Effects of water supply and sand burial on seed germination and seedling emergence of three sand-fixingArtemisiaplants in Horqin Sandy Land

2015 ◽  
Vol 35 (9) ◽  
Author(s):  
温都日呼 Wendurihu ◽  
王铁娟 WANG Tiejuan ◽  
张颖娟 ZHANG Yingjuan ◽  
吴芳芳 WU Fangfang
Keyword(s):  
Seed Germination ◽  
Water Supply ◽  
Seedling Emergence ◽  
Horqin Sandy Land ◽  
Sandy Land ◽  
Sand Burial

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.

Effects of Sand Burial and Water Regimes on Seed Germination and Seedling Emergence of Two Desert Species

2011 ◽  
Vol 356-360 ◽  
pp. 2465-2472
Author(s):  
Fei Peng ◽  
Wataru Tsuji ◽  
Tao Wang ◽  
Atsushi Tsunekawa
Keyword(s):  
Seed Germination ◽  
Water Supply ◽  
Water Regime ◽  
Field Experiments ◽  
Seedling Emergence ◽  
Burial Depth ◽  
Dune System ◽  
Sand Burial ◽  
Water Regimes ◽  
Simulated Precipitation

Reaumuria songarica (Pall.) Maxim and Nitraria tangutorum Bobr. are two species growing on nebkhas in dune system. But N. tangutorum distributes more widely than R. songarica does. Sand burial and drought are two major disturbing factors in the field. Experiments were conducted under controlled conditions to investigate sand burial depth and simulated precipitation amount on seed germination, seedling emergence and seedling mass of the two shrubs to explain the dominance of N. tangutorum over R. songarica. Seeds were buried at 6 depths (0, 0.5, 1.5, 3, 5, 8 cm) and irrigated with 3 water regimes (5, 7, 10 mm) in plastic pots (8 cm in diameter and 11 cm in height) under the same light intensity and alternating temperature in an environment controlled growth chamber. R. songarica has a greater germination percentage than N. tangutorum under each burial depth with any water regime. R songarica seed germination increased with burial depth at each water regime and when depth is deeper than 1.5 cm all the seeds germinated under 7 and 10 mm water treatment. N. tangutorum seed germination increased until an optimal burial depth and then decreased. The optimal burial depth shifts with water regime. Seedling emergence of R songarica did not occur at depth deeper than 1.5 cm under any water regime. N. tangutorum seedling emergence maximized at 3, 1.5 and 0.5 cm with 5, 7 and 10 mm water supply regime respectively. Under all the treatments, N. tangutorum seedlings had larger dry mass than R. songarica seedlings. Higher N. tangutorum seedling emergence percentage and seedling mass with given water supply enhance its possibility to appear on nebkhas in the study area.

scholarly journals Effects of Sand Burial Depth on Xanthium Spinosum Seed Germination and Seedling Growth

2021 ◽  
Author(s):  
yuanyuan Tao ◽  
Tian-cui Sang ◽  
Jun-jie Yan ◽  
Yun-xia Hu ◽  
Yu Zhao ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seedling Growth ◽  
Seedling Emergence ◽  
Soil Layer ◽  
Burial Depth ◽  
Seedling Height ◽  
Emergence Time ◽  
Deep Soil ◽  
Sand Burial ◽  
Emergence Rate

Abstract different sand burial depths on seed germination, seedling emergence, growth and biomass allocation were studied to provide a scientific basis for further control of X. spinosum. Six sand burial depths (1, 2, 3, 5, 7 and 9 cm) were established to explore the response of X. spinosum seed germination and seedling growth to sand burial. The first emergence time, peak emergence time, emergence rate, seedling growth height, biomass and biomass distribution of X. spinosum seeds had significant effects at different sand burial depths (P < 0.05). The X. spinosum seeds had the highest emergence rate (71.5%) at 1 cm sand burial and the maximum seedling height (7.1 cm). As sand burial depth increased, the emergence rate and seedling height gradually decreased, and the emergence rate (12.25%) and seedling height (2.9 cm) were lowest at 9 cm sand burial. The root length at 9 cm depth (13.6 cm) was significantly higher than that at other sand depths (P < 0.05). The sand burial depth affected the biomass accumulation and distribution of X. spinosum. As sand burial depth increased, the root biomass and rhizome ratio increased, and the most deeply buried seedlings allocated more biomass for root growth. The optimal sand burial depth for seed germination and seedling growth of X. spinosum was 1–3 cm, and high burial depth (5–9 cm) was not conducive to the germination and growth of X. spinosum seedlings. For prevention and control of X. spinosum, we suggest deeply ploughing crops before sowing to ensure X. spinosum seeds are ploughed into a deep soil layer.

Effects of sand burial and seed size on seed germination, seedling emergence and growth ofCaragana korshinskiiKom. (Fabaceae)

2012 ◽  
Vol 32 (24) ◽  
pp. 7757-7763 ◽  
Author(s):  
杨慧玲 YANG Huiling ◽  
梁振雷 LIANG Zhenlei ◽  
朱选伟 ZHU Xuanwei ◽  
梅世秀 MEI Shixiu ◽  
王会勤 WANG Huiqin ◽  
...  
Keyword(s):  
Seed Germination ◽  
Seed Size ◽  
Seedling Emergence ◽  
Sand Burial

Effects of sand burial on seed germination, seedling emergence, survival, and growth of Agropyron psammophilum

1990 ◽  
Vol 68 (2) ◽  
pp. 304-310 ◽  
Author(s):  
Jianhua Zhang ◽  
M. A. Maun
Keyword(s):  
Seed Germination ◽  
Negative Correlation ◽  
Seedling Emergence ◽  
Dry Weight ◽  
Burial Depth ◽  
Sand Burial ◽  
Buried Seeds ◽  
Percent Germination ◽  
Survival And Growth ◽  
The Mean

Studies were conducted to determine the effects of sand burial on seed germination, seedling emergence, survival, and growth of Agropyron psammophilum. In the field, seedlings of A. psammophilum emerged from burial depths ranging from 0 to 7 cm. The mean depth of seedling emergence was 2.96 ± 1.06 (mean ± SD) cm, with more than 80% individuals emerging from 0 to 4 cm depths of sand burial. In a greenhouse, seeds of A. psammophilum were artificially buried by sand to depths of 0, 2, 4, 8, 10, and 12 cm. Higher emergence percentages were obtained at 2 and 4 cm burial depths and no seedling emerged from depths greater than 8 cm. The percent germination of buried seeds, percent emergence, and emergence rte of seedlings showed negative correlation with burial depth. Burial of young seedlings up to a depth of 6 cm stimulated their growth in height, leaf and tiller production, and overall dry weight. When the burial depth exceeded 6 cm, some seedlings died and if seedlings were buried to 100% of their height (11 cm for 1-week-old and 22 cm for 2-week-old seedlings), all seedlings died.

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