干旱区生态环境知识资源中心(Arid): 2010年中国农作物净初级生产力及其空间分布格局

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	2010年中国农作物净初级生产力及其空间分布格局
其他题名	Spatial patterns of net primary productivity of crops in China
	王轶虹; 王美艳; 史学正; 陈龙; 赵永存; 于东升
来源期刊	生态学报
ISSN	1000-0933
出版年	2016
卷号	36 期号:19 页码:6318-6327
中文摘要	采用20112012年全国实测水稻、小麦、玉米、大豆、油菜、棉花6种作物的生物量获得的干燥系数(DC)、收获指数(HI/)和根冠比(R/S),结合2010年以县为单位的农业统计数据估算了2010年中国农作物产生的净初级生产力(NPP)。2010年中国农作物产生的NPP为596 Tg C,其中地上NPP为517 Tg C,地下NPP为80 Tg C。NPP空间分布不平衡,主要集中在东北的松嫩三江平原、黄淮海平原、长江中下游平原、西南的四川盆地和华南的珠江流域。单位面积农作物产生的NPP介于9-2094 g C m~(-2)a~(-1)之间,平均密度为519 g C m~(-2) a~(-1)。 NPP密度(NPPD)较高的地区主要分布在中国的东部的湿润、半湿润地区以及内陆灌溉条件较好的地区。9个农业区中,黄淮海区农作物产生的NPP最多,东北区NPPD最高,青藏区农作物NPPD最低,产生的NPP也最少。作物种植面积能解释98%农业区之间NPP差异。通过对每个区域内县域NPPD与气候因子和化肥因子做相关分析,发现化肥施用量、日照时数、气温和降水均对NPPD的空间分异有影响,但是9个区域的主导因素不同。
英文摘要	Net primary productivity (NPP) and its response to global change is an important factor to consider in research in this field. A significant pool of carbon (C) is stored in agriculture soils. Crop biomass returned to the soil supports the maintenance of soil organic carbon (SOC). Studying the NPP,and its spatial variation aids SOC balance definition and help elucidating soil carbon dynamics in agroecosystems. In this study, we established a new data bank of dry coefficient (DC),harvest index (HI),and root to shoot ratio (R/S) for rice, wheat, corn grain, soybean, cotton, and oilseed crops based on field samples collected across China from 2011 to 2012. The data bank represents the most recent reference coefficients available in China. Using county-level crop yield information, reported as national agricultural statistics, combined with the DC, HI,and R/S for rice, wheat, corn grain, soybean, cotton, and oilseed crops, we estimated the amount of NPP produced in 2010,and analyzed its spatial distribution. It was estimated that 596 Tg C was produced in 2010 in China’s cropland, mainly distributed in the Huanghuaihai region, the Middle-Lower reaches of Yangtze River and Northeast China. The mean county-level NPP density was 519 g C m~(-2) a~(-1),ranging from 9 to 2094 g C m~(-2) a~(-1). The NPP produced in China’s cropland represents 8% of global crop biomass, suggesting that it makes a large contribution of the croplands, which add to the world’s carbon pool. Greater county-level NPP density (g C m~(-2) a~~(-1)) (NPPD) primarily exists in the humid and semi-humid regions of eastern China, as well as in the regions of northwest China with more developed irrigation. Lower NPP density occurs in arid and semi-arid regions of northwest China. The Huanghuaihai region produced the largest NPP among 9 agricultural regions. While the area of sown land accounted for 98% of this difference, the density of NPP could only explain 31% of the variance among the 9 agricultural regions. The NPPD of Northeast China was the highest and that of the Qinghai-Tibet Plateau as the lowest. In order to assess the impact of climate and fertilizer on NPPD in all 9 agricultural regions,we analyzed the relationships between NPPD and T_0, P_0(the sum of the daily temperature above 0℃ and precipitation in 2010, respectively),T_(10), P_(10)(the sum of the daily temperature above 10℃ and precipitation in 2010, respectively),T (the average temperature in 2010) , TT (the average diurnal temperature difference in 2010) , P (the average precipitation in 2010) , PP (total amount of precipitation in 2010),S (the total hours of sunshine in 2010), and the consumption of chemical fertilizer in 2010. The results indicated that all the factors considered could influence the distribution of NPPD; however, the most influential factors varied among the 9 regions.
中文关键词	农作物 ; 收获指数 ; 根冠比 ; 空间变化
英文关键词	Net primary productivity (NPP) NPPD Crop Net primary productivity (NPP) NPP density harvest index root to shoot ratio spatial variability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5820085
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234817
作者单位	中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京, 江苏 210008, 中国
推荐引用方式 GB/T 7714	王轶虹,王美艳,史学正,等. 2010年中国农作物净初级生产力及其空间分布格局[J],2016,36(19):6318-6327.
APA	王轶虹,王美艳,史学正,陈龙,赵永存,&于东升.(2016).2010年中国农作物净初级生产力及其空间分布格局.生态学报,36(19),6318-6327.
MLA	王轶虹,et al."2010年中国农作物净初级生产力及其空间分布格局".生态学报 36.19(2016):6318-6327.