Meteorological data collected at Welsh Short Rotation Coppice (Intensive) sites

As a result of high oil prices in the mid-1970s, many European and Scandinavian countries initiated research programmes investigating fuel production from energy crops. Initial studies were aimed at identifying suitable crop systems. One of the systems tested involved planting coppicing tree species at high densities (around 10,000 stools per hectare) and harvesting above ground growth every two to five years. This system was termed ‘Short Rotation Coppice’ (SRC). In the UK, numerous coppicing tree species were tested using this system (Potter, 1990). Examples include Salix viminalis clones, Populus interamericana clones, Eucalyptus archeri, Alnus cordata, and Northofagus procera. Willow and poplar clones emerged favourably from these trials, producing high yields without succumbing to disease or frost. Other research programmes concentrated on developing harvesting, processing and power generation equipment that could cope with biomass produced by a variety of crop systems including SRC. Political backing for SRC was shown on 20 December 1994 when the UK minister for Energy announced government support for three power generation projects using woodfuel gasification technology. These projects were expected to ‘stimulate substantial commitment to coppicing’.
Although informative, results from early research programmes could not predict the yield of willow or poplar SRC under different environmental conditions. Without this information planners could not make informed decisions as to where SRC plantations and power generation plants should be sited in order to maximise yield and land use efficiency. Growers also needed information on likely yields achievable by different site/clone combinations, in order to estimate their financial return from these crops. For these reasons the Department of Trade and Industry (DTI), the Ministry of Agriculture, Fisheries and Food (now incorporated into the Department of the Environment, Farming and Rural Affairs [Defra]) and the Forestry Commission (FC) sought to quantify and model the yield potential of a diverse range of willow and poplar clones when grown as SRC on agricultural sites across the UK.
The subsequent research programme ‘Yield models for energy coppice of poplar and willow’ was coordinated by ETSU and carried out by Forest Research (FR) and the Department of Agriculture and Rural Development, Northern Ireland (DARDNI, formally Department of Agriculture, Northern Ireland). The backbone of this research programme was a network of 49 field trials established on agricultural land throughout England, Scotland, Wales and Northern Ireland. Data collected from these sites continues to be used in the development of empirical yield models and process based predictive yield models capable of estimating the productivity of varieties grown under a range of environmental conditions.
This data set contains the meteorological data collected at these sites during the project. The variables recorded were:
Mean air temperature (oC); Wet bulb temperature (oC); Maximum air temperature (oC); Minimum air temperature (oC); Mean soil temperature (oC); Maximum soil temperature (oC); Minimum soil temperature (oC); Rainfall (mm); Mean relative humidity (%); Surface wetness; Net solar radiation (W.m-2); Global solar radiation (W.m-2); Wind direction (o); Wind speed (ms-1)

See also Evans S (coordinator), Baldwin M, Casella E, Henshall P, Morgan G, Poole J, Sayce M, Stokes V, Taylor P, Tubby I (2007) Final Report: Yield Models for Energy: Coppice of Poplar and Willow. Report to DTI (B/W2/00624/00/00). Ed: T. Randle and I. Tubby. Attribution statement: Quote Forest Research as the source of the data if used in any subsequent products (including papers and reports)

鉴于20世纪70年代中期油价的高涨，众多欧洲及斯堪的纳维亚国家启动了研究项目，旨在探究能源作物燃料的生产。初期研究旨在识别适宜的作物系统。其中一项测试的系统涉及在高密度（约每公顷10,000株）种植更新型树种，并每隔两至五年收获地上生长。该系统被称为‘短轮伐期更新型’（SRC）。在英国，众多更新型树种使用此系统进行了测试（Potter, 1990年）。例如包括柳树（Salix viminalis）克隆、美洲杨（Populus interamericana）克隆、尤加利树（Eucalyptus archeri）、赤杨（Alnus cordata）和南方铁杉（Northofagus procera）。柳树和杨树克隆在试验中表现出色，产量高且未受疾病或霜冻的影响。其他研究项目集中于开发能够处理包括SRC在内的各种作物系统所产生的生物量收获、加工和发电设备。短轮伐期更新型在1994年12月20日得到了政治上的支持，当时英国能源部长宣布政府支持三个使用木材气化技术的发电项目，这些项目预期将‘显著促进更新型种植’。尽管早期研究项目提供信息，但无法预测柳树或杨树SRC在不同环境条件下的产量。缺乏这些信息，规划者无法作出明智的决定，以确定SRC种植园和发电厂应建在何处，以最大化产量和土地利用效率。种植者还需要关于不同地点/克隆组合可能实现产量的信息，以便估算这些作物的财务回报。鉴于此，贸易工业部（DTI）、农业、渔业和粮食部（现并入环境、农业和农村事务部[Defra]）以及林业委员会（FC）寻求量化并建模在英国农业土地上种植的多种柳树和杨树克隆的SRC产量潜力。随后的研究项目‘杨树和柳树能源更新型产量模型’由ETSU协调，由森林研究（FR）和北爱尔兰农业和农村发展部（DARDNI，原北爱尔兰农业部）执行。该研究项目的基础是在英格兰、苏格兰、威尔士和北爱尔兰的农业土地上建立的49个田间试验网络。从这些地点收集的数据继续用于开发经验产量模型和基于过程预测产量模型，这些模型能够估计在各种环境条件下种植品种的生产力。该数据集包含项目期间在这些地点收集的气象数据。记录的变量包括：平均空气温度（摄氏度）；湿球温度（摄氏度）；最高空气温度（摄氏度）；最低空气温度（摄氏度）；平均土壤温度（摄氏度）；最高土壤温度（摄氏度）；最低土壤温度（摄氏度）；降雨量（毫米）；平均相对湿度（百分比）；地表湿润度；净太阳辐射（W.m-2）；全球太阳辐射（W.m-2）；风向（度）；风速（m/s）。另见Evans S（协调者），Baldwin M，Casella E，Henshall P，Morgan G，Poole J，Sayce M，Stokes V，Taylor P，Tubby I（2007）最终报告：杨树和柳树能源更新型产量模型。报告提交给DTI（B/W2/00624/00/00）。编辑：T. Randle和I. Tubby。归属声明：如用于任何后续产品（包括论文和报告），请引用森林研究作为数据来源。