摘要
【目的】为藏东南地区农、林业土地资源的合理利用和可持续管理提供科学依据.【方法】采用标准取样法分层(0~10、10~20、20~40、40~60、60~100 cm)采集尼洋河下游流域森林、草地和农田3种不同土地利用方式下的土壤样品,研究不同土地利用方式对土壤性质的影响.【结果】土壤温湿度共同影响着土壤性质.农田、草地和森林土壤pH值和容重均随着土层深度的增加而增加.自然森林的土壤养分含量最高,其次是农田,草地的土壤养分含量最小.3种土地利用方式的土壤有机碳和有机氮含量均随着土壤深度的增加呈减小的趋势,且土壤有机碳和有机氮的表聚性较明显.相比于自然植被,农田种植导致土壤有机碳含量显著降低8.5%~15.3%,有机氮含量显著降低11.1%~11.7%.【结论】为促进尼洋河区域土地质量的改善,可以通过改变土地利用模式的手段来改良土壤.
【Objective】To provide scientific basis for rational utilization and sustainable management of agricultural and forestry land resources in southeast Tibet.【Method】Soil samples were stratified by standard sampling method(0~10,10~20,20~40,40~60 cm and 60~100 cm)in the lower reaches of Niyang River basin under three different land use of forest,grassland and farmland.The effects of different land use on soil properties were studied.【Result】Soil temperature and humidity affected soil properties together.The pH value and bulk density of farmland grassland and forest soil increased with the increase of soil depth.Natural forest had the highest soil nutrient content,followed by farmland,and grassland had the lowest soil nutrient content.Soil organic carbon and organic nitrogen contents in the three land use decreased with the increase of soil depth,and the surface aggregation of soil organic carbon and organic nitrogen was more obvious.Compared with natural vegetation,the organic carbon content of farmland was significantly reduced by 8.5%~15.3%,and the organic nitrogen content decreased by 11.1%~11.7%.【Conclusion】The change of land use is a proper way to benefit the development of soil properties and improve the soil property and quality in Niyang River basin.
作者
马和平
东主
宋小广
MA Heping;DONG Zhu;SONG Xiaoguang(Institute of Tibet Plateau Ecology,Tibet Key Laboratory of Forest Ecology in Plateau Area,Ministry of Educationc,National Key Station of Field Scientific Observation&Experiment,Tibet Agriculture and Animal Husbandry University,Nyingchi 860000,China)
出处
《甘肃农业大学学报》
CAS
CSCD
2021年第1期133-141,共9页
Journal of Gansu Agricultural University
基金
西藏自治区自然科学基金项目(XZ2019ZRG-60).
作者简介
第一作者:马和平,副教授,博士,硕士生导师,主要从事西藏高原生态和全球变化研究.E-mail:285477889@qq.com。
