纳帕海湿草甸和沼泽化草甸植物群落生物量分配差异及养分机制研究
收稿日期: 2024-11-21
修回日期: 2025-01-14
网络出版日期: 2025-08-06
基金资助
国家自然科学基金“生殖繁殖和营养繁殖在亚高山湿草甸空斑定植过程中的作用与动态及其机制研究”(32160272);云南省重点研发计划“典型高原湖泊湿地生态修复关键技术研发与示范”(202203AC100002-03);云南省“兴滇英才支持计划”青年人才项目“滇西北典型高原湖沼湿地退化梯度植被恢复过程中土壤种子库的作用及其机制研究”(XDYC-QNRC-2023-0212)
Biomass allocation and nutrient dynamics in plant communities of Napahai wet and swamp meadows
Received date: 2024-11-21
Revised date: 2025-01-14
Online published: 2025-08-06
毕晓婷 , 杨浚恒 , 崔海军 , 宋维峰 , 赵旭燕 , 王婷婷 , 普靖媛 , 元素瑶 . 纳帕海湿草甸和沼泽化草甸植物群落生物量分配差异及养分机制研究[J]. 林草资源研究, 2025 , 0(1) : 48 -57 . DOI: 10.13466/j.cnki.lczyyj.2025.01.006
Wet meadows and swamp grasslands of Napahai Lake in the northwestern plateau of Yunnan were examined to assess the impact of short-term grazing exclusion on biomass allocation and soil physicochemical properties.Field sampling and laboratory experiments were conducted,and one-way ANOVA was used to compare the differences in biomass allocation characteristics and soil properties between the two grasslands.Redundancy analysis,Monte Carlo tests,and Pearson correlation analysis were employed to explore the relationship between soil physicochemical properties and biomass allocation.The results indicate that:1)There is a highly significant difference(P=0.001)in biomass allocation between swamp grasslands and wet meadows,with swamp grasslands having significantly higher belowground biomass(BGB)and total biomass(TB),and root-to-shoot ratio(R/S),compared to wet meadows(P<0.05),while aboveground biomass(AGB)showed no significant difference.2)Soil total carbon(TC),total organic carbon(TOC),inorganic carbon(IC),ammonium nitrogen(AN),electrical conductivity(EC),and soil volumetric water content(SVWC)were significantly higher in swamp grasslands(P<0.05),where as soil pH and available potassium(AK)were significantly lower(P<0.05),with no significant differences in soil total nitrogen(TN),total phosphorus(TP),total potassium(TK),and available phosphorus(AP).3)Soil TC was significantly positively correlated with BGB and TB(P<0.05),soil TK with AGB(P<0.05),and soil AK with BGB and TB negatively correlated(P<0.05).These findings reveal significant differences in biomass allocation between Napahai Lake wet meadows and swamp grasslands,with TC,TK and AK being closely correlated with biomass allocation characteristics.
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