Short-term Effects of Nitrogen Deposition on Soil Physical and Chemical Properties of Alpine Shrub Meadow in Tibet

doi:10.11733/j.issn.1007-0435.2017.05.010

Acta Agrestia Sinica ›› 2017, Vol. 25 ›› Issue (5): 973-981.DOI: 10.11733/j.issn.1007-0435.2017.05.010

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Short-term Effects of Nitrogen Deposition on Soil Physical and Chemical Properties of Alpine Shrub Meadow in Tibet

YE Yan-hui^1,2, LIU Yun-long¹, HAN Yan-ying¹, SHAO Xiao-ming², TANG Duo-teng¹, YANG Kai-jun¹

1. Xizang Agriculture and Animal Husbandry College, Linzhi, Tibet 860000, China;
2. China Agricultural University, Beijing 100193, China

Received:2016-12-14 Revised:2017-08-01 Online:2017-10-15 Published:2018-01-25

氮沉降对西藏高山灌丛草甸土壤理化性质的短期影响

叶彦辉^1,2, 刘云龙¹, 韩艳英¹, 邵小明², 唐铎滕¹, 杨开军¹

1. 西藏农牧学院, 西藏林芝 860000;
2. 中国农业大学, 北京 100193

通讯作者: 韩艳英,E-mail:hanyanying3554@126.com
作者简介:叶彦辉(1980-),男,河南临颍人,研究方向为森林土壤学,E-mail:yeyanhui3554@126.com
基金资助:
国家自然科学基金项目（31360119，31460112）；西藏农牧学院大学生创新性实验项目（2015）资助

Abstract

Abstract:

Nitrogen deposition has become a global environmental problem. In order to better understand the effect of nitrogen deposition on soil physical and chemical properties of alpine shrub meadow, four deposition contents of artificial simulated nitrogen were carried out in July 2014 in Zhuqu Deng village:0 kg·hm²·a^-1 (CK), 25 kg·hm²·a^-1 (LN), 50 kg·hm²·a^-1 (MN), and 150 kg·hm²·a^-1 (HN), respectively. NH₄NO₃ was used as nitrogen source and sprayed every month. After 1 year of simulated nitrogen deposition, the effect of nitrogen deposition on soil physical and chemical properties in 0~20 cm and 20~40 cm soil layer was discussed. The results showed that the simulated nitrogen deposition had a significant effect on the contents of organic matter, total N, total P, total K, available N, available P, available K, exchangeable Ca²⁺, exchangeable Mg²⁺ and soluble organic carbon (P <0.05). Under the same treatment, the contents of organic matter, total N, available N, available P, available K, exchangeable Ca²⁺ and soluble organic carbon decreased with the increase of soil depth. Total P and K increased with the increase of soil layer. In general, nitrogen treatment significantly increased the contents of organic matter, N, P, K, exchangeable Ca²⁺ and soluble organic carbon of 20~40 cm soil, but had little effect on 0~20 cm soil layer.

Key words: Nitrogen deposition, Linzhi county in Tibet, Alpine shrub meadow, Soil nutrients, Dissolved organic carbon

摘要：

氮沉降已经成为全球性的环境问题，为了更好地了解氮沉降对高山灌丛草甸土壤理化学性质的影响，2014年7月，在西藏林芝县布久乡朱曲登村开展人工模拟氮沉降试验，设置4种氮沉降量：对照（CK），0 kg·hm²·a^-1；低氮（LN），25 kg·hm²·a^-1；中氮（MN），50 kg·hm²·a^-1；高氮（HN），150 kg·hm²·a^-1。以NH₄NO₃作为氮源，每月以溶液方式对草地进行喷施，在模拟氮沉降1年后，采集0～20 cm和20～40 cm土层的土壤，探讨了氮沉降对土壤理化性质的影响。结果表明：不同程度模拟氮沉降对草地有机质、全N、全P、全K、速效N、速效P、速效K、交换性Ca²⁺、交换性Mg²⁺的含量以及可溶性有机碳的含量都有显著影响（P<0.05）。在相同处理下，有机质、全N、速效N、速效P、速效K、交换性Ca²⁺和可溶性有机碳含量均随土层的加深而减少，全P和全K含量随土层的加深而增加。总体上，氮处理显著增加了20～40 cm土壤的有机质、N、P、K、交换性Ca²⁺和可溶性有机碳的含量，对0～20 cm土壤的影响较小。

关键词: 氮沉降, 西藏林芝, 高山灌丛草甸, 土壤养分, 可溶性有机碳

CLC Number:

S151.9

YE Yan-hui, LIU Yun-long, HAN Yan-ying, SHAO Xiao-ming, TANG Duo-teng, YANG Kai-jun. Short-term Effects of Nitrogen Deposition on Soil Physical and Chemical Properties of Alpine Shrub Meadow in Tibet[J]. Acta Agrestia Sinica, 2017, 25(5): 973-981.

叶彦辉, 刘云龙, 韩艳英, 邵小明, 唐铎滕, 杨开军. 氮沉降对西藏高山灌丛草甸土壤理化性质的短期影响[J]. 草地学报, 2017, 25(5): 973-981.

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Short-term Effects of Nitrogen Deposition on Soil Physical and Chemical Properties of Alpine Shrub Meadow in Tibet

氮沉降对西藏高山灌丛草甸土壤理化性质的短期影响

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