The injury to winter wheat growth by soil waterlogging and its mechanism
Lu Jun
Zhejiang Agricultural University. Hangzhou,Zhejiang
Abstract
Soil waterlogging lowered wheat leaf photosynthetic rate and transpiration rate. The critical soil moisture of waterlogging for winter wheat is about 90%~100% field capacity. The response of leaf photosynthesis and transpiration was observed during continuing flooding. Waterlogging in the soil not only reduced plant dry matter accumulation but also lowered the ratio of carbohydrate distribution to root, and decreased root vitality. Many of the older leaves died during continuing flooding, and the amount of yellow leaves was closely related to the decrease of root/shoot ratio. When soil waterlogging occurred at the middle or late development stages, plant senesced earlier and grain yield was reduced seriously.
Key words: Waterlogging;Winter wheat;Photosynthesis;Carbohydrate distribution;Green leaf loss;Senescence;
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Citing This Article:
Lu Jun. The injury to winter wheat growth by soil waterlogging and its mechanism. Acta Physiol Sin 1994; 46 (3): (in Chinese with English abstract).