基于系统工程原理的作物化感潜力评价及其应用初探

A Preliminary Study on the Method Based on System Engineering Theory for the Evaluation of Allelopathic Potential in Crops and Its Application

【目的】探索作物化感潜力评价方法,分析作物整体化感潜势,理论评价黄土高原旱作小麦的综合化感潜势。【方法】建立作物化感潜力的系统工程评价模型,提出作物植株整体评价的定量描述方法,对黄土高原半干旱区4种普通小麦品种化感潜力进行理论上的整体评价和总体化感潜力比较。【结果】对黄土高原半干旱区4种普通小麦品种的化感潜力综合评价理论上得出其化感潜力总体处于较低水平,其中化感潜力综合表现为小偃22号>宁冬1号>丰产3号>碧玛1号。【结论】系统工程评价模型的建立对于辅助快速有效地评价作物品种和单植株的化感潜力和培育具有抗草和高产优质及相关优良农艺特征作物新品种具有重要的科学指导意义。

[Objective] To grope assessment methods in allelopathic potential of crops germplasms, and analyze the comprehensive allelopathic potential of crop cultivars, and in view of theory assay the whole allelopathic potential in winter wheat accessions from the Loess Plateau. [Method] To build system-engineering model and evaluate the comprehensive allelopathic potential of crop cultivars, and propose the quantification method of the whole allelopathic potential in crop accessions was conducted in the present study. Allelopathic potential in a whole level of four winter wheat varieties from the Loess Plateau was estimated in view of system theory and compared. [Result] The model assessed allelopathic potential in different parts of the plants from the time that wheat turned green in the spring until maturity. Results from these models indicated that the four wheat accessions had very weak allelopathic potential. Allelopathic potential declined in the order： Xiaoyan No 22 〉 Ningdong No 1 〉 Fengchan No 3 〉 Bima No I. [Conclusion] This system engineering evaluation method allows for the reasonable assessment of allelopathic potential among crop varieties. It will help plant breeders to select and develop allelopathic crop accessions that combine weed suppression properties with agronomic traits related to yield and quality,