| 耕地植被人为干扰格局动态变化特征及其尺度效应 |
| |
| 引用本文： | 林佳,宋戈,张莹.耕地植被人为干扰格局动态变化特征及其尺度效应[J].农业工程学报,2019,35(9):275-284. |
| |
| 作者姓名： | 林佳 宋戈 张莹 |
| |
| 作者单位： | 东北大学文法学院土地管理研究所，沈阳 110169,东北大学文法学院土地管理研究所，沈阳 110169,东北大学文法学院土地管理研究所，沈阳 110169 |
| |
| 基金项目： | 国家自然科学基金项目（批准号：41071346；41571165） |
| |
| 摘 要： | 为探究耕地植被人为干扰格局动态变化特征及其尺度效应,该研究以黑龙江省大庆市为研究区,通过遥感与地理信息系统相结合的方法计算和识别耕地植被人为干扰,分析5个时段(1990-1995年、1995-2000年、2000-2005年、2005-2010年和2010-2016年)耕地植被人为干扰格局动态变化特征;并采用滑动格窗法和ISODATA聚类算法,对耕地植被人为干扰格局的尺度效应进行了研究。结果表明:1)当耕地植被受到的人为干扰增多时,研究区耕地植被人为干扰的分布趋向于集中;反之则趋向于分散。2)研究期内占耕地植被人为干扰面积50%以上的地区的尺度效应并不明显,但仍有占面积11.81%～18.33%的地区人为干扰的尺度效应十分显著,这些地区是人为干扰分布最集中和最不均匀的地区。3)在耕地植被人为干扰尺度效应显著地区中,土地利用类型未发生变化的地区所占的面积比例呈上升趋势,说明耕地保护政策产生了较好的效果;但耕地植被人为干扰的主要来源是农业生产行为,应将未来政策关注的重点转为对耕地土壤理化性质稳定性的维护。4)从多尺度空间聚类类型可以看出,在大部分尺度效应显著地区,尺度越小耕地植被人为干扰越显著,说明发展适度规模农业是降低人为干扰、提高粮食产量的有效途径。研究对于实现耕地保护和粮食稳定生产具有重要意义。
|
| 关 键 词： | 遥感 植被 耕地 人为干扰 干扰格局 尺度效应 大庆市 |
| 收稿时间： | 2018/9/12 0:00:00 |
| 修稿时间： | 2019/4/11 0:00:00 |
Dynamic change characteristic of cultivated land vegetation human disturbance patterns and its scale effects |
| |
| Lin Ji,Song Ge and Zhang Ying.Dynamic change characteristic of cultivated land vegetation human disturbance patterns and its scale effects[J].Transactions of the Chinese Society of Agricultural Engineering,2019,35(9):275-284. |
| |
| Authors: | Lin Ji Song Ge and Zhang Ying |
| |
| Institution: | Institute of Land Management, School of Humanities and Law, Northeast University, Shenyang 110169, China,Institute of Land Management, School of Humanities and Law, Northeast University, Shenyang 110169, China and Institute of Land Management, School of Humanities and Law, Northeast University, Shenyang 110169, China |
| |
| Abstract: | The characteristics of human disturbance pattern changes of cultivated land vegetation is the spatial expression of the disturbance to changes of cultivated land vegetation under the interaction of human activities and natural conditions of cultivated land. It is an important basis to diagnose the influence of human utilization behavior on the stable crops production that mastering the dynamic characteristics of human disturbance pattern change of cultivated land vegetation on different scales. In order to explore the multi-scale dynamic characteristics of human disturbance patterns change of cultivated land vegetation, this study took Daqing, Heilongjiang Province as the research area, calculated and identified dynamic characteristics of human disturbance patterns change of cultivated land vegetation in five periods (1990-1995, 1995-2000, 2000-2005, 2005-2010 and 2010-2016) by using methods of remote sense (RS) and geographical information system (GIS). Scale effects of human disturbance patterns of cultivated land vegetation was analyzed by using methods of sliding lattice and iterative self-organizing data analysis techniques algorithm (ISODAT Algorithm). The results showed that the distribution of human disturbance of cultivated land vegetation in the research area tended to be concentrated when the human disturbance of cultivated land vegetation increased, and on the contrary tended to be dispersed. There were two main reasons for the formation of human disturbance pattern of cultivated land vegetation, one reason was that agricultural planting behavior led to the fluctuation of the physical and chemical properties of soil, which led to the change of crops prosperity. The other was that the conversion between cultivated land and other land use types, which led to the fundamental change of cultivated land vegetation. We also found that in the study period, the scale effect of human disturbance of cultivated land vegetation was not obvious in the areas that accounted for more than 50%.However, the scale effect of human disturbance of cultivated land vegetation was still obvious in the areas that accounted for 11.81% to 18.33%, these areas were the most concentrated and uneven distribution of human disturbance. Concentration of human disturbance changed the environment, vegetation and influence between the neighboring vegetation dependencies, destabilized the cultivated land vegetation habitat, therefore, in the regions where the scale effect of human disturbance was obvious, the effect of human disturbance on vegetation community habitat was significantly greater than that of other regions. In addition in the areas where the scale effect of human disturbance of cultivated land vegetation was obvious, the proportion of the area where land use type had not changed showed an increasing trend, it showed that the policy of cultivated land protection had a good effect. But agricultural production behavior was the main source of human disturbance of cultivated land vegetation. So the focus of future policy should be shifted to maintaining the stability of soil physical and chemical properties. Finally, it can be seen from the multi-scale spatial clustering types that in most regions with obvious scale effects, the smaller the scale, the more obvious the human disturbance of cultivated land vegetation. It showed that the development of moderate scale agriculture was an effective way to reduce human disturbance and improve grain yield. In this study, we proposed the theory and method which could realize the research on dynamics of cultivated land vegetation structure changes under human disturbance and rapidly monitoring of its scale effect. This research is of great significance for realizing the protection of cultivated land and stable grain production. |
| |
| Keywords: | remote sensing vegetation cultivated land human disturbance disturbance pattern scale effect Daqing City |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
| 点击此处可从《农业工程学报》下载免费的PDF全文 |
|
