1) dynamic thinning line
自然稀疏动力线
1.
The researches on self thinning pure stands for 40 years in the world were summarized and evaluated including self thinning rule, allometric model, mean individual weight density trajectory during the course of self thinning, species self thinning line and dynamic thinning line, the relationship between the slope of self thinning line and biomass, the relationship between the self thinning and co.
评述 4 0 a来世界上有关纯林自然稀疏的研究内容 ,包括了自然稀疏法则 ,异速生长模型、平均个体重与密度的时间轨线 ,种的自然稀疏线和自然稀疏动力线的关系 ,自然稀疏线的斜率与生物量的关系 ,自然稀疏与竞争密度效果的关系 ,自然稀疏的机
2) species self thinning line
种的自然稀疏线
1.
The researches on self thinning pure stands for 40 years in the world were summarized and evaluated including self thinning rule, allometric model, mean individual weight density trajectory during the course of self thinning, species self thinning line and dynamic thinning line, the relationship between the slope of self thinning line and biomass, the relationship between the self thinning and co.
评述 4 0 a来世界上有关纯林自然稀疏的研究内容 ,包括了自然稀疏法则 ,异速生长模型、平均个体重与密度的时间轨线 ,种的自然稀疏线和自然稀疏动力线的关系 ,自然稀疏线的斜率与生物量的关系 ,自然稀疏与竞争密度效果的关系 ,自然稀疏的机
3) natural thinning
自然稀疏
1.
In the intermediate cutting intensity experiment of the Cunninghamia lanceolata Plantation for 20 years,the change pattern of stand natural thinning through the different intermediate cutting intensities was studied,the relationship between tree number of the natural thinning and the stand intensity & site conditions was revealed,the mathematical equation Mk_1·k_2 of natural thinning lines of C.
在杉木人工林抚育间伐强度试验20年中,研究不同间伐强度林分自然稀疏的变化,揭示自然稀疏株数与林分密度和立地条件的关系,对杉木林密度管理图自然稀疏线数学方程M=k1·k2作出检验,提出不同间伐强度林分直径、树高和林冠结构等。
4) Self thinning
自然稀疏
1.
mongolica on sandy soil during their self thinning.
林分在自然稀疏过程中 ,与密度相关的死亡是由林木大小的增加引起的。
5) Self-thinning
自然稀疏
1.
The Self-thinning Law of Pinus taiwanensis Natural Forest in Wuyishan National Nature Reserve;
武夷山国家级自然保护区黄山松天然林自然稀疏规律研究
2.
Yoda s -3/2 power rule or law of self-thinning based on the isometric scaling growth of plant,as well as a-4/3 law of self-thinning based on the energy equivalence ecological theory and the allometric relationship between metabolic rate and body mass of individuals are reviewed.
由密度导致的植物种群的自然稀疏现象,是植物种群生态学研究的热点。
6) selfthinning rule
自然稀疏法则
补充资料：谱线自然宽度
| 谱线自然宽度 spectral line，natural width of 谱线仅取决于原子辐射本身性质所引起的宽度。又称固有宽度。按照经典理论，原子因辐射而受到辐射阻尼作用，作阻尼振动，辐射的电磁波是具有有限长度的阻尼波，其傅里叶频谱具有一定的宽度，为1.2×10-4埃（  ），与谱线的波长无关。按照量子力学，原子的每个能级具有一定的平均寿命τ和能级宽度Γ，两者遵从不确定关系τΓ≥h。平均寿命越长，则能级宽度越小。能级之间跃迁时，发射的谱线具有一定的宽度，由上下能级宽度之和确定。不同的能级具有不同的平均寿命和不同的能级宽度，因而不同能级间跃迁发射的谱线具有不同的自然宽度。通常能级寿命为10-8～10-9秒量级，谱线自然宽度的数量大致为10-4～10-3 。 |
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