EFFECTS OF WATER SUPPLY AND SAND BURIAL ON SEED GERMINATION AND SEEDLING EMERGENCE OF FOUR DOMINANT PSAMMOPHYTES IN THE ORDOS PLATEAU

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.

Download Full-text

Effect of sand burial depth on seed germination and seedling emergence of Calligonum L. species

Journal of Arid Environments ◽

10.1006/jare.2001.0979 ◽

2002 ◽

Vol 51 (4) ◽

pp. 603-611 ◽

Cited By ~ 4

Author(s):

Jun Ren ◽

Ling Tao ◽

Xin-Min Liu

Keyword(s):

Seed Germination ◽

Seedling Emergence ◽

Burial Depth ◽

Sand Burial

Download Full-text

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

10.21203/rs.3.rs-871392/v1 ◽

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.

Download Full-text

Effect of sand burial depth on seed germination and seedling emergence of Calligonum L. species

Journal of Arid Environments ◽

10.1016/s0140-1963(01)90979-6 ◽

2002 ◽

Vol 51 (4) ◽

pp. 603-611 ◽

Cited By ~ 41

Author(s):

J Ren

Keyword(s):

Seed Germination ◽

Seedling Emergence ◽

Burial Depth ◽

Sand Burial

Download Full-text

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

Acta Ecologica Sinica ◽

10.5846/stxb201201170105 ◽

2012 ◽

Vol 32 (24) ◽

pp. 7757-7763 ◽

Cited By ~ 1

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

Download Full-text

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

Canadian Journal of Botany ◽

10.1139/b90-041 ◽

1990 ◽

Vol 68 (2) ◽

pp. 304-310 ◽

Cited By ~ 78

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.

Download Full-text