【摘要】 为了更好地研究黄土高原人工刺槐林根系的分布特征,完善细根生长模型。应用傅里叶级数拟合法研究了细根生长的波动性,修正细根垂直生长模型,建立了含波动项的细根生长模型。根据黄土高原人工刺槐林细根的调查数据,结果表明:含波动项的细根生长模型对数据的拟合精度达到0.9585,提高了垂直生长模型的精度,能够更好地反映细根随土层深度垂直变化的生长状况,对研究黄土高原人工刺槐林根系的生长及其与土壤水分的关系具有指导意义。更多还原

【Abstract】 The aim was to study the distributed characteristic system of Robinia pseudoacacia artificial forest root in the loess plateau well, and consummate the fine root growth model. The author studied on the volatility of fine root growth using Fourier series fit method, and established a model with fluctuations by revising the vertical growth model of fine root. It verified that the growth model with fluctuations fitted the data more accurate, whose coefficient of determination was 0.9585, and reflected the growth of fine root with soil depth variation well, according to the investigation on fine root of Robinia pseudoacacia in the loess plateau. It was useful to research the fine root growth and its relationship with soil water.更多还原