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Research Of The Impact And Its Countermeasure Of Climate Change On The Major Crops Production In Heilongjiang Province

Posted on:2015-04-12Degree:MasterType:Thesis
Country:ChinaCandidate:C X LiFull Text:PDF
GTID:2370330488998347Subject:Ecology
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This article selects 78 weather stations in Heilongjiang province in 1961-2010 the temperature,precipitation,sunshine hours,relative humidity and other climate data and 1954-2010,the main food crops(corn,rice,soybeans,wheat)yield data as the foundation,using the spatial difference,Mann-Kendall mutation test,the method such as coefficient of linear trend of climatic resources in Heilongjiang province and the main food crop,The results show that:(1)In over the last 50 years,Heilongjiang province,four seasons,the decadal mean temperature are increased,among them,the largest contribution to the winter warming,0.52?/10a,annual average temperature mutations in 1988,and four seasons temperature s largest occurs mostly in 00s of the 20th century;Over the last 50 years,Heilongjiang province showed a trend of decrease in annual precipitation fluctuation,trend is not obvious,1961-2010 years,nine mutations.The spring and winter precipitation increased,summer and autumn showed a trend of decrease.Four seasons throughout the year and rainfall decadal change each are not identical,but the volatility is stronger;over the last 50 years,Heilongjiang province,four seasons throughout the year,and decadal sunshine all showed a trend of decrease.Sunshine time mutations occur in 1983;Heilongjiang province nearly 50 years average relative humidity fluctuations in a weak downward trend.(2)Planting structure from the major crops in Heilongjiang province in the early days after foundation for corn,wheat,soybeans,starring become now is given priority to with maize,rice,soybean,rice planting proportion increase year by year,wheat decreased;Rice planting area to the north to the east extension,proportion rises year by year,the proportion of wheat sharp drop,planting area in north obviously,the proportion of corn in a relatively stable to the north and east extending continuously,on the basis of soybean planting focus gradually move northward,planting density increased significantly.(3)Climate factor for the major crops in heilongjiang province have significant influence on the yield,the temperature rise per 1?,which can lead to corn,rice,soybeans,wheat yield were increased about 541.6kg/hm2,336.8kg/hm2,195.8kg/hm2,289.3kg/hm2.The change of the production of the major crops in Heilongjiang province with existence is closely related to climate change.(4)Future climate change on agriculture has a great influence,therefore in order to guarantee the smooth development of agriculture,the agricultural structure of Heilongjiang province and proper adjusting cropping system.The layout of the improved varieties,planned for the varieties of agriculture.Choose some drought,waterlogging,more varieties of crops,agricultural plant diseases and insect pests of might expect,such as agricultural disasters take beneficial to prevent and solve technology,is the only way to reduce the negative impact of Heilongjiang province agriculture climate factors.
Keywords/Search Tags:climate change, Crop yield, impact, countermeasures, Heilongjiang
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