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| DOI：10.13522/j.cnki.ggps.2017.0380 |
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| Effects of Soil Repellency on Germination of Different Plant Seeds |
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TANG Dexiu, LI Yi, LIU Feng, WANG Yichen
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1.College of Water Conservancy and Architectural Engineering, Northwest A & F University, Yangling 712100, China; 2. Institute of Water-saving Agriculture in Arid Areas of China (IWSA), Northwest A & F University, Yangling 712100, China; 3. Key Laboratory of Agriculture, Ministry of Education, Northwest A & F University, Yangling 712100, China；4. Sichuan Water Resources and Hydroelectric Investigation & Design Institute, SWHI, Chengdu 610000, China
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| Abstract: |
| 【Objective】 Soil repellency affects the ability of soil to retain and conduct water, and the purpose of this paper is to study its impact on germination of different plant seeds. 【Method】 We examined seeds of 16 species in four types of plants. The soil hydrophobicity was characterized by the water drop penetration time (WDPT). Soils with WDPT of 7 s, 12 s and 16 s were tested, and the control was a hydrophilic soil. In the experiments, we measured the germination time and germination rate of the seeds. 【Result】①Soil repellency affected initiation of the germination of most seeds. Increasing soil repellency delayed the initiation of germination of seeds of flowers, arable crops and vegetables, but had negligible impact on germination of tree seeds. ②The average germination rate of seeds of vegetables, flowers, trees and crops in hydrophilic soil was 30.00% and 43.75%, 15.00% and 50.83% respectively, while in repellent soil, the germination rate of all seeds decreased as the WDPT increased. 【Conclusion】 Soil repellency affects germination of seeds of vegetables, flowers and crops more than the seeds of trees, especially the seeds of Chinese red pine and rape which are not sensitive to soil hydrophobicity. |
| Key words: soil water repellency; WDPT ; plant species; germination rate; initiation germination time |
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