藏北高原土壤和植物硫含量及其与牦牛硫营养需求的关系  

Relationships between sulphur status of soils and plants and its requirements of ruminants in the northern Tibetan Plateau

作　　者：孙建平 阿旺 吕汪汪 刘云霞 贾跃凤 斯确多吉[1] 汪诗平[1] SUN Jian-ping;A Wang;LYU Wang-wang;LIU Yun-xia;JIA Yue-feng;TSECHOE Dorji;WANG Shi-ping(State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Ti-betan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;Tibet Low Carbon Grass and Animal Husbandry Technology Co.,Ltd.Lasa 850001,Tibet;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院青藏高原研究所青藏高原地球系统、资源环境国家重点实验室,北京100101 [2]西藏低碳草牧科技有限公司,西藏拉萨850000 [3]中国科学院大学,北京100094

出　　处：《草原与草坪》2025年第1期8-14,共7页Grassland and Turf

基　　金：西藏自治区科技厅重点研发计划(XZ202201ZY0012N);西藏自治区那曲市区域科技协同创新专项“幼龄牦牛产绒性能提升技术研究与示范”。

摘　　要：【目的】探究藏北高原植物和土壤硫含量能否满足放牧家畜生长和生产对硫营养的需求。【方法】通过对藏北高原4种主要高寒草地类型13种主要植物、群落以及土壤全硫含量的分析,结合主要放牧家畜牦牛硫营养需求标准,综合评价了高寒草地硫的营养状况。【结果】4种主要高寒草地0~10 cm土壤中有机硫的含量变化很大,平均为0.01%~0.20%,有机硫的含量与土壤中有机碳和全氮含量呈极显著正相关(P<0.001)。所测定的13种优势植物64个样品中,有70%的植物体内硫含量低于0.16%,有90%以上的植物氮∶硫比大于14。【结论】与主要放牧家畜牦牛的硫营养需要相比,约有70%~90%的植物缺硫,说明青藏高原北部植物硫元素含量普遍较低,可能限制了家畜的生产性能,未来亟需对放牧动物的硫营养需求进行评估。【Objective】This study aims to assess whether the sulfur content of plants and soils of the northern Ti⁃betan Plateau meets the sulfur nutrition requirements for growth and production of grazing livestock.【Method】The sulphur content in the main plants,plant communities,and soils of 4 alpine steppes were investigated.The sulfur nutri⁃ent status of these alpine steppes was evaluated in relation to the sulfur requirements of the primary livestock specie,【Result】The mean organic sulphur content ranged from 0.01%to 0.20%in the 0~10cm soils,A strong positive correlation was found between the ratio of nitrogen⁃to⁃sulphur(N∶S)in soils and in plants,The sulfur content of 70%of the plants was lower than 0.16%,and more than 90%of the plants had an N∶S ratio greater than 14.【Con⁃clusion】More than 70%~90%of the plants were sulfur⁃deficient for grazing livestock,suggesting that sulphur defi⁃ciency is widespread in the northern Tibetan Plateau.This deficiency limits the production performance of livestock.Future evaluations of sulphur nutritional requirements for grazing animals are recommended.

关 键 词：藏北高原高寒草地 土壤 植物 硫含量 放牧家畜 硫营养需求 

分 类 号：S812[农业科学—草业科学]