宁夏春小麦抗旱生理指标研究

Study on Drought-resistant Physiological Indicators of Spring Wheat in Ningxia

研究了宁夏不同春小麦品种在水分胁迫下的光合速率 (Pn)、叶绿素荧光 (Fv/Fm)和叶片相对含水量(RWC)的变化。结果表明 ,在水分胁迫下 4个春小麦品种的Pn、Fv/Fm和RWC与对照相比均下降 ,并且下降幅度随春小麦品种的不同而有所差异 ,具有较大的遗传变异。认为Pn。

The rate of photosynthisis(Pn),chlorophyll fluorescence(Fv/Fm) and relative moisture of leaf blade (RWC) of various spring wheat varieties under water stress were studied in Ningxia. The results show that under water stress the Pn, Fv/Fm of 4 spring wheat varieties decreased in comparison with the control and the extents of decrease were different with different wheat varieties. It shows a significant genetic variation. It is concluded that Pn,Fv/Fm and RWC can be used as physiological indicators in identification of drought-resistance of spring wheat of Ningxia. Key word: spring wheat;drought-resistance physiological indicatorsSS Problems and Solutions in New Stage of Agricultural Modernization $$$$ XUE Xingli,YUE Shuming,WU Shijian (Economy & Trade College of Shandong Agriculture University, Tai'an 271018,China),RAM,2000,21(6):325—328 Abstract:The paper proposed that in China the construction of agricultural modernization has stepped in a new stage in view of the radical changes of economy and technology. Then, many problems in the new stage such as system, structure, the entry in WTO ,investment, outlet,etc.are analyzed in this paper. Finally, the basic solutions to these problems are put forward as well.