Population structure and dynamic characteristic of Ulmus pumila sparse forest in sandy land, China

2011 ◽  
Author(s):  
Lei Zhang ◽  
Xiaojiang Wang ◽  
Li Zhao ◽  
Hailiang Niu
Keyword(s):  
Population Structure ◽  
Dynamic Characteristic ◽  
Sandy Land ◽  
Ulmus Pumila

scholarly journals Experimental sand burial affects seedling survivorship, morphological traits, and biomass allocation of <i>Ulmus pumila</i> var. <i>sabulosa</i> in the Horqin Sandy Land, China

Solid Earth ◽  
2016 ◽  
Vol 7 (4) ◽  
pp. 1085-1094 ◽  
Author(s):  
Jiao Tang ◽  
Carlos Alberto Busso ◽  
Deming Jiang ◽  
Ala Musa ◽  
Dafu Wu ◽  
...  
Keyword(s):  
Biomass Allocation ◽  
Morphological Traits ◽  
Seedling Emergence ◽  
Relative Mass ◽  
Seedling Height ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Ulmus Pumila ◽  
Sand Burial ◽  
Seedling Survivorship

Abstract. As a native tree species, Ulmus pumila var. sabulosa (sandy elm) is widely distributed in the Horqin Sandy Land, China. However, seedlings of this species have to withstand various depths of sand burial after emergence because of increasing soil degradation, which is mainly caused by overgrazing, climate change, and wind erosion. An experiment was conducted to evaluate the changes in its survivorship, morphological traits, and biomass allocation when seedlings were buried at different burial depths: unburied controls and seedlings buried vertically up to 33, 67, 100, or 133 % of their initial mean seedling height. The results showed that partial sand burial treatments (i.e., less than 67 % burial) did not reduce seedling survivorship, which still reached 100 %. However, seedling mortality increased when sand burial was equal to or greater than 100 %. In comparison with the control treatment, seedling height and stem diameter increased at least by 6 and 14 % with partial burial, respectively. In the meantime, seedling taproot length, total biomass, and relative mass growth rates were at least enhanced by 10, 15.6, and 27.6 %, respectively, with the partial sand burial treatment. Furthermore, sand burial decreased total leaf area and changed biomass allocation in seedlings, partitioning more biomass to aboveground organs (e.g., leaves) and less to belowground parts (roots). Complete sand burial after seedling emergence inhibited its re-emergence and growth, even leading to death. Our findings indicated that seedlings of sandy elm showed some resistance to partial sand burial and were adapted to sandy environments from an evolutionary perspective. The negative effect of excessive sand burial after seedling emergence might help in understanding failures in recruitments of sparse elm in the study region.

scholarly journals Experimental sand burial affects seedling survivorship, morphological traits and biomass allocation of <i>Ulmus pumila var. sabulosa</i> in Horqin Sandy Land

2016 ◽  
Author(s):  
Jiao Tang ◽  
Carlos Alberto Busso ◽  
Deming Jiang ◽  
Ala Musa ◽  
Dafu Wu ◽  
...  
Keyword(s):  
Biomass Allocation ◽  
Morphological Traits ◽  
Seedling Emergence ◽  
Seedling Height ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Seedling Mortality ◽  
Ulmus Pumila ◽  
Sand Burial ◽  
Seedling Survivorship

Abstract. As a native tree species, Ulmus pumila var. sabulosa (Sandy elm) is widely distributed in Horqin Sandy Land. However, seedlings of this species have to withstand various depths of sand burial after emergence because of increasing soil degradation. So an experiment was conducted to evaluate the changes in the survivorship, morphological traits and biomass allocation buried with different burial depths (unburied, and seedlings buried vertically up to 33, 67, 100 or 133 % of the initial mean seedling height). The results showed that partial sand burial treatments (i.e., less than 67 % burial) did not influence seedling survivorship, which still reached 100 %. However, seedling mortality increased as sand burial was equal to or greater than 100 %. Seedling height and stem diameter increased at least by 6 to 14 % with partial burial in comparison with control treatment. Whilst seeding taproot length, total biomass, and relative growth rates at least enhanced by 10 %, 15.6 %, and 27.6 %, respectively, with the partial sand burial treatment. Furthermore, sand burial decreased total leaf area and changed biomass allocation on seedlings, transferring more biomass to aboveground rather than belowground parts. Complete sand burial after seedling emergence inhibited its growth, and even lead to death. Our findings indicated that seedling of sandy elm had a certain resistance to partial sand burial and acclimated to sandy environments. The negative effects of common excessive sand burial after seedling emergence help to understand failures in recruitment of sparse elm woodland in the Horqin sandy land.

Changes in water use with growth in Ulmus pumila in semiarid sandy land of northern China

Trees ◽  
2013 ◽  
Vol 28 (1) ◽  
pp. 41-52 ◽  
Author(s):  
Hua Su ◽  
Yonggeng Li ◽  
Wei Liu ◽  
Hong Xu ◽  
Osbert Jianxin Sun
Keyword(s):  
Water Use ◽  
Northern China ◽  
Sandy Land ◽  
Ulmus Pumila

scholarly journals Seed Burial Depth and Soil Water Content Affect Seedling Emergence and Growth of Ulmus pumila var. sabulosa in the Horqin Sandy Land

2016 ◽  
Vol 8 (1) ◽  
pp. 68 ◽  
Author(s):  
Jiao Tang ◽  
Carlos Busso ◽  
Deming Jiang ◽  
Yongcui Wang ◽  
Dafu Wu ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Seedling Emergence ◽  
Burial Depth ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Ulmus Pumila ◽  
Seed Burial

Effects of grazing management on the degradation of Ulmus Pumila open forest in Otindag Sandy Land

2020 ◽  
Vol 40 (5) ◽  
Author(s):  
姚雪玲 YAO Xueling ◽  
李龙 LI Long ◽  
王锋 WANG Feng ◽  
刘书润 LIU Shurun ◽  
吴波 WU Bo ◽  
...  
Keyword(s):  
Grazing Management ◽  
Sandy Land ◽  
Ulmus Pumila ◽  
Open Forest ◽  
Otindag Sandy Land
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