Two new medium parameters related to acoustic attenuation are introduced and an acoustic propagation coefficient is defined.
本文引入两个与声衰减有关的介质参量，定义了声传播系数；
The affinity of self-incompatibility in the mustard family affects the purity of hybrid seed and the propagation coefficient of stock plant.
十字花科自交不亲和性的大小关系到杂交制种的纯度和原种的繁殖系数。
Layering had a high rooting rate, but its propagation coefficient was lower and would injure the mother tree, the roots are also underdeveloped.
费约果压条繁殖生根率高，但其繁殖系数较低，对母树树体损伤严重，且根系不发达，生产上一般也不采用。
The propagation coefficients were closely related to the genotypes, and the maximum propagation coefficient was more than 30(in Genotype TB7-3S).
繁殖系数与基因型密切相关，最高者（TB7-3S）可达30以上。
Studies were made on the vegetative propagation coefficient and cormels biological characters using eighth-excision in different development phase of Lycoris radiate.
在红花石蒜不同生长发育期进行八分法切割繁殖，研究无性繁殖系数和子球生物学性状差异性。
Seedling grew fast in orchard, having strong resistance, but the low survival rate of field cutting, propagation coefficient is not high, limiting the speed of its promotion.
建立园圃其实生苗生长迅速，抗逆性强，但大田扦插育苗成活率低，繁殖系数不高，限制了其推广速度。
Seedling grew fast in orchard, having strong resistance, but the low survival rate of field cutting, propagation coefficient is not high, limiting the speed of its promotion.
建立园圃其实生苗生长迅速，抗逆性强，但大田扦插育苗成活率低，繁殖系数不高，限制了其推广速度。
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