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《Acta Tritical Crops》 2005-05
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Effect of Plastic Film Mulches on the Leaves Senescence of Spring Wheat

NIU Jun-yi, LI Xing-tao, GAI Yue, WANG He-ling(Agronomy College, Gansu Agricultural University, Lanzhou, Gansu 730070, China)  
In order to reveal the leaves senescence of spring wheat grown with plastic film mulches, the content of chlorophyll, protein, MDA and the cell membrane permeability of the leaves for spring wheat grown with and without plastic film mulches were determined by using simulated tube cultivation. The results showed that spring wheat with plastic film mulches was able to improve the content of chlorophyll and protein of leaves in the earlier growing period and the average increase per day of the content of chlorophyll and protein of the mulched wheat increased by 31.49% and 7.94% than that of unmulched wheat respectively; but it could accelerate the decomposition of chlorophyll and protein in the later period. The content of leaf MDA and the cell membrane permeability of spring wheat with plastic film mulches were much higher than that of unmulched wheat and the average increase per day of the content of MDA and the cell membrane per meability increased by (71.96%~)(11.78%) and 2.42%~9.57% than that of unmulched wheat respectively. Application of plastic film mulches made spring wheat arrive normal senescence stages earlier than unmulched wheat, but it increased dry matter production, grain number per spike and grain weight per spike increased 22.95% and 27.68% than that of unmulched wheat due to soil temperature increased and moisture preserved.
【CateGory Index】: S512.12
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