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作者	单位
姜丽娜，徐光武，黄培新，李金娜，岳影，朱娅林，李春喜	（河南师范大学生命科学学院，河南新乡 453000）

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中文摘要:

为明确不同栽培模式下冬小麦根系生长情况，以矮抗58为材料，通过分析高产、高效和高产高效三种栽培模式下冬小麦根系直径频率所服从的对数正态分布的参数μ和σ，探讨了根系的拓扑结构。结果表明，3种模式下，0~20 cm和20~40 cm土层中小麦根系在特定时期内都表现出能高效运输营养物质的鲱鱼骨形结构，但根系调整为鲱鱼骨形结构的时期和出现位置存在差异。高效模式下，根系鲱鱼骨形结构于拔节前和灌浆前在两个土层中都有出现；高产高效模式下，根系鲱鱼骨形结构于拔节前在两个土层中出现，灌浆前只在0~20 cm土层出现，而20~40 cm土层根系出现鲱鱼骨形结构则是在灌浆中后期；高产模式下，根系鲱鱼骨形结构于拔节前出现在0~20 cm土层，拔节期两个土层中均出现，而灌浆中后期则只出现在20~40 cm土层。从根系结构来看，高产高效模式下，小麦根系可以间接限制营养生长，且在灌浆中后期可以利用深层土壤的营养物质，是具有潜力的栽培模式。

英文摘要:

The objective of this study was to investigate the growth of winter wheat root system under different cultivation patterns. Three cultivation patterns,such as super high-yield cultivation pattern(SH),high efficiency cultivation pattern(HE) and high-yielding and high efficiency cultivation pattern(HH) were designed,and eight sampling points were set from returning green stage to maturity stage of Aikang 58. Using soil coring method,the root diameter frequency distribution was decided in 0-20 cm and 20-40 cm soil layers under three cultivation patterns. These diameter frequency distribution was fitted using lognormal distribution to get the corresponding parameters,μ and σ,to analyse the topological structure of root system. The results indicated that the topological structure of root system was herringbone at specific periods in 0-20 cm and 20-40 cm soil layers under three cultivation patterns. The herringbone root system could exploit nutrients more efficiently,which would provide material support for the growth of winter wheat. The occurring period and location of herringbone root system was different among three cultivation patterns. Under HE pattern,the herringbone root system in 0-20 cm and 20-40 cm soil layers both occurred before jointing stage and grain filling stage. Under HH pattern,the herringbone root system occurred in the two soil layers before jointing stage,while before grain filling stage the herringbone structure only appeared in 0-20 cm soil layer,and during the middle and late stage of grain filling the herringbone root system only appeared in 20-40 cm soil layer. Under SH pattern,the herringbone root system in 0-20 cm soil layer occurred before jointing stage and during jointing stage,while in 20-40 cm soil layer,this structure occurred at jointing stage and middle and late stage of grain filling stage. Therefore,from the view of root system structure,the vegetative growth of winter wheat would be restricted indirectly,and root system could exploit nutrients in deep soil layer at middle and late filling stage under HH pattern,and HH pattern is suggested as the potential cultivation pattern.

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