Abstract

Variation in fine root biomass (FRB) and turnover rate (TOR) were examined in four land use systems at two altitudes by using ingrowth core method. The aim of the study was to analyse the effect of altitude, depth and distance from tree stem on FRB and TOR. Significant variations (p < 0.05) were observed among land use systems, over seasons, depth and distances from the tree stem. The FRB varied between 47.09 and 528.59 kg ha^–1. It was maximum in agri-horticulture (AH) system in bhabhar region and in homegarden (HG) system in hill region. In each land use system at both the altitudes FRB was maximum at uppermost layer (0‒20 cm) during rainy season at 50 cm distance from tree stem while, TOR did not showed any particular trend with soil depth and distance from the tree bole. FRB and turnover rate showed significance correlation with distance from tree bole at both the altitudes i.e. (r² = 0.898 for low and r² = 0.899 for high altitude).

中文翻译：

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印度喜马拉雅山中部不同土地利用系统细根生物量的空间和季节格局及周转率

摘要

使用向内生长核心方法，在两个海拔高度的四个土地利用系统中研究了细根生物量（FRB）和周转率（TOR）的变化。该研究的目的是分析海拔，深度和距树茎的距离对FRB和TOR的影响。在不同季节，深度和距树茎的距离之间，土地利用系统之间存在显着差异（p <0.05）。FRB在47.09和528.59 kg ha ^–1之间变化。在bhabhar地区的农业园艺（AH）系统和在丘陵地区的家庭园艺（HG）系统中，该比例最高。在两个海拔高度的每个土地利用系统中，雨季在距树茎50 cm处的最上层（0‒20 cm）处，FRB都最大，而TOR对土壤深度和距树苗的距离并没有表现出任何特殊趋势。在两个海拔高度，FRB和周转率均与距树的距离呈显着相关性（低海拔处r ² = 0.898 ，高海拔处r ² = 0.899）。