探讨并建立了适合于中国华北地区夏玉米水分状况监测的作物水分胁迫指数(CWSI)模型。

The crop water stress index (CWSI) model for monitoring summer maize water stress in North China Plain (NCP) was set up in this paper.

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结果显示平均水分胁迫指数在0.1～0.2左右，是冬小麦最优产量所允许的水分供应状态。

Thus, the average CWSI at 0.1 ~ 0.2 might be taken as the indicator for irrigation scheduling of winter wheat.

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随土壤水分胁迫的加重，各品系的收获指数提高。表明水分胁迫促进了光合同化物向籽粒的运转。

The harvest index of all the test lines increased with the decrease of soil water potentials, indicating that water stress enhances translocation of assimilates to grains.

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