简介：ThesoilsinSouthChinaseaIslands(SCSI)weredividedintothreetypes,nmaely,phospho-calcsoils,skeletisolsandcoasticsolonchake,whichwerederivedfrombio-clasticandstronglycalcareoussediments.Incomparisonwiththeirparentmaterials,thephospho-CalcsoilshavehighercontentsofP,ZnCu,Ba,andCd,whichtendtoincreasegraduallywithtime,andlowercontentsofMg,Ca,Sr,B,V,Pb,andMo,whichtendtodecreasebydegreeswithtime,Theabove-mentionedconstituentsinskeletisolsandcoasticsolonchaksaresimilartothoseintheirparentmaterialsexceptforPandNa,Thefactorsaffectingelementdistributionaremainlyspecialbioclimateandparentmaterial,meanwhile,resultingintheremakableinfluenceonelementdistributionthroughsoil-formingtime.

简介：Acidsulfatesoils(ASS)containconsiderableamountsofreducedsulfurcompounds(mainlypyrite)whichproducesulfuricacidupontheiroxidation.ASS-derivedenvironmentaldegradationwidelyoccursinthecoastallowlandsaroundtheworld,especiallyinthetropicalandsubtropicalareas.ThepresenceofASSiuntheSouthChinahasbeenrecognizedbuttheirdistributionmaybelargelyunderestimatedbecausethesoilsurveydataconcerningASSarebasedonunreliablemethodsandtechniques.ASSintheSouthChinahavebeentraditionallyusedforricecultivationandthispracticehasbeenprovedsustainableifappropriateimprovementmeasuresareadopted.Recently,therapideconomicgrowthintheregionhasresultedinintensifiedcoastaldevelopmentwhichfrequentlyinvolvesactivitiesthatmaydisturbASS,Constructionofroads,foundationsandaquaculturepondsmaycausetheexposureofASStoairandbringaboutsevereenvironmentalacidificvation.Thereiscurrentlyinsufficientawarenessoftheproblemsamongtheresearchers,policy-makersandlandmanagersintheSouthChina.MoreattentionmustbepaidtothepossibleASS-dervivedenvironmentaldegradationinordertoensureasustainabledevelopmentofthecoastallowlandsintheSouthChinaregion.

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简介：Bt玉米叶垃圾的化学作文上的基因修正的非计划中的效果可以在它的分解上有影响。在在南非的很农业的系统，玉米垃圾是任何一个留在土壤表面上或在耕种期间合并了到土壤。用三个玉米混血儿(DKC80-12B，DKC80-10和DKC6-125)的叶垃圾，一个litterbag实验在堡垒兔研究农场的大学被执行，南非，为了在玉米叶的分解上决定基因修正的效果，乱丢东西什么时候在在7月和11月之间的地条件下面留在土壤表面上，正常休闲时期，在2008。另一个litterbag实验在堡垒兔研究农场的大学被进行，使用南非遗传上与cry1Ab修改了的二个玉米混血儿的叶垃圾并且Zanyokwe灌溉计划，基因(MON810)，DKC75-15B和PAN6Q-308B，和他们的相应近的isolines，CRN3505和PAN6Q-121。在崽的Cry1Ab蛋白质的降级，适用表面、合并土壤，也被调查。当在表面上适用时并且当合并了到土壤时，Bt玉米垃圾的分解类似于non-Bt玉米垃圾的。合并土壤的垃圾，以及它的Cry1Ab蛋白质，比在表面上适用的快分解了。叶崽C:PAN6Q-308B和PAN6Q-121的N比率在整个学习是类似的，而那些在一个12星期的时期期间由类似的数量DKC75-15B和CRN3505衰退了。这些调查结果建议与MON810事件，Bt玉米的叶垃圾的那分解没被玉米影响基因修正，并且Cry1Ab蛋白质不管崽是否在土壤表面上被使用或合并了到土壤在冬季休闲期间和植物叶垃圾垮掉。