Effects of Nitrogen Addition on Vegetation of Ligularia sibirica Degraded Grassland under Short-Term Enclosure and Grazing Conditions

doi:10.11733/j.issn.1007-0435.2023.11.034

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (11): 3551-3560.DOI: 10.11733/j.issn.1007-0435.2023.11.034

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Effects of Nitrogen Addition on Vegetation of Ligularia sibirica Degraded Grassland under Short-Term Enclosure and Grazing Conditions

ZHANG Qian-shan¹, WANG Yu-qin^1,2, SONG Mei-ling^1,2, ZHOU Rui^1,2, YU Qian-wen¹, WANG Hong-sheng^1,2

1. Qinghai Academy of Animal and Veterinary Sciences, Qinghai University, Xining, Qinghai Province 810016, China;
2. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai Province 810016, China

Received:2023-04-20 Revised:2023-06-12 Online:2023-11-15 Published:2023-12-01

短期围封和放牧条件下施氮对橐吾型退化草地植被的影响

张千山¹, 王玉琴^1,2, 宋梅玲^1,2, 周睿^1,2, 余钱雯¹, 王宏生^1,2

1. 青海大学畜牧兽医科学院/青海省畜牧兽医科学院, 青海西宁 810016;
2. 省部共建三江源生态与高原农牧业国家重点实验室, 青海大学, 青海西宁 810016

通讯作者: 王玉琴,E-mail:gsndwangyuqin@126.com;王宏生,E-mail:wanghs1967@aliyun.com
作者简介:张千山(1999-),男,汉族,安徽合肥人,硕士研究生,主要从事有害生物防治方向研究,E-mail:1024247044@qq.com
基金资助:
青海省科技厅应用基础研究项目(2023-ZJ-723)；国家自然科学基金项目(U21A20186)和青海省“高端创新创业人才计划”拔尖人才培养计划项目资助

Abstract

Abstract: Nitrogen is an important component of various substances in plants. Nitrogen addition can promote plant growth and improve forage productivity. In order to study the effects of short-term nitrogen addition on community diversity and grassland productivity of Ligularia virgaurea degraded grassland,the nitrogen addition treatment was carried out in the free grazing area and enclosure area of L.virgaurea seriously endangering grassland in this study. The changes of species importance value,vegetation diversity,density of L.virgaurea and aboveground and underground biomass of plants in two years were analyzed. The results showed that the important values of Graminae increased significantly after nitrogen addition. Short-term enclosure and nitrogen addition had no significant effect on the diversity of the degraded grassland. Enclosure with nitrogen addition had a significant effect on the aboveground biomass of Gramineae,total underground biomass and the underground biomass of 0~10 cm soil layer (P<0.05). There was no significant interaction between treatments and years. According to the comprehensive score of principal component,nitrogen addition on the free grazing grassland could effectively enhance the score of grassland. The results could provide a theoretical basis for the management and restoration of L. virgaurea degraded grassland.

Key words: Nitrogen addition, Ligularia virgaurea, Species diversity, Biomass

摘要： 氮素是植物体内各种物质的重要组成部分，添加氮素能促进植物生长，提高牧草生产力。为研究短期氮素添加对黄帚橐吾(Ligularia virgaurea)型退化草地群落多样性及草地生产力的影响，本研究在黄帚橐吾严重危害草地的自由放牧区和围封区进行氮素添加处理，分析了2年内物种重要值、植物多样性、黄帚橐吾密度以及植物地上、地下生物量的变化规律。结果表明：添加氮素后禾本科植物重要值明显升高，短期围封和氮素添加对黄帚橐吾型退化草地的多样性无显著影响；围封条件下添加氮素对禾本科地上生物量、总地下生物量以及0~10 cm地下生物量影响显著(P<0.05)；处理和年份之间无明显交互作用。通过主成分综合得分得到在放牧草地添加氮素可以有效提高草地得分，该结果可为黄帚橐吾型退化草地的治理恢复提供一定理论依据。

关键词: 氮素添加, 黄帚橐吾, 物种多样性, 生物量

CLC Number:

S812.4

ZHANG Qian-shan, WANG Yu-qin, SONG Mei-ling, ZHOU Rui, YU Qian-wen, WANG Hong-sheng. Effects of Nitrogen Addition on Vegetation of Ligularia sibirica Degraded Grassland under Short-Term Enclosure and Grazing Conditions[J]. Acta Agrestia Sinica, 2023, 31(11): 3551-3560.

张千山, 王玉琴, 宋梅玲, 周睿, 余钱雯, 王宏生. 短期围封和放牧条件下施氮对橐吾型退化草地植被的影响[J]. 草地学报, 2023, 31(11): 3551-3560.

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Effects of Nitrogen Addition on Vegetation of Ligularia sibirica Degraded Grassland under Short-Term Enclosure and Grazing Conditions

短期围封和放牧条件下施氮对橐吾型退化草地植被的影响

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