Peculiar Influence of Nitrogen on the Daily Growth and Photosynthesis of Scots Pine in the Far North

Коновалов, В. Н.; Зарубина, Л. В.; Goreva, A. D.

doi:10.1088/1755-1315/263/1/012011

Cited by 1 publication

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Причиной слабого роста сосны в заболоченных сосняках стали нарушение у сосны нормальной работы корневой системы из-за анаэробиоза, вызываемого частым затоплением и низкой обеспеченностью почвы элементами минерального питания [1,3,9,[18][19][20]24], а также задержка снабжения растущих побегов и корней ассимилятами в результате блокирования выхода их из донорного листа и передвижения в транспортных путях [2,7,11,13,[21][22][23]. Такие указания имеются и в работе [25].…”

Section: результаты исследования и их обсуждениеunclassified

“…Захарина [5], средняя скорость роста у большинства высших растений составляет около 1,0 мм/ч. В сосняках лишайниковых Крайнего Севера сосна растет со скоростью 0,5-0,6 мм/ч, а под влиянием N 180 -со скоростью 1,04-1,20 мм/ч [10,21].…”

Section: результаты исследования и их обсуждениеunclassified

“…В условиях затопленных почв наряду с наблюдением за ростовой активностью особую научную и практическую значимость приобретает изучение у древесных растений суточных и сезонных ритмов физиологической деятельности. Рассмотрением данного вопроса занимался ряд отечественных и зарубежных ученых [8,10,21]. Однако по обширному северному региону сведений о характере влияния удобрений на ростовые процессы сосны, произрастающей на затопленной почве, в научной литературе нет.…”

Section: Introductionunclassified

See 2 more Smart Citations

Daily Pine Growth on Highmoor Peat Soil under the Influence of Fertilizers

Зарубина¹

2022

Lesnoy Zhurnal (Forestry Journal)

View full text Add to dashboard Cite

The research aims at identifying the effect of nitrogen on daily growth and intensity of physiological processes in pine trees. The research was carried out in 2017–2018 in the north taiga zone of the Arkhangelsk region. A 33-year-old shrub-sphagnum pine forest (64° 45ʹ N), formed of pine undergrowth after felling of a parent stand, served as an experimental object. It was found that in the North in the sphagnum forest site conditions, pine growth in height has a maximum rate in the evening (dusky) and night hours. The highest intensity of physiological processes in pine trees is observed in the daylight hours. As a result of increased photosynthesis, the tree receives the macronutrients necessary for normal growth. Unlike lichen pine forests, in which the roots are not affected by waterlogging, in excessively moistened shrub-sphagnum pine forests pine trees grow much slower and during the day have a less evident intensity of physiological processes than in lichen pine forests. The low growth rate and slow physiological processes of pine in shrub-sphagnum pine forest are due to the disturbance of its root system as a result of root anaerobiosis caused by flooding. Constant excessive soil humidity and, as a consequence, its reduced aeration, reduce the effective action of nitrogen on the growth of pine trees in these conditions, and at the same time inhibit the absorptive activity and synthetic processes of the roots. Nitrogen fertilizers applied to shrub-sphagnum pine forests have a generally positive effect on the growth and physiological processes of pine trees, but act much weaker than in dry lichen pine forests. Under the influence of the nitrogen dose N180 pine trees have a 30 % increase in daily growth in height, the intensity of photosynthesis increases significantly, and as a result of reduced water consumption for transpiration, the water regime is normalized and transpiration productivity increases. These positive changes in growth and metabolic processes, occurring under the influence of nitrogen fertilizers introduced into the stands, improve the functional activity of pine and increase (in the case of additional drainage) the productivity of excessively moistened shrub-sphagnum pine forests.

show abstract

Section: результаты исследования и их обсуждениеunclassified