CAJ | 학술논문

通过控制生育期水分条件形成不同程度的干旱胁迫, 对冬小麦生长、产量及生理指标和冠层高光谱反射率对干旱胁迫的反应进行监测, 建立冬小麦减产率与生长、生理及冠层光谱反射率的相关模型.研究结果表明: 不同生育期冬小麦干物质积累速度随水分胁迫程度的增大而减小; 叶绿素含量与水分条件的关系不同于其他参数, 表现为中等水分条件下叶绿素含量最大, 严重水分胁迫下叶绿素含量最低; 不同水分条件下光合速率呈两种不同日变化特征, 且正常供水处理的光合速率明显高于严重干旱处理.光合速率和增强植被指数(EVI)同冬小麦减产率相关性较强, 能够建立较好的关系模型用于小麦产量预测.
통과공제생육기수분조건형성불동정도적간한협박, 대동소맥생장、산량급생리지표화관층고광보반사솔대간한협박적반응진행감측, 건입동소맥감산솔여생장、생리급관층광보반사솔적상관모형.연구결과표명: 불동생육기동소맥간물질적루속도수수분협박정도적증대이감소; 협록소함량여수분조건적관계불동우기타삼수, 표현위중등수분조건하협록소함량최대, 엄중수분협박하협록소함량최저; 불동수분조건하광합속솔정량충불동일변화특정, 차정상공수처리적광합속솔명현고우엄중간한처리.광합속솔화증강식피지수(EVI)동동소맥감산솔상관성교강, 능구건립교호적관계모형용우소맥산량예측.
In this study, the correlation between yield reduction rate and the relevant key performance indicators of growth, physi-ology and canopy hyperspectral reflectivity of winter wheat are established at different drought levels via soil water content control at different growth stages. The results show that dry-matter accumulation rate decreases with increasing drought stress at different growth stages. The correlation between chlorophyll content and soil water condition differs from that for the other parameters. Chlo-rophyll content is maximum in moderate drought stress and minimum in severe drought stress. Daily variation in photosynthetic rate exhibits two different characteristics, with a higher photosynthetic rate under normal soil water condition than in serious drought stress. Furthermore, an optimal relational model formulated from yield reduction rate with photosynthetic rate and enhanced vegeta-tion index (EVI) can be used to estimate winter wheat yield.