| The impact of climate change in agricultural production has become a major factor. And China's Heilongjiang Province is the most significant warming in the world. The coming period will continue to climate warming, the reality that will bring agricultural production to varying degrees. Rice, corn is the main crop in Heilongjiang Province and caldus. So I chose to rice, corn study global warming impact of their production.After the collation of data collection, statistical formula, SPSS 11.5 software, EXCEL and use of graphics software, Arcview GIS 3.2 mapping methods map the spatial distribution of Heilongjiang Province in recent 45 years of climate change are analyzed. The past 45 years through further study of climate change on rice and corn production.Heilongjiang Province on rice yield and weather-related analysis, we found that temperature is the main rice-feng apologized meteorological factors, the same temperature in order to infer the impact of corn production is the main meteorological factors. Because corn is caldus and higher temperature requirements of crops. Comparison of temperature and rice growing season, corn production output changes can be seen the trend with temperature changes, the area also increased with the increasing production trend. Heilongjiang Province with an average accumulated temperature≥10℃isogram moved northward. Rice, corn planting area also moving northward. Rice-growing areas in the original will remain unchanged at the same time, rice growing areas with the focus on 2300 ~ 2400℃≥10℃accumulated temperature line moving northward. Corn-growing areas have also taken place in the north, while the growth of the advantages of the original area of corn, 2 300 ~ 2 400℃≥10℃line between effective temperature and, owing to a more hi meet warm crops - rice planting conditions, because In another more economic benefits, and therefore, has been replaced by the expansion of the rice. With the accumulated temperature≥10℃effective 3 000℃and 2 800℃isotherm north of Mobile, younger maize varieties, production has been improved, cost-effective increase in the corresponding areas are still mainly maize. At the same time, estimates of climate warming on rice, the contribution rate of maize production. Compared with the 80's, 90's contribution to the rate of warming on rice is 26.6% -29.6%, 11.3% of the corn is -31.07%. Period 2000-2005 compared to 80 during the warming of the contribution rate of rice is 31.2% -48.2%, 21.45% of the corn is -52.75%. Finally, the space temperature contrast region of Heilongjiang Province of rice, corn output changes. The results showed that the biggest 10-year warming of Qiqihar, Hegang areas such as rice, maize production is also the most obvious trend; Heihe, Daqing, Harbin rice, followed by the percentage of corn production. And Mudanjiang, Yichun and other places in other areas of production than small, and its relatively small temperature range.Global warming impact on both advantages and disadvantages, and does more harm than good, in terms of Heilongjiang Province is a large outweighs any disadvantages. Strengthening of climate warming on the impact of rice and corn production research, not only related to national food security, the continuation of economic and regional planning for agricultural cultivation and crop production and government departments to provide the scientific basis of decision-making. |
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