摘要
以红壤为研究对象,施用硫磺和硫酸钾肥料(S0-S和SO42--S)进行盆栽油菜试验,探讨硫的转化与生物有效性以及对油菜生长、养分吸收和分配的影响。研究结果表明:两种肥料处理的油菜生物量没有显著差异,可能与N、S代谢有关,N/S比较小不适宜造成的。从油菜吸S量来说,硫磺的效果较好。从产量构成因素的荚果数、千粒质量、产量和收获系数变化看,随着硫肥用量的增加,硫磺处理的值降低,而硫酸钾处理的值增加,表明硫磺用量可能过量而硫酸钾中有钾的作用。S促进油菜对P、Ca、Mg的吸收,而K2SO4肥料由于K的拮抗作用,对Ca、Mg吸收量减少。在土壤中,SO42--S处理土壤交换性Ca、Mg含量高于S0-S处理,表明K可以提高土壤Ca、Mg有效性。
A pot experiment with red soil was carried out in a greenhouse for studying the effects of differ-ent rates of elemental sulphur（S0-S）and potassium sulfate （SO42--S）fertilizers on the growth,nutrient uptake and distribution of oilseed rape and nutrient change in rhizosphere and non -rhizosphere soil .The result showed that there were not significantly differences between two kinds of sulphur fertilizer treatments on canola bio -mass,which maight be associated with N ,S metabolism,and inappropriate small N/S ratio.The S content ab-sorbed by rapeseed in the S 0-S fertilizer treatment was higher than that in the SO 4 2--S treatment .The values of the pod number ,kilo-grain weight ,yield and harvest index decreased with the increasing rate of S 0-S fertiliz-er,while the values increased in the SO 42--S treatment,which indicated an excess amount of S 0-S fertilizer, and the role of potassium in SO 4 2--S fertilizer.S could promote the uptake of P ,Ca,Mg The uptake contents of Ca,Mg decreased in the K 2 SO4 fertilizer treatment owing to the antagonism of K .In the soil,the contents of soil exchangeable Ca ,Mg.were higher in the SO 4 2--S fertilizer treatments than those in the S 0-S fertilizer treat-ment,which showed that K could increase the validity of soil Ca ,Mg.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2014年第2期265-271,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家自然科学基金项目(31260143)
江西农业大学博士启动经费项目(2012)
关键词
红壤
不同硫肥
油菜
生物有效性
养分吸收与分配
red soil
different forms of sulphur fertilizers
oilseed rape
bioavailability
nutrient uptake and distribution
