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Northwest A&F University (2020)

The Soil Water and Carbon Sequestration of Pinus Sylvestris Forest in Different Afforestation Ages in Mu Us Desert

杨雯锦;

Titre : The Soil Water and Carbon Sequestration of Pinus Sylvestris Forest in Different Afforestation Ages in Mu Us Desert

Auteur : 杨雯锦;

Grade : Master’s Theses 2020

Université : Northwest A&F University

Résumé partiel
Desertification is one of the serious ecological problems in semiarid areas.Vegetation construction is an important tool for improving soil environment.Artificial forest planting generally increases soil carbon storage but its continuous growth is limiting by soil water content.Exploring the variation of water and carbon pools at chronosequences of artificial forest ecosystem in the semiarid sandy land contributes to further reveal the effects of vegetation on sandy soil conditions,which is of great significance to vegetation construction and sustainable development.This study was conducted in the Mu Us Desert.Pinus sylvestris with different afforestation ages(20-,30-,40-,50-,and 60-year-old)were selected,and the bare land was used as a control(referred as plantation age of 0).The combination of field survey and indoor analysis was used to explore the soil moisture(0-10 m),carbon stocks(arbor layer carbon pool,litter layer carbon pool,soil layer carbon pool)and carbon sequestration rate along different afforestation ages,and the relationship between soil moisture and soil carbon storage at 0-4 m soil layer was also analyzed.The main results were as follows :(1)The afforestation ages of P.sylvestris artificial forest significantly affect soil water content in semiarid sandy land.The 20-years forests mainly consumed soil water at the depth of 0-2 m soil profile,with the highest net soil water consumption of 172.29 mm.The 30-years and 40-years forests mainly consumed soil water at the depth of 0-4 m,with the highest net soil water consumption of 176.48 mm.The 50-60-years forests mainly consumed soil water of the deepest soil profile(0-10 m),and the highest net soil water consumption(330.71 mm)occurred on 8-10 m.

Mots clés : Mu Us desert; stand ages; soil water; carbon storage; carbon sequestration rate;

Présentation (CNKI)

Page publiée le 4 avril 2022