土壤铜胁迫对不同籼型水稻品种产量和品质的影响  

Effects of Soil Cu Stress on Grain Yield and Quality of Indica Rice cultivars

作　　者：袁玲花[1] 徐加宽[2] 颜士敏[1] 韩妍[1] 赵江宁[1] 王余龙[1] 董桂春[1] 杨连新[1] 

机构地区：[1]扬州大学江苏省作物遗传生理国家重点实验室培育点,江苏扬州225009 [2]江苏省常州市农林局,江苏常州213001

出　　处：《农业环境科学学报》2008年第2期435-441,共7页Journal of Agro-Environment Science

基　　金：江苏省社会发展科技计划(BS2006019);2007年常州市农业科技成果转化(重点项目)

摘　　要：盆栽土培条件下,以壤土为试验土壤,以6个籼稻品种(组合)为供试材料,研究土壤铜含量400mg·kg-1对水稻产量和品质的影响。结果表明,土壤铜处理使供试品种稻谷、糙米和精米产量均下降,降幅为14%￣27%,依据减产的显著性可将所有供试品种划分为不显著减产(P>0.05)、显著减产(P<0.05)和极显著减产(P<0.01)3种类型。土壤铜处理对稻米加工品质(糙米率和精米率)、外观品质(垩白米率、垩白率和垩白度)、蒸煮和食味品质(直链淀粉含量和胶稠度)以及卫生品质(铜含量)均无显著影响,但使蛋白质含量显著增加,由于子粒减产幅度明显大于蛋白质含量增加的幅度,蛋白质总量极显著降低。铜在子粒不同部位的分布差异很大,浓度分布:糠层中铜浓度大约是谷壳、精米的2倍;积累量:谷壳、糠层和精米中铜积累量平均分别占子粒总积累量的13%、12%和75%,即稻谷经精加工后,其铜总量下降1/4左右。In order to investigate the effect of soil Cu stress （400 mg·kg^-1） on the rice yield and quality, pot experiments were conducted us- ing indica rice cuhivars. Main results showed that paddy rice, brown rice and polished rice productivities were all decreased by 14%-27%. According to the significance of the decrease, it could be divided into three groups： none significantce （P〉0.05）, significantce （P〈0.05） and very significantce （P〈0.01）. Milling quality （brown rice percentage, milled rice percentage）, appearance quality （chalky grain percentage, chalkiness area, chalkiness degree）, cooking quality （amylose content, gel consistency） and sanitation quality （Cu concentration） were not sig- nificantly affected under Cu stress. The content of protein concentration of brown rice increased significantly （P〈0.05） compared with the control, but itsthe total content of protein decreased very significantly （P〈0.01） because of its more seriously decreased yield productivity. Cu concentration differed greatly in different parts of grain structure. On the concentration distribution, it was about 2-fold in cortex （embryo） than in chaff and polished rice. With regard to Cu quantities accumulated in the rice grain, about 13% of the total Cu in grain was in chaff, about 12% in cortex （embryo）, and about 75% in polished rice. So, about 1/4 of the Cu in grain was eliminated after grain processing （chaff, cortex and embryo were removed）.

关 键 词：水稻 土壤铜处理 产量 品质 铜含量 

分 类 号：Q945.78[生物学—植物学]