冬小麦根系活力与产量性状关系的研究

Studies on Relations between Root Vigor of Winter Wheat and Its Yield Characters

在大田条件下对 6个冬小麦品种 (系 )不同生育时期根系活力 (0～ 2 0cm耕层 )的变化及其与产量性状的关系进行了分析。结果表明 ,在整个生育期内 ,不同小麦品种 (系 )的根系活力变化总趋势相似 ,但不同的品种 (系 )间存在差异 ,华麦 9号、2 10 15、鄂恩 1号、华麦 8号等 4个品种 (系 )根系活力在拔节期增至最大值 ,而鄂麦 12号、92 14等 2个品种 (系 )在孕穗期达最大值。小麦整个生育期内的根系活力的平均值与单株产量呈极显著正相关 ,但不同生育期根系活力对产量性状的影响并不相同 ,分蘖期根系活力对单株成穗数影响较大 ,孕穗期根系活力对穗粒数影响较大 ,千粒重受拔节期根系活力影响较大 ,穗粒重受分蘖期、灌浆期根系活力的影响较大。

This paper analysed the changes of root vigor of six different varieties of winter wheat at different stages and relations between root vigor and yield characters. The results showed that, the trend of changes of root vigor at whole stages was much alike, but differences exist amony different wheats. The root vigor of some wheats such as Huamai 9,21015,Een 1,Huamai 8 and so on reached the top at jointing stage, the root vigor of some wheats such as Emai 12,9214 and so on reached the summit at booting stage. The relation between average value of root vigor at whole stages and yield per plant was a close linear relationship, but at different stage, the afluence of root vigor on the yield characters was different, the root vigor at tilling stage had a comparative effect on No.of spikes per plant, the root vigor at booting stage had a comparative effect on No.of grains per ear, the root vigor at jointing stage had a comparative effect on 1000 grains weight and the root vigor at tilling stage and milky stage had a comparative effect on grain weight per ear.