不同浓度湿润剂对高寒草甸鼠害型秃斑地改良效果研究  

Study on improvement effect of different concentra⁃tions of wetting agentson alpine meadow rodent-damaged bald land

作　　者：拉毛草 董隆明 甘瑞勋 蔡斌 余涛 孙文倩 张静[1] 张志莹 花立民[1] Lamaocao;DONG Long-ming;GAN Rui-xun;CAI Bin;YU Tao;SUN Wen-qian;ZHANG Jing;ZHANG Zhi-ying;HUA Li-min(College of grassland,Gansu Agricultural University,Key Laboratory of grassland ecosystem,Ministry of education,Ministry of education,Engineering and Technology Research Center for Alpine Rodent Pests Control,National Forestry and Grassland Administration,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《草原与草坪》2024年第4期113-120,共8页Grassland and Turf

基　　金：国家自然科学基金项目(32160338);甘肃省教育厅产业支撑项目(2021CYZC-05);国家林业和草原局草地啮齿动物危害防控创新团队项目。

摘　　要：【目的】秃斑地土壤斥水性是限制其植被恢复的重要因素。降低秃斑地土壤斥水性,增加土壤持水性是植被恢复的优选措施之一。【方法】选取青藏高原东部碌曲县典型秃斑地,喷施100、200、300和450 mL/m^(3)浓度的湿润剂,以未喷施湿润剂的秃斑地为对照(CK),对比分析喷施区和对照区土壤物理性状和植物群落特征,并采用相关性分析探讨土壤因子对植物群落特征的影响,灰色关联度分析法,评价改良效果。【结果】1)不同浓度湿润剂喷施后,土壤最大持水量(MC)、毛管孔隙度(CP)和总孔隙度(TP)均大于CK(P<0.05),各浓度处理间无显著差异;2)湿润剂浓度为200 mL/m^(3)的喷施区,多年生杂类草丰富度显著大于其他浓度处理,大于CK(P<0.05);3)土壤最大持水量(MC)和毛管持水量(CC)与植物高度(ht)显著相关(P<0.05)。【结论】秃斑地喷施湿润剂可提高土壤持水能力,增加植物物种丰富度,湿润剂浓度为200 mL/m^(3)喷施效果最佳。【Objective】Soil water repellency is an important factor limiting vegetation restoration in bare land.Reducing soil water repellency and increasing soil water holding capacity are key measures foreffective vegetation res-toration【Method】A typical bald spot in Luqu County,eastern Qinghai-Tibet Plateau,was selected for the study.Wetting agents with concentrations of 100 mL/m^(3),200 mL/m^(3),300 mL/m^(3) and 450 mL/m^(3) were applied.An un-treated bald spot served as the control(CK).The study compared and analyzed the soil physical properties and plant community characteristics between the treated and control areas.Correlation analysis was used to explore the effects of soil factors on plant community characteristics,and the grey correlation analysis method evaluated the improve-ment effect.【Result】(1)After spraying different concentrations of wetting agents,the soil maximum water holding capacity(MC),capillary porosity(CP)and total porosity(TP)were significantly higher than those in the control(P<0.05),with no significant differences among the different concentrations(P>0.05).(2)In the area treatedwith 200 mL/m^(3) concentration ofwetting agent,the richness of perennial forbs was significantly higher compared to other concentration treatments and CK(P<0.05).(3)The soil maximum water holding capacity(MC)and capillary wa-ter holding capacity(CC)were significantly correlated with plant height(ht)(P<0.05).【Conclusion】Spraying wet-ting agent on bald spot can improve soil water holding capacity and increase plant species richness.A concentration of 200 ml/m^(3) is identified as the most effective for these improvements.

关 键 词：湿润剂 秃斑地 土壤物理性状 灰色关联度分析 

分 类 号：S812.2[农业科学—草业科学]