| Dynamic of soil moisture in different artificial grass land in the arid hilly regions at Sichuan Province |
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| DOI：10.7606/j.issn.1000-7601.2018.02.11 |
| Key Words: soil moisture artificial grass land arid land Sichuan slope farm land |
| Author Name | Affiliation | | WANG Xue-chun | School of Life Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | WANG Meng-ran | School of Life Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | YANG Guo-tao | School of Life Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | WANG Hong-ni | College of Adult and Online Education, Southwest University of Science and Technology , Mianyang, Sichuan 621010, China |
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| Abstract: |
| It is vital to explore dynamic of soil moisture in artificial grass land. Clarifying the impacts of forage grass planting on soil moisture changing may provide efficient ways for the water management of rain fed grass land. Based on long term experiment, impacts of forage grass planted on soil moisture dynamic were analyzed. The results showed following. (1) Average available soil moisture in artificial grass land of ryegrass, chicory and alfalfa in depth of 0～100 cm soil was 88.8, 189.3 mm and 181.7 mm respectively. Monthly mean available soil moisture was relative lower from January to April and that was relative higher from June to September, and that gradually decreased from September to December. (2) Soil weight moisture increased from the first quarter to the third quarter in the same year and that decreased from the third quarter in the last year to the first quarter in the next year. The depleted soil moisture in deep soil by artificial grass in the quarter was recovered in the third quarter. (3) Rate of rainfall storage was the lowest (71%, 64% and 68%) from June to August and was the highest (93%、94% and 94%) from November to March next year in artificial grass land of ryegrass, chicory and alfalfa respectively. Soil moisture consumption rate was the highest (66%,70% and 72%) from August to October and was the lowest (41%, 42% and 44%) from November to March next year in above mentioned artificial grass land. (4) Chicory and alfalfa were better in fresh yield, alfalfa and chicory were better in hay yield, alfalfa and ryegrass were better in crud protein production, and alfalfa and chicory were better in digestible energy in the process of forage grass using at Mianyang. Soil moisture in the depth 0～100 cm could be recovered well during the third quarter and no permant dry soil layer occurred in artificial ryegrass, chicory and alfalfa land at hilly region, Mianyang, Sichuan. Reasonable irrigation would be benefit to improve forage yield from November to April next year and irrigation after grass harvest could promote sprout of grass especially. |
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