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时间:2020-06-04
《钠复合肥促进荒漠植物梭梭、白刺和红砂生长并增强其抗旱性.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第49卷第5期兰州大学学报(自然科学版)、,01.49No.52013年10月JournalofLanzhouUniversity(NaturalSciences)Oct.2013文章编号:0455—2059(2013)05—0666—09钠复合肥促进荒漠植物梭梭、白刺和红砂生长并增强其抗旱性岳利军,马清,周向睿,王沛,王锁民兰州大学草地农业科技学院,草地农业生态系统国家重点实验室,兰州730020摘要:采用荒漠土壤,以盆栽的方式,探讨了钠复合肥在梭梭、白刺和红砂等荒漠植物生长和抗旱性中的作用.正常浇水11~12周后停止浇水20~22天,与不施肥相比,施用钠复合肥使梭梭同化枝的面
2、积、鲜重、干重和含水量分别显著增加了79%,148%,100%,25%,根的鲜重和干重分别显著增加了63%,45%;使白刺叶的面积、鲜重、干重和含水量分别显著增加了209%,318%,218%,34%,根的鲜重、干重和含水量分别显著增加了217%,138%,43%;使红砂叶的面积、鲜重、干重和含水量分别显著增加了763%,800%,667%,34%,根的鲜重和干重分别显著增加了719%,628%.施用钠复合肥显著增强了干旱胁迫下3种植物的渗透调节能力和活性氧清除能力,从而提高了这些植物的抗旱性并促进了其生长.关键词:钠复合肥;荒漠植物;抗旱性中图分类号:$725.5文献标识码:A
3、SodiumcompoundfertilizerinimprovingthegrowthanddroughtresistanceofdesertplantsHalaxylonammodendron,NitvariatangutorumandReaumuriasoongoricaYUELi-jun.MAQingZHOUXiang—ruiWANGPeiWANGSuo—minSchoolofPastoralAgricultureScienceandTechnology,StateKeyLaboratoryofGrasslandAgro-ecosystemsLanzhouUniversi
4、ty,Lanzhou730020,ChinaAbstract:Therolesofsodiumcompoundfertilizer(SF)inthegrowthanddroughtresistanceofdesertplantsHalaxylonammodendron,NitrariatangutorumandReaumuriasoongoricawereinvestigatedbyusingpotswithdesertsoils.Whenwaterwaswithheldfor20~22daysaftertheplantsgrowingundersuficientwatersup
5、plyconditionfor11~12weeks,acomparisonwithnofertilizertreatmentshowedthattheadditionofSFsignificantlyincreasedthephot0synthesizingbrancharea,freshweight,dryweightandwatercontentby79%,148%,100%,25%,respectively,andincreasedrootfreshweightanddryweightby63%and45%forH
6、ammodendron.SFsignificantlyin
7、creasedleafarea,freshweight,dryweightandwatercontentby209%,318%,218%,34%,respectively,andincreasedrootfreshweight,dryweightandwatercontentby217%,138%,43%jrespectively,fortangutorum.SFsignificantlyincreasedR.soongoricaleafarea,freshweightjdryweightandwatercontentby763%I800%,667%,34%,respective
8、ly,andincreasedrootfreshweightanddryweightby719%and628%forR.soongorica.SFcouldimprovethegrowthanddroughtresistanceoftheseplantsbyenhancingtheirosmoticadjustmentandreactiveoxygenspecies—scavengingcapability.Keywords:sodiumcompoundfertilizer;de
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