Mongolian pine is an important afforestation species widely used for ecological management in northeast China. The environment in this region is very unstable and the flora are regularly subjected to drought stress.Th...Mongolian pine is an important afforestation species widely used for ecological management in northeast China. The environment in this region is very unstable and the flora are regularly subjected to drought stress.This paper reports on the influence of inoculation with the Suillus luteus on seedlings under different water conditions.Both inoculated and non-inoculated ectomycorrhizal fungi(ECMF)-S. luteus seedlings were maintained under wellwatered or water-stress conditions for 3 months. The S.luteus colonization rate under water stress was higher than that in well-watered conditions. Under water stress, inoculated seedlings had greater growth than non-inoculated seedlings. In addition, under water stress, S. luteus-inoculated seedlings had greater superoxide dismutase and peroxidase activity, higher soluble protein content, lower proline content, and lower malondialdehyde content than non-inoculated seedlings. S. luteus colonization increased the rhizosphere soil-enzyme activity and the rhizosphere soil nutrition content under both well-watered and water-stress conditions. Given the positive impact on seedling growth and physiology, S. luteus shows potential for use in the arid and semi-arid regions of northeast China for afforestation.展开更多
The rootsystem structural characteristics of annual seedlings of Pinus koraiensis, Pinus sylvestris var. mongolica, Larix olgensis and Picea koraiensis were studied with the method of excavation at the nursery of Maoe...The rootsystem structural characteristics of annual seedlings of Pinus koraiensis, Pinus sylvestris var. mongolica, Larix olgensis and Picea koraiensis were studied with the method of excavation at the nursery of Maoershan Experimental station in the Antumn of 1992. The results showed that there were large differences in some ways, such as their root quantities,distributive depth and dense layers of root systems,etc.展开更多
This paper summarizes the result from the provenance test of eight years old Pinus sylvestris var. mongolica in Liangshui Natural Rcserve comprehensivcly. The main contents include:(1) the geographic variation of the ...This paper summarizes the result from the provenance test of eight years old Pinus sylvestris var. mongolica in Liangshui Natural Rcserve comprehensivcly. The main contents include:(1) the geographic variation of the growth characters of Pinus sylvestris var.mongolica.tends to negative change gradually at latitude and has obvious climatic nature, (2) no significant difference exists in the morphological adaptability and resistant characteristics and so on; (3)on the basis of the geographic variation study on the growth characteristics, the provcnances of Pinus sylvestris var. mongolica were classificd into two geographic populations and two subpopulations as follows:the northern population of the Daxing'an Mountain (Ⅰ) and the southern population of the Daxing'an Mountain as wcll as the Xiaoxinglan Mountain (Ⅱ),which includcs Honghuarii subpopulation and Kalunshan subpopulation (Ⅱ-2). (4) the height growth rhythm was analyzed according to the divided population and subpopuIation; (5) the best provcnance was selected for the Liangshui Natural Rescrve and its neighborhood accord ing to the results from SSR test of the growth characteristics (the breast height diameter and height of eight year old trces), the possibility of the carly provcnance sclection was also verified by the method of order correlation analysis on the height growth of three. five, scvcn and eight years old provenances.展开更多
基金supported by the National Natural Science Foundation of China(31670649,31200484,31170597)
文摘Mongolian pine is an important afforestation species widely used for ecological management in northeast China. The environment in this region is very unstable and the flora are regularly subjected to drought stress.This paper reports on the influence of inoculation with the Suillus luteus on seedlings under different water conditions.Both inoculated and non-inoculated ectomycorrhizal fungi(ECMF)-S. luteus seedlings were maintained under wellwatered or water-stress conditions for 3 months. The S.luteus colonization rate under water stress was higher than that in well-watered conditions. Under water stress, inoculated seedlings had greater growth than non-inoculated seedlings. In addition, under water stress, S. luteus-inoculated seedlings had greater superoxide dismutase and peroxidase activity, higher soluble protein content, lower proline content, and lower malondialdehyde content than non-inoculated seedlings. S. luteus colonization increased the rhizosphere soil-enzyme activity and the rhizosphere soil nutrition content under both well-watered and water-stress conditions. Given the positive impact on seedling growth and physiology, S. luteus shows potential for use in the arid and semi-arid regions of northeast China for afforestation.
文摘The rootsystem structural characteristics of annual seedlings of Pinus koraiensis, Pinus sylvestris var. mongolica, Larix olgensis and Picea koraiensis were studied with the method of excavation at the nursery of Maoershan Experimental station in the Antumn of 1992. The results showed that there were large differences in some ways, such as their root quantities,distributive depth and dense layers of root systems,etc.
文摘This paper summarizes the result from the provenance test of eight years old Pinus sylvestris var. mongolica in Liangshui Natural Rcserve comprehensivcly. The main contents include:(1) the geographic variation of the growth characters of Pinus sylvestris var.mongolica.tends to negative change gradually at latitude and has obvious climatic nature, (2) no significant difference exists in the morphological adaptability and resistant characteristics and so on; (3)on the basis of the geographic variation study on the growth characteristics, the provcnances of Pinus sylvestris var. mongolica were classificd into two geographic populations and two subpopulations as follows:the northern population of the Daxing'an Mountain (Ⅰ) and the southern population of the Daxing'an Mountain as wcll as the Xiaoxinglan Mountain (Ⅱ),which includcs Honghuarii subpopulation and Kalunshan subpopulation (Ⅱ-2). (4) the height growth rhythm was analyzed according to the divided population and subpopuIation; (5) the best provcnance was selected for the Liangshui Natural Rescrve and its neighborhood accord ing to the results from SSR test of the growth characteristics (the breast height diameter and height of eight year old trces), the possibility of the carly provcnance sclection was also verified by the method of order correlation analysis on the height growth of three. five, scvcn and eight years old provenances.
