Investigation on the variables Influencing the flowering process of siberian larch trees
Azzaya Batkhuyag1, Udval Bayrsaikhan2* Anudari Batbileg3
* Corresponding Author: Udval Bayrsaikhan
1,2,3 Division of Forest Resources and Forest Protection, Institute of Geography and Geoecology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia
Digital Object Identifier:
https://doi.org/10.53468/mifyr.2023.03.02.23
Abstract – Ulaanbaatar, the largest city in Mongolia, spans an area of 4,704.4 km2 and boasts a population of around 1.7 million residents. As for Mongolia over the past eighty decades, the average annual temperature has increased by 2.2 degrees, and the amount of precipitation has decreased by 7 10 percent every year. The forest in the green area of Ulaanbaatar city serves multiple purposes, including shielding central settlements from harsh weather conditions, mitigating urban noise pollution, decreasing air pollution levels, and providing a pleasant environment for residents to unwind and explore. The purpose of this study is to determine the factors impacting the flowering of larch forests in the green zone of Ulaanbaatar and to study the effects of climate change on the conditions of the region. As a result, the trees in the sample area are in the age class IV-VII of the mixed taiga forest in mature states with larch, spruce, and cedar with a thickness of 0.6-0.7. The average diameter of the forest is 22.5–30.2 cm, the average height is 18.6–18.8 m, and according to the selection category, normal trees are prevalent. According to the flowering process, the trees began to bloom evenly in the second ten days of May, but due to sudden coldness in spring and continuous cold rain, the larch flowers dried up and could no longer produce seeds. Soil has the most important influence on the flowering, fruiting, seed yield, and seed maturation of trees, shrubs, and plants. According to the results of soil analysis, the content of humus contained in 100 g of soil is sufficient, the soil solution medium has an average pH of 5.8, or the reaction medium is generally neutral, carbonate content is not detected in all layers of the soil, electrical conductivity is low to moderate, mobile phosphorus and potassium supply thus mechanical components are good. The uppermost surface layers are sandy soil and below that are light clay and clay with particle composition.
Keywords: Larch, seed, Crop, Stand, Green zone, Climate Change, Flower
Article History: Received 20 March 2023, Received in revised form 23 March 2023, Accepted 18 June 2023