Distribution Characteristics of Organic Carbon in 2 m Soil Layers Under Difference Planting Types in Terraced Fields on Loess Hilly Region

doi:10.13870/j.cnki.stbcxb.2017.05.039

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Distribution Characteristics of Organic Carbon in 2 m Soil Layers Under Difference Planting Types in Terraced Fields on Loess Hilly Region

更新时间：2025-03-12

- Distribution Characteristics of Organic Carbon in 2 m Soil Layers Under Difference Planting Types in Terraced Fields on Loess Hilly Region
- Vol. 31, Issue 5, Pages: 253-259(2017)
- 作者机构：
  
  西北农林科技大学资源环境学院，农业部西北植物营养与农业环境重点实验室，陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.05.039
  CLC： S153.6+2
- Published：2017
- 稿件说明：
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Distribution Characteristics of Organic Carbon in 2 m Soil Layers Under Difference Planting Types in Terraced Fields on Loess Hilly Region[J]. 2017, 31(5): 253-259.
DOI：

Distribution Characteristics of Organic Carbon in 2 m Soil Layers Under Difference Planting Types in Terraced Fields on Loess Hilly Region[J]. 2017, 31(5): 253-259. DOI： 10.13870/j.cnki.stbcxb.2017.05.039.

摘要

为了明确黄土丘陵区梯田种植类型对0—200 cm有机碳垂直分布的影响，以甘肃庄浪县堡子沟流域玉米、小麦、土豆、苹果和间作（苹果+土豆）5种典型种植类型梯田的土壤为研究对象，分析土壤有机碳含量、储量在0—200 cm的垂直分布特征及影响因素，探讨种植类型对0—200 cm土层有机碳分布稳定性的影响。结果表明：（1）5种种植类型梯田的0—200 cm土层中，有机碳含量平均为3.33~4.86 g/kg，储量平均为8.0~11.69 t/hm2；含量和储量均在间作和苹果地显著高于玉米地、小麦地（P<0.05）；各样地有机碳含量均表现出明显的层次性，0—20 cm显著高于其他各层（P<0.05），20 cm以下的各层中的变异较小，有机碳储量的垂直分布特征与含量相同，且层次间差异更为显著。（2）土壤有机碳分配比例在0—20 cm为17.57%，20—100 cm为41.21%，100—200 cm为41.22%，种植类型对0—200 cm土层有机碳分布稳定性影响较小。有机碳分层比例SR(0—20 cm/20—40 cm)为1.51~1.78，SR(0—20 cm/40—60 cm)为1.78~2.02，表明土壤正向发育熟化，土壤质量明显提高。（3）水分能够影响有机碳垂直分布，种植类型对土壤有机碳的深层分布和固存有一定影响，苹果园的发展有利于梯田土壤有机碳的提高。

Abstract

In order to confirm the effects of planting types on the vertical distribution of soil organic carbon (SOC)

five typical planting types of terraces in the Baozigou basin located in Gansu province were studied

which included maize

wheat

potato

apple and intercropping (apple+potato). SOC content

storage and the controls were studied to investigate the effects of planting types on the stability of SOC in 0—200 cm soil layer. The results showed that: (1) The content of SOC in 0—200 cm ranged from 3.33~4.86 g/kg

and the differences among different planting types were significant; SOC in intercropping and apple were significantly higher than those in maize and wheat (P<0.05); SOC was significant different in different soil layer

and the content of SOC in 0—20 cm soil layers were significantly higher than other layers and the difference were slightly with the soil depth increased. The storage of SOC ranged from 8.0 t/hm2to 11.69 t/hm2

and the difference was more outstanding among different planting types; specifically

SOC storages in intercropping and apple were significantly higher than those in maize and wheat. (2) The distribution ratio of SOC in 0—20

20—100 and 100—200 cm accounted for 17.57%

41.21%

and 41.22%

respectively. The influences of different planting types on the stability of SOC distribution were small. Among different planting types

the ratio of the SOC storage in 0—20 cm to 20—40 cm soil layer were 1.51~1.78

0—20 cm to 40—60 cm soil layer were 1.78~2.02

which indicates that soil is developing to maturation and soil quality is significantly improved. (3) Moisture has an effect on the vertical distribution of SOC; planting types had certain influences on the distribution and the storage of SOC

the apple orchard of terraced fields in the loess hilly region had a good advantage on the improvement of soil organic carbon in the Loess Plateau.

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