| This article has been：Browse 1692Times Download 2943Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2017.0443 |
|
| The Change in Soil Temperature in Response to Different Film Mulches in Semiarid Region of the Loess Plateau |
|
WU Xianzhong, ZHAO Jinmei, LI Yi , DONG Jianguo, WANG Youke
|
|
Department of Physics andhydraulicEngineering, Gansu Normal University for Nationalities, Hezuo 747000, China; Forestry Institute, Gansu Agricultural University, Lanzhou 730070, China; Research Center of Soil and Water Conservation and Ecological Environment, CAS＆ME, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling 712100, China
|
| Abstract: |
| 【Objective】 Mulch could lead to soil temperature rise, thereby affecting plant physiological development. This paper investigated soil temperature change in response to different mulches. 【Method】 Field experiments were conducted at Mizhi experimental station in Shaanxi Province, with the soil mulched by black film (BF) and white film (TF) respectively; the control was no mulch (CK). We measured soil temperature change in the experiments. 【Result】 ①Mulching considerably increase soil temperature, and the temperature in the raised-beds was almost the same under the two mulches. The maximum diurnal change in soil temperature was 3.74 ℃ and 3.15 ℃. ②respectively under TF and BF. Under TF, the 0~30 cm soil temperature fluctuated most considerably in winter and least in summer, while under BF it changed most significantly in autumn and least in spring. The temperature change in spring and winder under TF differed significantly from under BF (P<0.05), although the difference between CK and BF was insignificant. In summer and autumn, TF and BF significantly increased soil temperature compared to CK (P<0.05), whereas the difference between TF and BF was insignificant. ③Mulch mainly affected the soil temperature up to 45 m, and below 90 cm the temperature under all treatments was almost the same. Soil temperature in 0~45 cm fluctuated more significantly in TF than in BF, while below 45 cm the temperature in BF stabilized. 【Conclusion】 Soil temperature rose considerably under mulch. In terms of soil temperature, TF is more suitable for winter and spring, while BF works better for summer and autumn. |
| Key words: film mulch; annual cover; temperature; seasonal change; the loess plateau |
|
|
