深耘断根对旱地高产小麦花后根系干重及产量的影响  

Effects of Deep Cultivation root Cutting on Dry Weight of Root System After Anthesis and Yield in Dry Land Wheat of High Yield

作　　者：石岩[1] 位东斌[1] 于振文[2] 余松烈[2] 

机构地区：[1]山东莱阳农学院旱作研究所,莱阳265200 [2]山东农业大学农学系,泰安271018

出　　处：《华北农学报》1999年第3期91-95,共5页Acta Agriculturae Boreali-Sinica

摘　　要：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 干重 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 效果最差 。冬前深 耘断根 可增加中 、下层根 系的重 量和 比率， 降低 根系 生长 冗余 性，控 制最高总茎 数，提高 成穗数及 成穗率 ，使子粒产 量中来 自花后光 合器 官输 送的 比例 增加， 从而 使产 量提高，因 而在旱地 高产麦田 应推广 冬前深耘 断根。The effects of deep cultivation root cutting on the dry weight of root system after anthesis and yield have been studied in dry land wheat with high yield.The results are as follows:the best effect obtained from 4 treatments is cultivation root cutting before winter stage,next by the treatment in the starter stage treatment and in control, lastly by the treatment in the before winter stage and starter stage.The deep cultivation root cutting in before winter stage will increase the weight and ratio of root system in middle and lower layer,the results will decrease the root redundancy.Meanwhile,the deep cultivation root cutting in before winter stage will control the maximum total stem number,increase the spike number and the spike number ratio,the ratio of grain yieid coming from the photosynthetic organ transported after anthesis increases,and increase the grain yield.So the technology of deep cultivation root cutting in before winter stage should be spread in dry land wheat of high yield.

关 键 词：小麦 旱地 深耘断根 根系干重 产量 

分 类 号：S512.101[农业科学—作物学]