有机肥、硫磺和木质素铁对碱性土壤上桑树生长和铁素营养的影响.pdf

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1、南方农业学报2011。42(5)：515—517Journalof$outhemAgriculture·515·有机肥、硫磺和木质素铁对碱性土壤上桑树生长和铁素营养的影响王腾飞4，张超兰6，龙光霞4，黎晓峰矿(广西大学a农学院；bg*t学g：南宁530005)摘要：【目的】为解决碱性土壤上桑树缺铁黄化问题提供理论依据。【方法】以桑树品种特优2号为试验材料，通过盆栽试验研究施用鸡粪有机肥、硫磺、木质素铁肥对碱性土壤pH值、铁活性及桑树生长、铁索营养的影响。【结果】施用0．6709mg硫磺后能明显降低土壤pH值，比对照降低

2、约2个单位。单施硫磺(s2)和硫磺与有机肥混施(s+0F)对桑树生长有明显的促进作用，叶片和茎总重分别比对照增加28．7％和35．9％。施用硫磺(s2)、硫磺与有机肥混施(S+OF)及铁肥与有机肥混施(Fe+0F)均能提高桑树叶片中的活性铁含量。【结论】在碱性土壤中施用硫磺和有机肥能降低土壤pH值，提高土壤中活性铁的含量，促进桑树植株生长，可以作为改善和防治广西地区桑树缺铁黄化的一种较为可行的措施。关键词：有机肥；硫磺；木质素铁；桑树；活性铁中图分类号：$888．5文献标识码：A文章编号：2095—1191(2011)

3、05--0515--03Effectoforganicfertilizer，sulfurandferrouslignosulfonateonFenutritionandgrowthofmulberryinalkalinesoilWANGTeng-fei4，ZHANGChao-lan6，LONGGuang-xia‘，LIXiao-fen98‘(4AgriculturalCollege；6EnvironmentalCollege，GuangxiUniversity，Nanning530005，China)Abstract：

4、【Objective]Thestudieswereconductedtoobservetheamelioratingeffectsoforganicfertilizers，sulfurandferrouslignosulfatecompoundsonalkalinesoilsinordertoalleviateyeUowingofmulberrycausedbyiron-deficiency．【Method]Potexperimentswel'econductedtodeterminetheeffectsofchick

5、enmanure，sulfurandferrouslignosulfonateonsoilpH，activeFe(Fe舢)content，seedlingsgrowthandFenutritionofmulberryinalkalinesoils．【Result]SoilpHreducedsignificantlyby2unitscomparedtOCK．aftertreatmentwitIl0．670∥kgsulfur．Theapplicationofsulfurandsulfur+organicfertilizer

6、showedpositiveeffectonthegrowthofmulberryseedlings，andthetotalweightofleavesandshootincreasedby28．7and35．9％，respectively，afterthetreatments．Theapplicationofsulfurwithhishdosage(0．670g／I【g)，sulfur+organicfertilizerandferrouslignosulfonate+organicfertilizerresulte

7、dinanincreaseofactiveFe(Fe“)contentinmulberryleaves．【Conclusion]Altogether，applyingsulfurandorganicfertilizerreducedthepHvaluesignificantly，andimprovedthegrowthofmulberryseedlingsandactiveFecontentofthesoil．Therefore，itsapplicationmayberecommendedformulberrypro-

8、ductioninarea8sufferingfromsoilalkalinityinducedFedeficiencyinGuangxi．Keywords：organicfertilizer；sulfur；ferrouslignosulfonate；mulberry；activeFe0引言【研究意义】桑树是广西重要的经济作物之一