摘要
苦豆子是伊犁河谷典型的毒害草之一.为了阐明苦豆子入侵对草地土壤生态环境的影响,以伊犁河谷山地草原不同海拔高度(海拔1220 m、1440 m、1660 m)中苦豆子入侵程度不同的根际土壤为研究对象,采用野外样地调查及室内实验分析的方法,研究不同海拔苦豆子入侵对伊犁河谷山地草原土壤养分及活性有机碳组分的影响.研究结果表明,随着海拔梯度的升高,土壤硝态氮含量增加.3个海拔高度下,裸地中土壤铵态氮含量随海拔升高而增大.在苦豆子轻度入侵中,铵态氮含量的大小顺序为海拔1660 m>1220 m>1440 m.在苦豆子中度入侵中,铵态氮含量的大小顺序为海拔1440 m>1220 m>1660 m.在苦豆子重度入侵中,铵态氮含量的大小顺序为海拔1660 m>1220 m>1440 m,苦豆子的入侵对铵态氮影响很大.不同海拔裸地土壤速效磷含量为1660 m>1220 m>1440 m;苦豆子轻度入侵土壤速效磷随着海拔梯度的升高呈现上升趋势,为1660 m>1440 m>1220 m;而不同海拔苦豆子中度入侵土壤速效磷呈现下降趋势,为1220 m>1440 m>1660 m.土壤速效氮随着海拔梯度的升高呈现递减趋势,为1660 m>1440 m>1220 m.土壤速效钾随着海拔的升高呈现上升趋势,为1220 m>1440 m>1660 m.在3个海拔下,0—10 cm土层苦豆子轻度入侵、中度入侵、重度入侵土壤含水量分别比裸地增加了1%、7%、 16%,11%、14%、17%,4%、2%、11%;在10—20 cm土层土壤含水量增加了4%、4%、13%,10%、7%、12%,32%、40%、48%.随着海拔升高土壤有机碳组分中易氧化有机碳和可溶性有机碳含量均出现明显升高的趋势.
Sophora alopecuroides is one of the typical poisonous grasses in the Yili Valley. In order to clarify the impact of the invasion of Sophora alopecuroides on the grassland soil ecology in this area, rhizosphere soils of the Sophora alopecuroides of different intrusion degrees at different altitude gradients in the mountain grassland(1220 m, 1440 m, 1660 m above sea level) were chosen as the study object. The soil nutrients and active organic carbon components were analyzed using sample-plot survey and laboratory analysis. The results showed that the soil nitrate nitrogen content increased with the increasing altitude. For the three altitude gradients, the content of ammonium nitrogen in the bare soil increased along the increase of altitude. In the mild invasion, the order of ammonium nitrogen content was 1660 m>1220 m>1440 m. In the moderate invasion, the order of ammonium nitrogen content was 1440 m>1220 m>1660 m. In the severe invasion, the order of ammonium nitrogen content was 1660 m>1220 m>1440 m, and the intrusion of Sophora alopecuroides had a great influence on soil ammonium nitrogen content. The order of available phosphorus content in soil of bare land at different altitude gradients was 1660 m>1220 m>1440 m. The available phosphorus in soil of slight intrusion increased with the increasing of altitude, which was 1660 m>1440 m>1220 m. However, the available phosphorus in soil of the moderate intrusion showed a decreasing trend along the increasing of altitude, which was 1220 m>1440 m>1660 m. The soil available nitrogen showed a decreasing trend with the increasing of altitude, which was 1660 m>1440 m>1220 m. Soil available potassium increased with the increasing of altitude, which was 1220 m>1440 m>1660 m. For the soil water content of the three altitudes, the soil water content of the slight intrusion, moderate intrusion and severe invasion increased by 1%, 7%, 16%, 11%, 14%, 17%, 4%, 2% and 11% in the 0—10 cm soil layer, respectively. The soil water content in the 10—20 cm soil layer increased by 4%, 4%, 13%, 10%, 7%, 12%, 32%, 40%, 48%, respectively. With the increasing of altitude, the content of easily oxidized organic carbon and soluble organic carbon increased significantly.
作者
王晓龙
崔东
杨海军
闫俊杰
曹文秋
刘海军
张静
沙吾丽
WANG Xiaolong;CUI Dong;YANG Haijun;YAN Junjie;CAO Wenqiu;LIU Haijun;ZHANG Jing;SHA Wuli(College of Biology and Geography Science,Yili Normal University,Yining,835000,China;Institute of Resources and Ecology,Yili Normal University,Yining,835000,China;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,830011,China)
出处
《环境化学》
CAS
CSCD
北大核心
2021年第4期1232-1242,共11页
Environmental Chemistry
基金
新疆维吾尔自治区高校科研计划项目(XJEDU2018Y042)资助。
关键词
伊犁河谷
植物入侵
苦豆子
海拔
土壤养分
活性有机碳
Yili valley
plant invasion
Sophora alopecuroides
elevation
soil nutrient
active organic carbon
