Spatial-temporal characteristics of maize production potential change under the background of climate change in Northeast China over the past 50 years
Received date: 2015-10-19
Request revised date: 2016-03-07
Online published: 2016-05-10
Copyright
Using GAEZ (Global Agro-Ecological Zones) model, the agro-climatic constraints, soil, topography and other factors were used to estimate maize production potential in Northeast China during 1961-2010, and the spatial and temporal patterns of maize production potential caused by climate change in this region in the past 50 years were analyzed. Results are shown as follows: (1) The average maize production potential had a larger fluctuation in Northeast China during 1961-2010. The maize production potential increased by 80.00 kg/hm2 per decade in Northeast China in the past 50 years; (2) Frequent changes of the maize production potential took place at the turn of the 20th century due to the changes in climate; (3) Heilongjiang province saw the highest total production potential of maize, namely, the increasing range of maize production potential was the highest, followed by Jilin province, and Liaoning province was the lowest in the past 50 years; (4) The production potential of maize fluctuated dramatically in Heilongjiang in the years of 1961-2010, while Jilin and Liaoning were in a relatively stable state; (5) In the past 50 years, maize suitable planting areas slightly increased in Northeast China, which was mostly found in the northwestern Heilongjiang. Meanwhile, the area with higher production potential increased significantly and showed the trend of northward movement. This study provides a theoretical basis for efficient utilization of climate and land resources and the optimization of maize production distribution.
Key words: climate change; maize; production potential; GAEZ model; Northeast China
DU Guoming , ZHANG Luyang , XU Xinliang , WANG Jieyong . Spatial-temporal characteristics of maize production potential change under the background of climate change in Northeast China over the past 50 years[J]. GEOGRAPHICAL RESEARCH, 2016 , 35(5) : 864 -874 . DOI: 10.11821/dlyj201605005
Fig. 1 The diagram of the GAEZ model图1 GAEZ模型结构图 |
Fig. 2 Relationship between maize production potential and per unit area yield in Northeast China in 1990-2010图2 1990-2010年东北三省玉米生产潜力与单产之间的关系 |
Fig. 3 The distribution of maize production potential in Northeast China in 2010图3 2010年东北三省玉米生产潜力分布 |
Tab. 1 Maize production potential value in different intervals among three provinces in 2010 (%)表1 2010年三个省份玉米生产潜力不同区间值比例构成(%) |
| <1000 kg/hm2 | 1000~3000 kg/hm2 | 3000~5000 kg/hm2 | 5000~7000 kg/hm2 | 7000~9000 kg/hm2 | >9000 kg/hm2 | |
|---|---|---|---|---|---|---|
| 黑龙江 | 11.31 | 13.36 | 12.78 | 17.90 | 27.92 | 16.73 |
| 吉林 | 14.47 | 18.55 | 20.36 | 19.59 | 20.22 | 6.81 |
| 辽宁 | 17.40 | 20.73 | 16.06 | 17.36 | 17.05 | 11.41 |
Fig. 4 Changes of average maize production potential in Northeast China in 1961-2010图4 1961-2010年东北玉米平均生产潜力变化情况 |
Fig. 5 Mann-Kendall statistics curve of maize production potential in Northeast China in 1961-2010图5 1960-2010年东北三省玉米生产潜力的Mann-Kendall统计量曲线 |
Fig. 6 Changes of total maize production potential in Northeast China in 1961-2010图6 1961-2010年东北三省玉米总生产潜力变化情况 |
Fig. 7 Changes of average maize production potential in Northeast China in 1961-2010图7 1961-2010年东北三省玉米平均生产潜力变化情况 |
Tab. 2 Relevant statistical indicators value表2 相关统计指标数值 |
| 总生产潜力变化幅度(104t/10a) | 年均生产潜力平均值(kg/hm2) | 平均生产潜力变化幅度(kg/(hm2·10a)) | |
|---|---|---|---|
| 黑龙江 | 5457.6 | 4679.02 | 134.17 |
| 吉林 | 934.34 | 4477.94 | 47.61 |
| 辽宁 | 54.64 | 4495.02 | 6.68 |
Fig. 8 Long-term trend curve of maize production potential in Northeast China in 1961-2010图8 1961-2010年东北三省玉米生产潜力长期趋势曲线 |
Fig. 9 Maize production potential fluctuation index of Northeast China in 1961-2010图9 1961-2010年东北三省玉米生产潜力波动指数 |
Fig. 10 The distribution of maize production potential in Northeast China in 1961-2010图10 1961年、1970年、1980年、1990年、2000年、2010年东北三省玉米生产潜力分布图 |
The authors have declared that no competing interests exist.
| [1] |
Intergovernmental Panel on Climate Change. Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press, 2014.
|
| [2] |
《第三次气候变化国家评估报告》编写委员会. 第三次气候变化国家评估报告. 北京: 科学出版社, 2015.
[Editing Commission of the Third National Report on Climate Change of China. The Third National Report on Climate Change. Beijing: Science Press, 2015.]
|
| [3] |
[
|
| [4] |
[
|
| [5] |
[
|
| [6] |
[
|
| [7] |
[
|
| [8] |
[
|
| [9] |
[
|
| [10] |
[
|
| [11] |
|
| [12] |
|
| [13] |
[
|
| [14] |
[
|
| [15] |
[
|
| [16] |
[
|
| [17] |
[
|
| [18] |
[
|
| [19] |
[
|
| [20] |
[
|
| [21] |
[
|
| [22] |
[
|
| [23] |
[
|
/
| 〈 |
|
〉 |