简介：

简介：Potassiumchloride,Na-pyrophosphate,CuCl2,NH4-oxalate,dithionit-citrate-bicarbonate(DCB)andNa-citratesolutionswereemployedtoetractaluminum(Al)andiron(Fe)sequentiallyandseparatelyfrom15acidicsoilslocatedattheMangshanMountains,HunanProvince,China,ManyevidencesshowedthatseparatepyrophosphateextractedmainlyKCl-extractableAl,organo-AlcomplexesandsomeinorganicAlcompounds,whereasseparateCuCl2extractedKCl-extractableAlandsomeorgano-Alcomplexes,CuCl2extractedmuchlessamountsofAlthanpyrophosphatedidfromthesoils.SeparateoxalatedidnotextractallKCl-pyrophosphate-CuCl2-oxalateseuentiallyextractableAlandFe,Also,separateDCBdidnotextractallKCl-pyrophosphate-CuCl2-oxalate-DCBsequentiallyextractableAl.TheformsofAlextactedbyoxalateandDCBfromthesoilsweremajorlynoncrystalline.Theinterlayeredmaterialsof1.4-nmintergrademineralsofthesoilswereattributedmainlytohydroxyAlpolymers.

简介："海丰28号"是由花培品系"96-1-6"和自交系"F-51-2"杂交配制而成的羊角辣椒杂交一代.其中母本花培品系"96-1-6"是通过花药培养从"湘研6号"中获得的.该杂交种果实粗羊角,顺直,果面光滑,果色浅绿,果味微辣.果长21～23cm,果宽3.6～3.8cm,平均单果重60g左右,早期座果集中.从定植到采收约需50d左右,适应性较强,一般每667m2产鲜椒3500kg左右.经过种试示范,适合我国大部分地区的露地或保护地栽培.

简介：

简介：MicrometeorologicalandmicroplotexperimentswereconductedinthefieldoffreshlyharvestedgreencaneinQueensland,Australia.ResultsshowedthathighammonialossoffertilizerNcouldoccurunderrelativelydryconditionswhenureaorcommercialproductofmixtureofureaandmuriateofpotashwereappliedtothesurfaceofsugarcanetrash.ThemoisturecontentinthetrashandthepHoffertilizerweretwoimportantfactorscontrollingtheprocessesofureahydrolysisandammoniavolatilization.MostoftheNinthesoilwastransformedtothenitratel-nitritefromafter70daysoffertilizerapplication.Nosignificantleachingwasfound.Urea-freeNfertilizershadhigherNrecoveriescomparedtourea-containingfertilizers.

简介：本标准条文中4．2．2、10．1、10．4是强制性条文，其余条文是推荐性条文。本标准由汕头市质量技术监督局、汕头市林业局提出。本标准起草单位：汕头市林业科学研究所、潮阳市农业局、潮阳市西胪镇。本标准主要起草人：詹潮安、辛如如、林文君、黄建宏、廖芝耀。

简介：

简介：由于全球稳定的市场需求拉动，马来西亚木材及木制品出口额2005年可望突破去年53亿美元的历史最高记录。据马来西亚种植业和日用品部副部长DatukAnifahAman介绍：今年前6个月，马来西亚已出口价值达28亿美元的林产品，与去年同期出口额24亿美元相比，增长了14．2％。