Study of Earth Temperature and Soil Moisture Variation in Ground Surface Layer under Different Mulching Treatments
| Autor: | Chen, I-Cheng, 陳奕誠 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 The purpose of this study was to find the suitable mulching for reclamation by micro-climatic properties and soil moisture variation nearby the ground surface layer after different mulching treatments. All the observation had performed in the Machiilus Zuihoensis woodland which was reclaimed by leveling operation and kept one times tree height from surrounding canopy, and located at Southeastern side of National Pingtung University of Science and Technology, and observational duration was since July 2011 to May 2012. There were five mulching materials: Panicum maximum(天竺草), Paederia foetida(雞屎藤), Macaranga tanarius(血桐), Dicranopteris dichotoma(芒萁) and Champereia manillana(山柚) had provided for experiment in eighteen small plots (1m×1m) and one blank plot, individually. The implemental treatments included as, three species of mulching materials; three cover depth in 1, 3 and 5 cm; plant residue with and without first bifurcation, were random completely set in each small plot. The meteorological station had set in the middle side of plot to measure air temperature, relative humidity, rainfall and global solar radiation. To set sensors in all small plots could measure the earth temperature with 0 and 5 cm depth, and soil moisture in 5 cm depth. The results could be summarized as follow. The surrounding taller vegetation would affect solar radiation and air temperature of the reclaimed land to be less than meteorological station with grass cover. The optimum depth of mulching for Panicum maximum, Paederia foetida, Macaranga tanarius, Dicranopteris dichotoma and Champereia manillana were 3.8, 4.2, 3.9, 4.4 and 3.9 cm in torrid weather, and Panicum maximum, Paederia foetida, Macaranga tanarius were 3.9, 3.6 and 4 cm in cold surge. All the mulching could decrease the variation of earth temperature whatever with or without branch. The desorption time of ground surface layer was closely correlated to rainfall in a positive increasing tendency. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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