基于水分亏缺试验的大豆旱灾损失敏感性评估

发布时间：2018-04-15 22:02

  本文选题：农业旱灾 + 旱灾损失敏感性　； 参考：《水力发电学报》2017年11期

【摘要】：作物旱灾损失敏感性评估对农业旱灾风险管理具有重要意义,基于大豆水分亏缺试验,从前期无水分亏缺、仅考虑当期水分亏缺对当期作物地上部分生长影响的角度构建作物旱灾损失敏感性函数。结果表明:大豆4个生育期旱灾损失敏感性函数基本符合S型趋势规律;分枝期、鼓粒期、花荚期和苗期在当期水分亏缺累积量分别达到4.19、4.15、1.36和1.20时,大豆当期地上部分干物质积累损失量随水分亏缺强度增大的增加速度变化最快,水分亏缺累积量分别达到6.37、5.92、2.22和1.87时,损失量增加速度最快;当期水分亏缺累积量7.4时,大豆各生育期旱灾损失敏感性从大到小的顺序为花荚期鼓粒期分枝期苗期,水分亏缺累积量≥7.4时,敏感性顺序为鼓粒期花荚期分枝期苗期。
[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，

本文编号：1755975