四川冬小麥產(chǎn)量對(duì)氣候變化的敏感性和脆弱性研究
發(fā)布時(shí)間:2018-11-25 16:18
【摘要】:論文以四川冬小麥種植區(qū)1981—2012年88個(gè)縣的氣象觀測(cè)數(shù)據(jù)和冬小麥生產(chǎn)數(shù)據(jù)為基礎(chǔ),采用一元線性回歸和逐步回歸等方法,評(píng)價(jià)四川冬小麥產(chǎn)量對(duì)單個(gè)氣候因子及氣候變化的敏感性與脆弱性。結(jié)果顯示:假設(shè)冬小麥生育期內(nèi)平均氣溫和日較差升高1℃、降水量下降100 mm、輻射量下降100 MJ/m~2,冬小麥的產(chǎn)量隨之發(fā)生變化,全生育期降水量下降導(dǎo)致產(chǎn)量敏感的面積最大,占整個(gè)研究區(qū)域播種總面積的6.5%;而輻射量下降使產(chǎn)量脆弱的面積最大,為2.4%。從各個(gè)生育階段來(lái)看,研究區(qū)域內(nèi)冬小麥產(chǎn)量對(duì)播種到拔節(jié)期輻射量下降表現(xiàn)為敏感和脆弱的面積比例最大,分別占9.4%和7.9%。受到4種氣候因子變化的綜合影響,產(chǎn)量對(duì)冬小麥生育期內(nèi)氣候變化表現(xiàn)為敏感的面積占播種總面積的40.0%,在7個(gè)冬麥區(qū)均有分布,產(chǎn)量變化為-23.0%~9.5%;產(chǎn)量脆弱的面積占14.0%,主要分布在川西北高原大部及盆西、盆南和川西南的部分區(qū)域。
[Abstract]:Based on meteorological observation data and winter wheat production data from 88 counties in Sichuan winter wheat growing area from 1981 to 2012, this paper adopts linear regression method and stepwise regression method. To evaluate the sensitivity and vulnerability of winter wheat yield in Sichuan to individual climatic factors and climate change. The results showed that if the mean temperature and diurnal range of winter wheat were increased by 1 鈩,
本文編號(hào):2356730
[Abstract]:Based on meteorological observation data and winter wheat production data from 88 counties in Sichuan winter wheat growing area from 1981 to 2012, this paper adopts linear regression method and stepwise regression method. To evaluate the sensitivity and vulnerability of winter wheat yield in Sichuan to individual climatic factors and climate change. The results showed that if the mean temperature and diurnal range of winter wheat were increased by 1 鈩,
本文編號(hào):2356730
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