本文選題：農(nóng)業(yè)旱災(zāi) + 旱災(zāi)損失敏感性��； 參考：《水力發(fā)電學(xué)報》2017年11期

【摘要】：作物旱災(zāi)損失敏感性評估對農(nóng)業(yè)旱災(zāi)風(fēng)險管理具有重要意義,基于大豆水分虧缺試驗,從前期無水分虧缺、僅考慮當(dāng)期水分虧缺對當(dāng)期作物地上部分生長影響的角度構(gòu)建作物旱災(zāi)損失敏感性函數(shù)。結(jié)果表明:大豆4個生育期旱災(zāi)損失敏感性函數(shù)基本符合S型趨勢規(guī)律;分枝期、鼓粒期、花莢期和苗期在當(dāng)期水分虧缺累積量分別達到4.19、4.15、1.36和1.20時,大豆當(dāng)期地上部分干物質(zhì)積累損失量隨水分虧缺強度增大的增加速度變化最快,水分虧缺累積量分別達到6.37、5.92、2.22和1.87時,損失量增加速度最快;當(dāng)期水分虧缺累積量7.4時,大豆各生育期旱災(zāi)損失敏感性從大到小的順序為花莢期鼓粒期分枝期苗期,水分虧缺累積量≥7.4時,敏感性順序為鼓粒期花莢期分枝期苗期。
[Abstract]:The sensitivity assessment of crop drought loss is of great significance to agricultural drought risk management. Based on the experiment of soybean water deficit, there is no water deficit in early stage.The sensitivity function of crop drought loss was constructed from the perspective of the effect of water deficit on the growth of the aboveground part of the current crop.The results showed that the drought sensitivity function of soybean in four growth stages was basically in accordance with the trend of S pattern, and the accumulation of water deficit in the branching stage, grain filling stage, flowering and pod stage and seedling stage were 4.194.151.36 and 1.20, respectively.The accumulation loss of dry matter in the aboveground part of soybean increased the fastest with the increase of water deficit intensity. When the accumulation of water deficit reached 6.37 ~ 5.92 ~ 2.22 and 1.87, respectively, the loss of dry matter increased the fastest, and the accumulation of water deficit was 7.4 in the current period.The order of drought loss sensitivity of soybean from big to small is flowering pod stage, seed stage, branching stage, and when the accumulation of water deficit is 鈮，

本文編號：1755975