🌲 林业资源工具

🌴 单株立木材积计算器Tree Volume 输入胸径与树高，按一元/二元材积表或实验形数法、望高法计算单株立木材积，并对比多种公式结果，用于单木出材量估算。Tree Volume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🪵 原木材积计算器Log Volume 输入原木小头直径与材长，按国家 GB4814-84 标准公式（含多个径级公式）计算单根材积并支持多根汇总，用于原木检尺与木材贸易计量。Log Volume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 林分密度结构Density 5 输入样地面积、株数、平均胸径，计算每公顷株数、林分密度指数（SDI）和林分断面积Density 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌳 林分蓄积量计算器Forest Volume 选择角规测树、标准地法或平均实验形数法，输入胸径、树高与形数等，计算林分每公顷蓄积量，用于森林资源调查与采伐量评估。Forest Volume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🗺️ 林地面积计算器Forest Area 输入林地形状尺寸或 GPS 边界坐标，计算面积并支持坡地投影改平，可在亩、公顷、平方米间换算，用于林地确权、造林规划与资源调查。Forest Area - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 林权面积勘测Area 18 输入林地多边形顶点坐标（每行一个，格式 x,y），按顺时针或逆时针顺序排列，自动计算面积和周长Area 18 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 📈 树木生长率计算器Growth Rate 输入前后两次测定的材积与时间间隔，按普雷斯勒公式、复利公式等计算树木连年生长量与平均生长量及生长率，用于林木生长监测与成熟龄判断。Growth Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🎋 树龄估算器Tree Age 选择年轮法、生长锥法或胸径回归法，输入相应参数估算树木年龄，用于林木资产评估、古树鉴定与生长研究。Tree Age - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌍 森林碳汇计算器Carbon Sequestration 输入林分蓄积、木材密度与含碳系数，按生物量—碳储量—CO₂当量链条估算森林碳汇量与可交易的碳汇价值，用于林业碳汇项目核算。Carbon Sequestration - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 森林郁闭度计算Forest Canopy Closure Calculator 按样点法统计树冠遮蔽比例估算郁闭度（0~1），支持样点布设与结果校验，用于森林资源调查与林分密度评估，纯前端。Estimate canopy closure by point sampling. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 生物多样性 Shannon 指数Biodiversity Shannon Index 生物多样性 Shannon 指数计算器。输入各物种个体数，计算 Shannon-Wiener 多样性指数、Pielou 均匀度、Simpson 优势度与 Margalef 丰富度，用于群落生态学研究。Compute the Shannon diversity index for species communities. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Fore... 🌲 病虫害监测Pest 1 记录样株病虫害等级与发生率，按轻度中度重度统计发生面积与趋势，辅助林地管护决策，纯前端登记数据不出境。Pest 1 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 经济林产量预测Yield 输入种植面积、每亩株数、单株产量与单价，预测经济林总产量与总产值，用于果园、油茶等经济林经营规划与收益测算。Yield - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 蓄积量估算Estimate 32 输入样地面积、平均胸径、平均树高与株数，采用实验形数法估算单株材积与单位面积蓄积量，用于森林资源调查与林分评估。Estimate 32 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 负离子浓度评估Concentration 5 输入空气负离子浓度(个/cm³)评估空气质量等级与森林康养适宜性，用于景区环境评价、康养基地选址与生态监测参考。Concentration 5 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 造林密度优化Density 6 输入株距、行距、造林面积、单株苗木成本，计算每亩株数、总株数和造林成本Density 6 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 造林密度计算器Planting Density 输入树种、立地条件与株行距，计算单位面积造林株数并推荐适宜密度，避免过密或过稀，用于造林设计与苗木需求测算。Planting Density - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 采伐强度设计Strength 4 输入林分蓄积量、采伐比例和回归年（采伐周期），计算采伐量、保留蓄积量和年均允许采伐量Strength 4 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 🌲 野生动物种群估算Estimate 33 输入样线长度、单侧平均发现距离、观测到的痕迹/个体数，采用样线法估算种群密度Estimate 33 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools. 📏 锯材材积计算器Timber Volume 按 GB4815-84 标准计算板方材材积，支持批量汇总、出材率与重量估算，用于锯材交易、仓储与加工配料核算。Timber Volume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Forestry tools.