2) turf density
草坪密度
1.
By measurement of underground biomass and observation and rating of turf density and disease resistance of cool season turf mixture (tall fescue+Kentucky bluegrass), the distribution and seasonal change of turfgrass underground biomass was studied.
该研究通过对冷季型混播草坪 (高羊茅 +草地早熟禾 )地下生物量的测定 ,结合草坪密度和抗病性的观测 ,研究了草坪地下生物量的空间分布和季节变化 ,同时对草坪地下生物量与草坪密度变化和抗病性的关系作了一些探讨 。
3) grass density
草丛密度
4) clutter density
杂波密度
5) doping density
掺杂密度
6) low density inclusion
低密度夹杂
1.
The process principle and advantages of the electron beam cold hearth melting technology, the research development of the removal of high, low density inclusion and the control of A1 volatilization are introduced.
综述了钛合金熔炼技术的研究进展,并介绍了电子束冷床的原理及优点和其去除高、低密度夹杂以及控制Al元素挥发的技术现状。
补充资料：非密度制约因素(见密度制约因素)
非密度制约因素(见密度制约因素)
l焦非密度制约因素见生态因素、密度制约后
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条