The Impacts of Simulative Warming and Adding Nitrogen on the Grassland Productivity of Alpine Meadow

doi:10.11733/j.issn.1007-0435.2015.02.016

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (2): 322-327.DOI: 10.11733/j.issn.1007-0435.2015.02.016

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The Impacts of Simulative Warming and Adding Nitrogen on the Grassland Productivity of Alpine Meadow

GUO Hong-yu^1,2, DE Ke-jia^1,2, LU Guang-xin¹, WANG Wei²

1. Qinghai University, Xining, Qinghai Province 810016, China;
2. Qinghai Academy of Animal and Veterinary Science, Xining, Qinghai Province 810016, China

Received:2014-04-21 Revised:2014-07-02 Online:2015-04-15 Published:2015-03-25

模拟增温和添加氮素对高寒草甸草地生产力影响的初步研究

郭红玉^1,2, 德科加^1,2, 芦光新¹, 王伟²

1. 青海大学, 青海西宁 810016;
2. 青海省畜牧兽医科学院, 青海西宁 810016

通讯作者: 德科加, 芦光新
作者简介:郭红玉(1989-),女,陕西延安人,硕士研究生,研究方向为高原牧草遗传育种资源研究与利用
基金资助:
农业部公益性行业(农业)科研专项 (201203007);国家自然科学基金“青藏高原草地耐低温纤维素分解真菌多样性研究”(41261064);国家自然科学基金“三江源区退化草地‘黑土滩’植物功能群时空动态与模拟模型”(41161084);青海大学综合实力提升工程建设项目“高原生态修复国际合作创新团队”(4056050601)资助

Abstract

Abstract:

To explore the response mechanism of the alpine meadow vegetation to simulative warming and adding nitrogen, the influences of simulative warming and adding nitrogen on the community species composition, productivity, and soil water content of alpine meadow were investigated under field conditions. The results showed that warming and adding nitrogen could significantly increase the total aboveground biomass of plant, the aboveground biomass of fine pastures and the average height of vegetation (P <0.05). Warming treatment was beneficial to the increases of plant species and weed biomass. For several main plants, the plant height of both warming and adding nitrogen treatment was higher than other treatments. Soil moisture decreased first, and then increased under both 0~15 and 15~30 cm. The soil moisture content of without warming and non-nitrogen addition treatment reached the highest predicting that both warming and adding nitrogen treatment could promote the growth of vegetation, but not conducive to the increase of soil moisture content.

Key words: Alpine meadow, Simulative warming, Nitrogen addition, Community characteristics, Soil moisture

摘要：

为探索高寒草地植被对模拟增温和添加氮素的响应机制,通过在野外对高寒草甸进行模拟增温和硝态氮、铵态氮的氮素添加试验,研究模拟增温和添加氮素对高寒草地群落物种组成、生产力及土壤水含量的影响.结果表明:增温和添加氮素可显著增加植物地上总生物量、优良牧草地上生物量和植被平均高度(P <0.05).增温处理能增加植物种类,且有利于杂类草生物量的增加;对几种主要植物来说,增温施氮互作下植株高度高于其他处理,土壤0～15和15～30 cm水分均先减少后增加,且都为不增温不施肥处理最高.可见增温施氮互作处理能够促进植被的生长,但不利于土壤水分的增加.

关键词: 高寒草甸, 模拟增温, 施氮, 群落特征, 土壤水分

CLC Number:

Q948.157

GUO Hong-yu, DE Ke-jia, LU Guang-xin, WANG Wei. The Impacts of Simulative Warming and Adding Nitrogen on the Grassland Productivity of Alpine Meadow[J]. Acta Agrestia Sinica, 2015, 23(2): 322-327.

郭红玉, 德科加, 芦光新, 王伟. 模拟增温和添加氮素对高寒草甸草地生产力影响的初步研究[J]. 草地学报, 2015, 23(2): 322-327.

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The Impacts of Simulative Warming and Adding Nitrogen on the Grassland Productivity of Alpine Meadow

模拟增温和添加氮素对高寒草甸草地生产力影响的初步研究

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