Li Yan-Zhe, Sun Zhi-Gao, Mao Li, Chen Bing-Bing, Hu Xing-Yun, Wang Xiao-Ying, Shi Zi-Xiang
Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process/Institute of Geography, Fujian Normal University, Fuzhou 350007, China.
Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process/Institute of Geography, Fujian Normal University, Fuzhou 350007, China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou 350007, China.
Ying Yong Sheng Tai Xue Bao. 2022 Apr;33(4):1003-1011. doi: 10.13287/j.1001-9332.202204.006.
We examined the effects of invasion on phosphorus forms of marsh soils, based on the method of space-for-time substitution by selecting marshes with different invasion years (SA, 5-6 years; SA, 8-10 years; and SA, 12-14 years) in Shanyutan of the Minjiang River estuary. The results showed that in marsh soils of different invasion years, the proportion of hardly decomposable phosphorus (HCl-Pi and Residual-P) was the highest (46.4%-46.7%), followed by moderately decomposable phosphorus (NaOH-Pi, NaOH-Po and Sonic-Pi) (40.0%-44.0%), and the easily decomposable phosphorus (Resin-Pi, NaHCO-Pi and NaHCO-Po) was the lowest (9.5%-13.3%). With increasing invasion years of , soil phosphorus forms and their spatial distributions were greatly altered. The contents of moderately decomposable phosphorus, hardly decomposable phosphorus, and total phosphorus (TP) generally increased, while easily decomposable phosphorus content generally decreased. Compared with SA, the contents of moderately decomposable phosphorus, hardly decomposable phosphorus and TP in SA increased by 11.5%, 9.7% and 10.5%, while those in SA increased by 24.8%, 13.2% and 13.5%, respectively. The distribution of phosphorus forms was greatly altered with increasing invasion years, which was dependent on the variations of key factors such as EC, pH value and grain composition. The implementation of regular mowing activities for in the Minjiang River estuary in recent years, to some extent, reduced the return of phosphorus from residues to soils and decreased the availability of the easily decomposable phosphorus in soils.
我们基于空间换时间替代法，通过选取闽江河口鳝鱼滩不同入侵年份（SA，5 - 6年；SA，8 - 10年；以及SA，12 - 14年）的沼泽地，研究了入侵对沼泽土壤磷形态的影响。结果表明，在不同入侵年份的沼泽土壤中，难分解磷（HCl - Pi和Residual - P）的比例最高（46.4% - 46.7%），其次是中度可分解磷（NaOH - Pi、NaOH - Po和Sonic - Pi）（40.0% - 44.0%），而易分解磷（Resin - Pi、NaHCO - Pi和NaHCO - Po）最低（9.5% - 13.3%）。随着入侵年份增加，土壤磷形态及其空间分布发生了很大变化。中度可分解磷、难分解磷和总磷（TP）含量总体增加，而易分解磷含量总体下降。与SA相比，SA中中度可分解磷、难分解磷和TP的含量分别增加了1憨稜封谷莩咐凤栓脯兢1.5%、9.7%和10.5%，而SA中分别增加了24.8%、13.2%和13.5%。随着入侵年份增加，磷形态分布发生了很大变化，这取决于诸如电导率（EC）、pH值和颗粒组成等关键因素的变化。近年来在闽江河口对实施定期割草活动，在一定程度上减少了磷从残体向土壤的归还，并降低了土壤中易分解磷的有效性。
