NPP Grassland: Vindhyan, India, 1986-1989, R1

This data set contains four data files in text format (.txt). Three files provide above- and below-ground productivity data for three derived savannas on the Vindhyan plateau in northern India from 1986 to 1989, one file for each of three treatments. Each study site (Ranitali, Hathinala, Telburva) contains three treatment areas: ungrazed; grazed annually for 30-40 years; and grazed but temporarily fenced for 2-6 years prior to the study. The fourth file provides climate data from a weather station at Daltonganj, India, for the period 1893-1990.

Monthly dynamics of above- and below-ground biomass were measured by harvest methods in each treatment area at each site for two annual cycles (1986/1987 and 1987/1988). Additional above-ground peak biomass data (live shoot + dead shoot) for October 1988 from ungrazed and grazed plots represent the 1988/1989 annual cycle.

Annual above-ground net primary production (ANPP) was estimated using trough-peak analysis of increments in live biomass, standing dead matter, and litter. Annual below-ground production (BNPP) was estimated from biomass increments combined with root in-growth studies. Mean ANPP for the ungrazed treatment areas on the three sites ranged from 377 to 664 g/m2/yr over the 1986 to 1989 period. Mean BNPP in the same areas was estimated at 510 and 727 g/m2/yr for 1986/1987 and 1987/1988, respectively. Mean total ungrazed NPP (ANPP + BNPP) was estimated at 1,082 and 1,391 g/m2/yr for 1986/1987 and 1987/1988, respectively.

Revision Notes: The NPP data for the temporarily fenced grassland sites for the 1987/1988 annual cycle have been revised to correct previously reported BNPP estimates. Please see the Data Set Revisions section of this document for detailed information.

本数据集包含四个文本格式的数据文件（.txt）。其中三个文件提供了自1986年至1989年，位于印度北部温德亚高原上三个衍生的热带稀树草原的地上和地下生产力数据，每个处理分别对应一个文件。每个研究地点（Ranitali、Hathinala、Telburva）包含三个处理区域：未放牧区；年放牧30-40年；以及研究前临时围栏放牧2-6年的区域。第四个文件提供了印度达隆甘杰气象站1893-1990年期间的气候数据。在每个处理区域，通过收获方法在每个研究地点对地上和地下生物量进行了每月动态测量，覆盖了两个年度周期（1986/1987年和1987/1988年）。未放牧和放牧地块的地上峰值生物量数据（活枝 + 死枝）代表1988年10月的数据，这些数据构成了1988/1989年度周期。利用活生物量、地上枯死物质和凋落物的增量进行凹峰分析，估算出年度地上净初级生产力（ANPP）。通过生物量增量与根系生长研究相结合，估算年度地下生产力（BNPP）。在1986年至1989年期间，三个地点未放牧处理区域的平均ANPP在377至664克/平方米/年之间。相应地，这些区域的平均BNPP在1986/1987年和1987/1988年分别为510和727克/平方米/年。1986/1987年和1987/1988年的平均总未放牧NPP（ANPP + BNPP）分别估计为1,082和1,391克/平方米/年。修订说明：1987/1988年度周期临时围栏草地地点的NPP数据已修订，以纠正先前报道的BNPP估计。请参阅本文件的数据集修订部分以获取详细信息。