摘要
基于大田试验,测定了四翅滨藜(Atriplex canescens)比叶面积(SLA)、叶片N和P浓度、叶片N和P利用效率(NUEN和NUEP)等叶片性状指标,研究了燃煤烟气脱硫废弃物(简称脱硫废弃物)和几种专用改良剂添加对四翅滨藜叶片性状的影响。结果表明:二者配合施用提高了叶片SLA和N、P浓度,降低了叶片NUE;3种专用改良剂配方间,改良剂Ⅲ施用后SLA、N和P浓度提高幅度最大,表现出最低的NUE;改良剂Ⅰ的4个施用水平间,11.25t.hm-2的施用水平下四翅滨藜具有显著高的SLA、N和P浓度,表现出最低的NUE。表明脱硫废弃物和专用改良剂配合施用改善了土壤理化性质、促进了四翅滨藜叶片养分摄取、提高了其叶片光合能力。而这种作用不仅与专用改良剂的配方有关,也受专用改良剂的施用技术的影响。
Based on a field experiment,effects of the applications of flue gas desulfurization gypsum（FGDG） and krilium on the leaf traits of Atriplex canescens were investigated,including specific leaf area（SLA）,nitrogen and phosphorous contents,nutrient use efficiency of nitrogen（NUEN） and phosphorus（NUEP）.The results showed that the joint application of FGDG and krilium increased SLA,N and P contents,while decreased NUE.Among the three krilium types tested,type III had the most significant effects on SLA,N and P contents,showing the lowest NUE.For type I,among four levels tested,11.25 t·hm-2 application had the highest SLA,N and P concentrations,possibly resulting in the lowest NUE.Our findings indicated that the addition of FGDG and krilium improved soil characteristics,which might be taken advantage of plant growth directly,including the increase of N uptake and photosynthesis.These effects not only related with krilium type,but also were influenced by krilium addition technology.
出处
《西北林学院学报》
CSCD
北大核心
2013年第4期38-42,共5页
Journal of Northwest Forestry University
基金
宁夏自然科学基金资助项目(NZ1003)
关键词
碱化土壤
脱硫废弃物
专用改良剂
四翅滨藜
叶片性状
alkaline soil
flue gas desulfurization gypsum
krilium
Atriplex canescens
leaf trait
