氣候變化對四川省主要農(nóng)作物典型生育期的影響
發(fā)布時(shí)間:2019-01-05 15:38
【摘要】:采用氣候傾向率和線性趨勢法分析了四川省農(nóng)業(yè)氣候資源特征以及主要農(nóng)作物典型生育期變化趨勢。結(jié)果表明,1961—2014年全省大部地區(qū)≥10℃初日呈現(xiàn)提前趨勢、終日呈推遲趨勢,≥10℃積溫呈升高趨勢。在此背景下,玉米和水稻出苗期呈提前趨勢,速率分別為6.6d/10a和3.5d/10a;玉米成熟期無明顯變化趨勢,水稻成熟期呈現(xiàn)明顯推遲趨勢,變化速率為2.4d/10a;玉米和水稻生育期天數(shù)均呈現(xiàn)了不同程度的延長。冬小麥出苗期無明顯變化,而成熟期呈現(xiàn)提前趨勢,速率達(dá)2.7d/10a,生育期天數(shù)呈現(xiàn)顯著縮短趨勢,速率達(dá)4.9d/10a?傮w而言,積溫的增加、溫度生長期天數(shù)的延長為生育期長的作物品種種植提供了必要條件,通過品種的選擇和播期調(diào)整,可以充分發(fā)揮資源優(yōu)勢,趨利避害,從而提高農(nóng)作物產(chǎn)量。
[Abstract]:Climate tendency rate and linear trend method were used to analyze the characteristics of agricultural climatic resources and the variation trend of typical growth period of main crops in Sichuan Province. The results show that from 1961 to 2014, the initial day of 鈮,
本文編號:2401962
[Abstract]:Climate tendency rate and linear trend method were used to analyze the characteristics of agricultural climatic resources and the variation trend of typical growth period of main crops in Sichuan Province. The results show that from 1961 to 2014, the initial day of 鈮,
本文編號:2401962
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