LBA-ECO ND-02 Secondary Forest Small Stem, Non-Woody Biomass, Para, Brazil: 1999-2005

This data set reports biomass from small stems and non-woody vegetation measured from 1999 to 2005 in plots of a secondary-growth forest fertilization experiment. The study location was Fazenda Vitoria, 6.5-km northwest of the town of Paragominas, Para, Brazil, in a 6-year old secondary-growth forest. Vegetation life-forms with diameters less than or equal to 2 cm (grasses, herbs, vines and dead material) were destructively sampled in November 1999, June 2000, June 2001, July 2003, July 2004, and July 2005. All data are provided in a single comma-separated file.

The site was divided into three blocks with four treatment plots (each 20m x 20m) located in each block (3 reps x 4 treatments = 12 plots). Three of the twelve plots were fertilized with nitrogen (100 kg N/ha as urea), three were fertilized with phosphorus (50 kg P/ha as superphosphate), three were fertilized with both nitrogen and phosphorus. The remaining three plots were not fertilized and served as the experimental control.

本数据集记录了自1999年至2005年间，在位于巴西帕拉州帕拉哥明纳斯镇西北6.5公里处的法赞达维托里亚地区，一个六龄次生林样地内，对小型树干及非木本植被生物量进行的测量结果。研究地点位于一个6岁的次生林中。植被类型直径小于或等于2厘米（包括草本、草本植物、藤本植物及死亡物质）于1999年11月、2000年6月、2001年6月、2003年7月、2004年7月及2005年7月进行了破坏性采样。所有数据均以单个逗号分隔的文件形式提供。研究场地被划分为三个区块，每个区块内设有四个处理样地（每个样地面积为20m x 20m），共计12个样地（3次重复 x 4种处理 = 12个样地）。其中12个样地中的3个施加了氮肥（尿素，每公顷100公斤氮），3个施加了磷肥（过磷酸钙，每公顷50公斤磷），另外3个样地同时施加了氮肥和磷肥。剩余的3个样地未施加肥料，作为实验对照组。