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作 者:王鼎 王梓璇 王昕 刘学录[1] 褚润[1] WANG Ding;WANG Zixuan;WANG Xin;LIU Xuelu;ZHU Run(College of Resources and Environment,Gansu Agricultural University,Lanzhou,Gansu 730070;Gansu Desert Control Research Institute,Lanzhou,Gansu 730071)
机构地区:[1]甘肃农业大学资源与环境学院,甘肃兰州730070 [2]甘肃省治沙研究所,甘肃兰州730071
出 处:《北方园艺》2025年第3期114-121,共8页Northern Horticulture
基 金:甘肃农业大学科研启动基金资助项目(GAU-KYQD-2020-25);甘肃省青年科技基金计划资助项目(21JR7RA852);甘肃省高校青年博士支持资助项目(2023QB-131);自然资源部高寒干旱区矿山地质环境修复工程创新中心资助项目(GSYSY20220701);陇原青年创新创业人才资助项目(2023LQGR58)。
摘 要:以甘肃省永登县树屏镇的湿陷性黄土为研究对象,设置不同保水方式(高分子保水剂、发酵性锯末、覆盖地膜)下种植抗逆灌木植物(柠条、紫穗槐)的野外边坡修复试验,结合室内测定分析,研究了土壤水盐、速效养分、有机质及灌木成活率等指标的变化趋势,以期为西北黄土边坡生态恢复提供参考依据。结果表明:在不同保水方式下,覆膜和保水剂处理对土壤水分、速效养分提升及盐碱抑制作用较为显著。其中,覆膜和保水剂处理的土壤含水量与对照相比均显著增加(P<0.05),增幅分别为34.2%和27.2%,覆膜和保水剂处理土壤电导率较对照显著降低(P<0.05),降幅分别为36.0%和40.4%;覆膜处理土壤速效磷含量为6.44 mg·kg^(-1),较对照相比增加了70.3%,锯末处理土壤有机质含量较对照相比显著增加了52.5%(P<0.05)。与对照相比,3种不同保水方式均在一定程度上提高了2种灌木的成活率,且覆膜和保水剂处理下柠条出苗率相对较好。其中,覆膜处理柠条成活率为90%,保水剂处理柠条成活率为75%。柠条的成活率高于紫穗槐,且表现出更强的抗逆能力,更适宜在类似环境中种植。A field slope restoration experiment with different water retention methods(polymer water retaining agent,fermentable sawdust,mulching film)were set up for planting drought-resistant shrubs(caragana,amorpha)in the collapsible loess of Shuping town,Yongdeng county,Gansu Province,and indoor measurements were combinedand analysed.The trends of soil water and salt,available nutrients,organic matter,and the survival rate of the shrubs and other indexes were investigated,in order to provide a reference for the ecological restoration of loess slopes in Northwest China.The results showed that,under different water retention methods,the effects of mulching film and water retention agent treatment on soil moisture,available nutrients and salt inhibition were significant.Compared with the control,the water content of soil treated with film and water retaining agent was significantly increased(P<0.05)by 34.2%and 27.2%,respectively;the conductivity of soil treated with film and water retaining agent was significantly decreased(P<0.05)by 36.0%and 40.4%,respectively.Compared with the control,the soil available phosphorus content in mulching treatment was 6.44 mg·kg^(-1),which was increased by 70.3%,and the soil organic matter content in sawdust treatment was significantly increased by 52.5%(P<0.05).Furthermore,all three water retention methods exhibited varying degrees of improvement in the survival rates of the two shrubs compared to the control.Notably,caragana showed higher survival rates under mulching and water retaining agent treatments,with a survival rate of 90%under mulching and 75%under water retaining agent treatment.Additionally,caragana displayed superior resilience and suitability for planting in similar environments compared to amorpha.
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