as N – P – K fertilization, water stress and mechanical stimulation (Peszlen, 1994). In general, increasing growth rates have been found young wood relative to the more ideal mature wood ratio (see Macdonald and Hubert 2002). In Yang Shuzhong, have suggested that nitrogen by lowering its density, change the way of cell wall thickness and the genotype dependency affect fiber length to wood properties (Luo et al. 2005). Luo et al. (2005), according to the high nitrogen availability increases the poplars and aspergillus Niger l. fiber length, but reduces the arbutus Bartr fiber length. Former swamp by p. nigra l. using controlled growth conditions, we observed before, compared with low N tree, with high N the trees produce slightly short wide fiber, significantly thicker cell wall; During the period of 28 days of treatment

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