搜索结果: 181-195 共查到“林学”相关记录16549条 . 查询时间(0.479 秒)
天津农学院专利:一种树干含水率测量方法
天津农学院 专利 树干含水率 测量方法
<
2024/1/12
本发明涉及一种树干含水率测量方法,包括以下步骤:步骤1、在树干上沿轴向选取两点并分别布设金属电极a和金属电极b;步骤2、计算步骤1中金属电极a、金属电极b和树干构成的电源的内阻;步骤3、通过树干含水率与电源内阻之间的关系模型MC=f(R i )计算树干含水率。本发明不需要构建复杂的测量电路,测量方法简单、测量成本低。
天津农学院专利:一种基于等效电源内阻的树干含水率测量方法及装置
天津农学院 专利 树干含水率 测量方法
<
2024/1/12
本发明涉及一种基于等效电源内阻的树干含水率测量方法,包括以下步骤:步骤1、在树干上沿轴向选取两点并分别布设金属电极a和金属电极b;步骤2、计算步骤1中金属电极a、金属电极b和树干构成的电源的内阻;步骤3、通过树干含水率与电源内阻之间的关系模型MC=f(R i )计算树干含水率。本发明不需要构建复杂的测量电路,测量方法简单、测量成本低。
北京农学院专利:古树根系透气装置
北京农学院 专利 古树根系 透气装置
<
2024/1/12
本实用新型的古树根系透气装置,包括中空的通气板体,通气板体由多个平行管体侧面连接形成,管体的横截面为矩形,管体的上端开口,每一管体的侧壁上设置有多个通气孔。本实用新型的古树根系透气装置可以使古树根系土壤周围形成空气对流,既为古树根系细胞呼吸提供充足的氧气,又能排出古树根系细胞呼吸产生的热量和二氧化碳,促进古树根系的生长,进而促进古树的生长。本实用新型的古树根系透气装置可以自由、灵活地组装,以适合于...
上海农林职业技术学院植物科学技术系刘承珊副教授(图)
刘承珊 上海农林职院植科系 园林树木 园林生态
<
2024/1/18
西北农林科技大学林学院张晓教授团队在森林次生演替过程中土壤细菌群落α多样性和β多样性的驱动机制研究方面取得新进展(图)
森林 次生演替 土壤细菌群落 α多样性 β多样性 驱动机制
<
2024/2/4
近日,林学院张晓教授团队土壤微生物多样性机制方面取得新进展,研究成果以 “Species pool, local assembly processes: disentangling the mechanisms determining bacterial α and β diversity during forest secondary succession”为题发表于《Molecular Eco...
Variations in Soil Properties and CO2 Emissions of a Temperate Forest Gully Soil along a Topographical Gradient
CO2 emission respiration C sequestration forest gully forest soil enzymatic activity
<
2024/1/11
Although forest soils play an important role in the carbon cycle, the influence of topography has received little attention. Since the topographical gradient may affect CO2 emissions and C sequestrati...
Seasonal Variations in Carbon, Nitrogen, and Phosphorus Stoichiometry of a Robinia pseudoacacia Plantation on the Loess Hilly Region, China
ecological stoichiometry plants-litter-soil seasonal variation plantation Loess Plateau
<
2024/1/11
Seasonal variations in stoichiometry are a crucial regulatory mechanism for plant communities that respond to environmental changes. However, the seasonal characteristics of stoichiometry in plants, l...
Empowering Forest Owners with Simple Volume Equations for Poplar Plantations in the órbigo River Basin (NW Spain)
tree plantations growth equations rotation length growth rates poplar productivity
<
2024/1/11
Hybrid poplar plantations are becoming increasingly important as a source of income for farmers in northwestern Spain, as rural depopulation and farmers aging prevent landowners from planting other la...
Risk aversion hinders forestry professionals to adapt to climate change
Adaptation Risk Uncertainty Lottery choice Forest Perception
<
2024/1/11
Forestry?professionals' attitudes towards risk and uncertainty under climate change, together with their perception about suitability of adaptation strategies, were investigated in Central Europe. We ...
Nonlinear mixed-effects scalar-on-function models and variable selection
Canonical correlation Functional least angle regression (fLARS) Gaussian process prior Movement data Scalar-on-function regression Variable selection
<
2024/1/11
This paper is motivated by our collaborative research and the aim is to model clinical assessments of upper limb function after stroke using 3D-position and 4D-orientation movement data. We present a ...
Remote Sensing Applications in Monitoring of Protected Areas
protected areas (PAs) biodiversity conservation spatiotemporal dynamics climate change human disturbances management and governance
<
2024/1/11
Protected areas (PAs) have been established worldwide for achieving long-term goals in the conservation of nature with the associated ecosystem services and cultural values. Globally, 15% of the world...
Temporal nitrogen dynamics in intensively managed loblolly pine early stand development
Short-rotation woody crops (SRWC) Sustainability of production forestry Nitrogen budget Nitrogen use efficiency Pinus taeda Silviculture
<
2024/1/11
Forest production is strongly dependent on nutrient uptake; however, sustainable management of intensively managed plantations requires an improved understanding of this relationship when fertilizatio...
Soil amendment improves carbon sequestration by trees on severely damaged acid and metal impacted landscape, but total storage remains low
Carbon sequestration Tree restoration Jack pine White birch Acidification Impacted landscape Soil organic carbon
<
2024/1/11
Landscape carbon storage is a key component of climate change mitigation. Tree planting on degraded land has been identified as an effective carbon capture strategy, but it is unclear how various asso...
Climate change induces multiple risks to boreal forests and forestry in Finland: A literature review
bark beetles boreal forests climate change drought forest damage forest fire heavy snow loading Heterobasidionroot rot wind damage
<
2024/1/11
Climate change induces multiple abiotic and biotic risks to forests and?forestry. Risks in different spatial and temporal scales must be considered to ensure preconditions for sustainable multifunctio...