东北平原14个地点杨树防护林和农田土壤全磷及其组分差异研究  

Differences of soil total phosphorus and its 9 fractions between poplar shelterbelts and adjacent farmlands in 14 locations of Northeast China Plain

作　　者：郭宇丰 曹旭东 朱美娜 杨艳波[1] 王慧梅[1] 王文杰[1,2] GUO Yufeng;CAO Xudong;ZHU Meina;YANG Yanbo;WANG Huimei;WANG Wenjie(College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,China;Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Changchun 130102,China)

机构地区：[1]东北林业大学化学化工与资源利用学院,黑龙江哈尔滨150040 [2]中国科学院东北地理与农业生态研究所,吉林长春130102

出　　处：《土壤与作物》2022年第1期62-71,共10页Soils and Crops

基　　金：课题资助来源于国家自然基金项目(41877324);中央高校项目(2572021DT03);中央高校基本科研业务费专项资金资助(2572020AW21).

摘　　要：土壤磷素差异是科学评价农田防护林土壤养分管理的基础之一。本研究在富裕、兰陵、明水、肇州、宋站、杜蒙、赤峰、通辽、奈曼、四平、长岭、白城、德惠和泰来14个地点采集杨树防护林和配对农田表层(0~40 cm)土壤样品共84个,使用Tiessen和Sui修正的Hedley磷素分级法测定土壤9种磷组分,使用配对样本T检验法研究农田、杨树防护林土壤全磷及磷组分含量差异。结果表明:(1)东北平原14地点土壤全磷范围在122~594 mg·kg^(-1),均值为266 mg·kg^(-1);9种组分中,稀盐酸无机磷(HCl-Pi)占全磷(TP)含量的52.7%,其次是氢氧化钠有机磷(NaOH-Po)占14.8%、浓盐酸有机磷(conc.HCl-Po)占11.2%,闭蓄态磷(Re-P)、浓盐酸无机磷(conc.HCl-Pi)、氢氧化钠无机磷(NaOH-Pi)占比在5%~6%之间,而水溶性磷(H2O-Pi)、碳酸氢钠无机磷(NaHCO3-Pi)、碳酸氢钠有机磷(NaHCO3-Po)占比在0.5%~3%之间。(2)杨树防护林土壤全磷含量低于对照农田20.9%,而9种磷组分中NaHCO3-Pi含量杨树防护林比农田显著降低30.9%;NaOH-Pi占比14个地点中有11个杨树防护林低于农田,配对T检验也达到显著差异。(3)占比最高的三个组分(HCl-Pi、NaOH-Po和conc.HCl-Po)是防护林相比农田土壤全磷降低的主因,其中HCl-Pi贡献54.1%。与农田相比,杨树防护林导致土壤全磷降低,但9种组分变化不尽一致;全磷及其组分含量地点间差异可达10倍甚至更高,远大于农田与杨树防护林间差异(多小于2倍)。进行大范围农田和杨树防护林间全磷含量及组分差异比较时,需要有效去除地点间差异,相关结果为东北地区防护林土壤影响评价提供了数据支持。The difference of soil phosphorus(P)is one of the guidelines for soil nutrient management of farmland shelterbelt forest.In this paper,total 84 soil samples were collected from 14 sites(Fuyu,Lanling,Mingshui,Zhaozhou,Songzhan,Dumeng,Chifeng,Tongliao,Naiman,Siping,Changling,Baicheng,Dehui and Tailai counties)in Northeast China Plain at the depth of 0~40 cm soil layer.The Hedley method modified by Tiessen and Sui was used to determine 9 P components in soil,and the paired T test was used to study the differences of total P and P components between farmland and poplar shelterbelt soil.(1)Soil total P in 14 sites ranged from 122 to 594 mg·kg^(-1),with an overall average at 266 mg·kg^(-1).In all 9 fractions,the peak was dilute hydrochloric acid inorganic phosphorus(HCl-Pi),contributing 52.7%of the total soil P(TP),followed by sodium hydroxide organophosphorus(NaOH-Po)(14.8%)and concentrated organophosphorus hydrochloride(conc.HCl-Po)(11.2%).Closed state of phosphorus storage(Re-P),concentrated hydrochloric acid inorganic phosphorus(conc.HCl-Pi)and sodium hydroxide inorganic phosphorus(NaOH-Pi)took a proportion of soil total P at 5%~6%,while water soluble phosphorus(H2O-Pi),sodium bicarbonate inorganic phosphorus(NaHCO3-Pi),sodium bicarbonate organophosphorus(NaHCO3-Po)took a proportion ranged from 0.5%to 3%.(2)On average across the 14 sites,the soil total P content in poplar shelterbelt was 20.9%lower than that in the neighboring farmland.In the nine P components,the NaHCO3-Pi in poplar forest decreased 30.9%compared with the farmland;The proportion of NaOH-Pi to total soil P in 11 out of the 14 sites was lower in poplar forests compared with farmland,and the average in poplar was significantly lower.(3)The HCl-Pi,NaOH-Po,conc.HCl-Po fractions were also the main drivers for soil total P reduction in poplar forests,and the HCl-Pi contributed 54.1%of the total reduction.Our data manifested that poplar afforestation induced soil total P reduction with different reduction among the nine fractions.Soil total P and differ

关 键 词：农田 磷分级 土壤全磷 东北平原 杨树防护林 

分 类 号：S714.2[农业科学—林学]