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| 东北地区农田净初级生产力时空特征及其影响因素分析 | |
| 引用本文： | 朱锋,刘志明,王宗明,宋开山.东北地区农田净初级生产力时空特征及其影响因素分析[J].资源科学,2010,32(11):2079-2084. |
| 作者姓名： | 朱锋 刘志明 王宗明 宋开山 |
| 作者单位： | 1. 中国科学院水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验,杨凌712100;东北师范大学城市与环境科学学院,长春130024;中国科学院东北地理与农业生态研究所,长春130012 2. 东北师范大学城市与环境科学学院,长春,130024 3. 中国科学院水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验,杨凌712100;中国科学院东北地理与农业生态研究所,长春130012 4. 中国科学院东北地理与农业生态研究所,长春,130012 |
| 基金项目： | 黄土高原土壤侵蚀与旱地农业国家重点实验室基金；中国科学院知识创新工程重要方向项目（编号：KZCX2-YW-341）；国家自然科学基金项目（编号：40930527；40871187）；国家重点基础研究发展计划资助（编号：2009CB42110x；2009CB421103） |
| 摘 要： | 本文在GIS技术的支持下,利用2000年-2006年MODISNPP(净初级生产力)数据、气象数据和土地利用数据,在经过统计数据验证之后,将东北地区农田生产力划分为五级:高产、较高产、中产、较低产和低产。在此基础上,分析了东北地区农田生产力的空间分布特征与时间变化规律,并分析了气候因子和地形因子对农田生产力的影响。结果表明:东北地区农田以旱田为主,占总面积的89.8%,农田净初级生产力自西向东、自北向南逐渐增加;旱田年均NPP变化范围在(309.8~329.5)gC(/m2·a),水田年均NPP介于(323.5~341.7)gC(/m2·a)之间,二者的年际变化趋势一致;2000年-2006年,东北地区农田NPP均值由309.1gC(/m2·a)上升至331.4gC(/m2·a);旱田(水田)NPP与气象因子以及地形因子的相关分析结果表明:生长季降水与旱田(水田)NPP呈现显著正相关,相关系数分别为0.53和0.37;生长季气温与旱田(水田)NPP呈微弱负相关关系;由于东北地区农田多分布在平原区,地形因子(高程、坡度、坡向)对旱田(水田)NPP的影响不大。以上结果表明,降水是影响东北地区农田净初级生产力的最重要因素。 |
| 关 键 词： | 净初级生产力 NPP MODIS 东北地区 降水 |
| 收稿时间： | 3/8/2010 12:00:00 AM |
Temporal-Spatial Characteristics and Factors Influencing Crop NPP across Northeastern China |
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| ZHU Feng,LIU Zhiming,WANG Zongming and SONG Kaishan.Temporal-Spatial Characteristics and Factors Influencing Crop NPP across Northeastern China[J].Resources Science,2010,32(11):2079-2084. | |
| Authors: | ZHU Feng LIU Zhiming WANG Zongming and SONG Kaishan |
| Institution: | State Key Laboratory of Soil Erosion and Dryland Farming on Loss Plateau of Institute of Soil and Water Conservation,Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, China; School of Urban and Environmental Sciences of Northeast Normal University, Changchun 130024, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;School of Urban and Environmental Sciences of Northeast Normal University, Changchun 130024, China;State Key Laboratory of Soil Erosion and Dryland Farming on Loss Plateau of Institute of Soil and Water Conservation,Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, China;Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China;Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China |
| Abstract: | The farm productivity in northeastern China was conceptually divided into five classes in terms of Moderate Resolution Imaging Spectroradiometer (MODIS) net primary productivity (NPP) data products for the period 2000-2006, meteorological data, and land use data with the support of GIS technology, i.e., the highest production, higher production, middle production, lower production, and the lowest production. On the basis of this, the authors examined in detail the characteristics of spatial-temporal distribution of the NPP of the farmland across northeastern China during the period 2000-2006, and elaborated the effects of climate and topography on agricultural productivity. Results showed that the dry land over the study region accounted for roughly 89.8% of the total farmland area, and the area of paddy field took up around 20.2%. As far as the spatial distribution of NPP is concerned, the NPP of crop increased gradually from the west to the east, from the north to the south. The mean annual NPP of dry land ranged approximately from 309.8 gC/(m2·a) to 329.5 gC/(m2·a). The mean annual NPP of paddy field changed from 323.5 (m2·a) to 341.7 (m2·a). Interannual trends in mean annual NPP of both dry land and paddy field were the same, i.e., the NPP was gradually increasing but as demonstrated in this work such trends varied to certain degree in some years. In general, from 2000 to 2006, the mean NPP of farmland in northeastern China increased from 309.1gC/(m2·a) to 331.4gC/(m2·a). The correlation coefficients between NPP of dry land and paddy field, and climatic and topographical factors showed that the mean annual NPP of dry land and paddy field in the growing season suggested a marked positive correlation with precipitation, with a correlation coefficient of 0.53 and 0.37 for dry land and paddy field, respectively. The temperature of the growth season and the mean annual NPP of dry land and paddy field showed statistically significant negative correlation. As the farmlands are generally located in the Northeast China Plain with relatively low altitudes, topographic factors (e.g., elevation, slope, and aspect) had little effect on the mean annual NPP of dry land or paddy field. It can be drawn that precipitation is the most critical factor determining the NPP of farmland in northeastern China. |
| Keywords: | Crop NPP Northeastern China MODIS Precipitation |
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