| Cite this article: | 孙莉英,栗清亚,裴亮,等.赣南坡地果园水土保持示范区地形因子对土壤理化性质和植物种类的影响研究[J].灌溉排水学报,2020,(10):-. |
| SUN Li-ying,LI Qing-ya,PEI Liang,et al.赣南坡地果园水土保持示范区地形因子对土壤理化性质和植物种类的影响研究[J].灌溉排水学报,2020,(10):-. |
|
| |
|
|
| This article has been：Browse 2457Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of topographic factors on soil physical and chemical properties and plant species in hillslope orchard of soil and water conservation demonstration area in southern Jiangxi Province |
|
SUN Li-ying1, LI Qing-ya1, PEI Liang1, Wu Hui2, CHEN La-jiao3
|
|
1.Institute of Geographic Sciences and Natural Resources Research,CAS;2.Zhejiang Regional Collaborative Innovation Center for Smart Cities;3.Institute of Remote Sensing and Digital Earth
|
| Abstract: |
| Soil properties and vegetation are important factors affecting soil erosion. Taking hilly orchard in the red soil region of southern China as the research area, the impacts of topographic factors, such as slope gradient, slope direction and slope position, on soil physical and chemical properties and the number of plant species were studied. Soil sampling was carried out by five-point sampling method and vegetation survey was carried out by quadrat method. The results showed that: (1) The change trend of soil moisture content at different slope grades was 5-10° > 10-15° > 15-25° > 0-5°, and the lowest soil moisture content is 18.6% in 0-5o area. With the change of both slope gradient and direction, soil total nitrogen content (TN), total potassium (TK), total phosphorus (TP) and total organic carbon (TOC) showed no significant differences. There were no significant differences in TN, TK and soil moisture content at different slope positions. The contents of TP and TOC increased in lower slope positions. (2) there were 183 species of plants in the study area, and the number of plant species showed significant differences with slope gradient, slope direction and slope position. The variation trend of the number of plant species with slope gradient was 0-5° > 10-15° > 15-25° > 5-10°. With the change of slope direction, the number of plant species on the sunny slope was much higher than that on the shady slope. The change trend of the number of plant species was lower on the top slopes, with the order of middle slope> up slope > down slope. All these results demonstrated that the topographic factors have certain influences on the soil properties and plant species in the hilly area of the red soil region in south China. Therefore, the influence of topographic factors should be taken into full consideration in the careful development of orchards and the spatial allocation of water conservation measures in hilly red soil region of southern China, for the higher economic income and the comprehensive benefits of water conservation measures. |
| Key words: soil and water conservation;demonstration area; vegetation survey; soil sampling; slope; aspect |
|
|
|
|
|
|
