Root length density varied with fertigation frequencies, and the ratio of root length for different soil layers to the total root length in the profile varied with fertigation strategies.
施肥频率对根密度的影响主要是引起各土层根密度大小的变化，运行方式则对各土层根长占整个剖面根长总和的比例产生影响。
The experimental results show that the higher the static temperature and the density ratio between two supersonic flow, the more the total pressure losses of flow during mixing.
实验结果表明：混合过程的总压损失随两种超声速流的密度比、静温比增大而增加。
But total pressure loss increases with the increasing of the velocity difference accompanied with the increase of the density and the static temperature ratio.
但速度差随密度比、静温比增大而增大时总压损失亦随之增大。
Moreover, the effects of density and depth ratio, amplitude and wavelength on maximal total force and total moment are analyzed.
分析了相对密度比、深度比、波幅、波长因素对最大总作用力和总力矩的影响。
Moreover, the effects of density and depth ratio, amplitude and wavelength on maximal total force and total moment are analyzed.
分析了相对密度比、深度比、波幅、波长因素对最大总作用力和总力矩的影响。
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