Impacts of arable reforestation on soil carbon and nutrients are dependent upon interactions between soil depth and tree species

IF 5.4 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2024-10-30 DOI:10.1016/j.catena.2024.108465

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引用次数: 0

Abstract

Recent interest in temperate farm woodland has focussed on strengthening delivery of ecological and economic benefits from land. However, impacts of temperate farm woodland on soil properties and carbon inventories are poorly studied. With field samples and measurements taken at 35-year-old agroforestry experiment we determine how functioning in three components of the soil column (forest floor, topsoil (0–30 cm) and subsoil (>30 cm)) respond to land-use change, tree species choice and small-scale random variability in soil properties. Tree species influenced soil nutrient dynamics in the forest floor and topsoil, with Hazel forest floor material 27 % less concentrated in phosphorus (P) but containing 50 % more soil organic carbon (SOC) stock than Cherry or Sycamore. Change in land use from arable to woodland controlled soil bulk density, organic matter content and C storage in topsoil, with 15 % (11.8 t ha⁻¹) more SOC stock in 0–30 cm soil beneath woodland compared with arable. In subsoil, tree species and land cover influence over soil functioning was insignificant. Notably, no net difference between arable and woodland soil C storage was found when the 0–50 cm part of the profile was considered as a whole, although net C storage was highly variable by plot. 35 years following planting, soil structure and SOC storage were only different in the forest floor and topsoil compared to the adjacent arable system. Each soil component therefore has its own functioning ‘signature’ in response to afforestation. Future policy support for farm woodland must account for this complexity.

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耕地植树造林对土壤碳和养分的影响取决于土壤深度和树种之间的相互作用

最近，人们对温带农田林地的兴趣集中在加强土地的生态和经济效益方面。然而，温带农田林地对土壤特性和碳库存的影响却鲜有研究。通过在有 35 年历史的农林试验中采集的实地样本和测量数据，我们确定了土壤柱的三个组成部分（林地、表土（0-30 厘米）和底土（30 厘米））的功能如何对土地利用变化、树种选择和土壤特性的小规模随机变化做出反应。树种会影响林地和表土的土壤养分动态，与樱桃树或梧桐树相比，榛树林地材料的磷（P）浓度低 27%，但土壤有机碳（SOC）储量却高出 50%。从耕地到林地的土地利用变化控制着土壤容重、有机质含量和表土中的碳储量，林地下 0-30 厘米土壤中的 SOC 储量比耕地多 15%（11.8 吨/公顷-1）。在底土中，树种和土地覆盖对土壤功能的影响微乎其微。值得注意的是，如果将剖面的 0-50 厘米部分视为一个整体，就会发现耕地和林地的土壤碳储量没有净差异，尽管不同地块的净碳储量差异很大。种植 35 年后，与邻近的耕地系统相比，只有林地和表层土壤的土壤结构和 SOC 储量有所不同。因此，每种土壤成分对植树造林都有自己的功能 "特征"。未来对农场林地的政策支持必须考虑到这种复杂性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.