1) root diameter class
根径级
3) root diameter
根径
1.
The corretativity of root diameter and stand tree volume of natural Japanese red pine;
天然赤松根径与立木材积相关关系的研究
4) diameter class
径级
1.
The 70-year restored community and primary forest had the similar species richness and abundance distribution in different diameter classes and height classes.
恢复70年的群落与原始林中的物种丰富度及多度随径级和高度级的分布形式相同,但恢复20年和30年的群落则与原始林不同,并且缺少大径级和较高的树木。
2.
The TLRF had the highest total biomass in the big diameter classes(>5th diameter class),the TMF had the highest total biomass in the first diameter classes,however,no significant difference was found in the second,the third and the fourth diameter classes in the total biomass among the three low elevational tropical forests.
总生物量在胸径≥40 cm径级内热带低地雨林最高,1~10 cm径级内热带季雨林最高,10~40 cm径级内3种群落无显著差异。
5) rhizome and dbh
根径与胸径
1.
Regression analysis between rhizome and dbh of main tree species in nataral forests in North Shaanxi and significat tests on the regression models showed that there was a close straight regression between the rhizame and dbh,definite function existed between the rhizome and dbh,and the established.
通过对陕西天然林几个主要树种根径与胸径的回归分析、回归模型的建立及相关关系进行显著性检验 ,结果表明 ,根径与胸径间存在着密切、显著的直线回归关系 ,根径与胸径间存在着确定的函数关系 ,所建立的回归模型是成立的、可用的。
6) root diameter
根直径
1.
Effect of root diameter on early bolting rate and yield in seedling of Angelica sinensis;
当归苗根直径大小对提前抽薹率及产量的影响
2.
Aimed at the problem of bolting affecting yield of Angelica seriously, the experiment got a lucubrate on Angelica s seed, seedling of different root diameter and bolting rate at different altitude.
针对当归成药期早抽薹严重影响产量的问题,对当归种子、不同根直径大小的苗、以及当归栽培地不同海拔高度的抽薹及生长情况作了深入研究,以期从种子到一年生苗时就排除易导致抽薹的因素,选择适宜栽培的最优栽培海拔地区,为控制早抽薹提供理论依据。
3.
It is concluded that the increasing of secondary root diameter has a relationship with stability to above-ground part.
分析结果表明,\'掖单13\'和\'丹玉13\'初生根直径总体上小于次生根;从第1层至第7层次生根,基本上为发生时间越晚,根直径越大;而2个品种第7层至第9层次生根基部直径的变化趋势有一定的差异。
补充资料：径径
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