深耘断根对旱地小麦花后根系衰老及产量的影响

EFFECTS OF DEEP CULTIVATION ROOT CUTTING ON SENESCENCE OF ROOT SYSTEM

在旱地大田条件下研究了深耘断根对旱地高产小麦花后根系衰老及产量的影响 .结果表明 ,4个处理中以冬前深耘断根最好 ,起身期深耘断根与对照 (不断根 )次之 ,冬前和起身期都深耘断根的效果最差 .冬前深耘断根可延迟花后根系活力、根系SOD与CAT活性、根系可溶性蛋白质含量下降及根系MDA含量的升高 ,从而延迟根系衰老 .同时 ,冬前深耘提高了成穗数及成穗率 ,使产量提高 ,因而在旱地高产麦田应提倡冬前深耘断根 .图 5表 1参

The effects of deep cultivation root cutting on the senescence of root system were studied after anthesis and yield of wheat in dry land. The results showed that the deep cultivation root cutting before winter was found best among different growth stage treatments, then finally was the treatment in wheat before jointing and control, and was the treatment before winter and before jointing. The deep cultivation root cutting before winter would delay root senescence by reducing root vigor,the activities of superoxide dismatase(SOD) and catalase(CAT), and the soluble protein content, and also delay the increase of malondialdehyde(MDA) content in root system. Meanwhile, the deep cultivation root cutting before winter would also increase the spike number, the spike number ratio,and the grain yield. It suggests that the technique of deep cultivation root cutting before winter be widely used in the areas for dry land wheat. Fig 5, Tab 1, Ref 10