| Variation of soil stable infiltration rate in growing season for rehabilitated grassland in loess hilly region |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2017.03.17 |
| Key Words: soil stable infiltration rate rehabilitated grassland seasonal variation soil properties loess hilly region |
| Author Name | Affiliation | | WANG Chang-yan | College of Geography and Environment, Baoji Arts & Sciences University, Baoji, Shaanxi 721013, China
Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province, Baoji, Shaanxi 721013, China | | YU Yao-chuang | College of Geography and Environment, Baoji Arts & Sciences University, Baoji, Shaanxi 721013, China
Key Laboratory of Disaster Monitoring and Mechanism Simulating of Shaanxi Province, Baoji, Shaanxi 721013, China |
|
| Hits: 1098 |
| Download times: 516 |
| Abstract: |
| Using two rings method, the seasonal variation of soil stable infiltration rate in growing season for rehabilitated grassland in loess hilly region was discussed. The results were indicated that: (1) The soil stable infiltration rate of Leymus secalinus was presented the significant seasonal change trend as “W” type (P＜0.05) in the growing season, but the soil stable infiltration rate of alfalfa was presented no obvious seasonal variation (P>0.05). During the grass growing season, the change range of soil stable infiltration rate of Leymus secalinus was from 1.61 mm·min-1 to 4.53 mm·min-1, the average value of was 2.89 mm·min-1. The minimum value of soil stable infiltration rate of Leymus secalinus was appeared in earing stage, the maximum value of 4.53 mm·min-1 was appeared in seed maturing stage. The soil stable infiltration rate of alfalfa was from 2.12 mm·min-1 to 2.3 mm·min-1, the average value was 2.23 mm·min-1. The minimum value of soil stable infiltration rate of alfalfa was appeared in early seeds maturing stage, the maximum value of 2.3 mm·min-1 was appeared in side branch forming stage, flowering stage and seeds mature stage. (2) The soil stable infiltration rate of Leymus secalinus and bare land was possessed significant difference (P＜0.05), but for the alfalfa and bare land was no significant difference (P＜0.05). The average soil stable infiltration rate of Leymus secalinus was the maximum (2.89±1.03 mm·min-1), the secondly was the alfalfa grassland (2.23±0.09 mm·min-1). (3) The variation of soil attributes as soil bulk density, total porosity and capillary porosity etc. were the main factors to influence the change of soil stable infiltration rate in growing season for rehabilitated grassland in losses hilly seasonal region. (4) Using the parameters of bulk density, total porosity and capillary porosity etc. could be well simulated the change of soil stable infiltration rate in the growing season for rehabilitated grassland in losses hilly region (R2＞0.86, NSE＞0.86). |
|
|
|