谷子根系生长发育规律及其在土壤中分布的动态模拟

Growth and Developmental Rhythm of Millet Root System and Its Dynamic Distribution in Soil

通过对两个谷子品种在不同生育时期的根系取样，研究了其根重、根长在土壤中分布随时间的变化规律。谷子平均根深在１３０ｃｍ左右，０～２０ｃｍ土层中根系表面积占总根系表面积的８０％以上；谷子早期生成的次生根一般向土壤深层生长，而后期生成的根系扎得较浅，也是谷子中后期生长的主要根群。根据测定结果，建立了谷子根系生长的动态模型。

That the distribution of root weight and length in soil changed with time was studied by sampling root system at different stages for two millet varieties.The average extent of the root system of millet was about 130 cm,the root surface area at 0～20cm soil layer was more than 80% of the total one.The second ary roots developed at early stage usually growed to deepsoil,and the roots ocurred at late stage got into shallow soil which were the main root system during mid late period.Based on the determinations,dynamic simulation of millet root growth was established.