生态学杂志2018，Vol.37Issue(9)：2672-2679,8.DOI:10.13292/j.1000-4890.201809.017
沼液替代化肥氮对水稻生长发育及稻米品质的影响
Effect of chemical fertilizer nitrogen substitution by biogas slurry on the growth and quality of rice
摘要
Abstract
A field experiment was conducted to examine the effects of different rates of chemical fertilizer nitrogen substitution by biogas slurry on rice growth ( development progress,plant height dynamic,population dynamic,and dry matter accumulation dynamic),yield,quality,and heavy metal content. The results showed that when the amount of nitrogen input was same,rice growth indices and yield first increased and then decreased with increasing rates of chemical fertilizer nitrogen substitution by biogas slurry,with rice growth indices and yield under the treatment with 70％ chemical fertilizer nitrogen substitution by biogas slurry ( 70％Nbs) being the highest. Biogas slurry could improve rice quality. With the increases of the proportion of biogas slurry application, the contents of Cu,Zn,Pb and As in grains increased slightly,while the contents of Cd and Cr in grains decreased slightly. The contents of heavy metals in grains of all treatments were lower than the critical levels of contaminants in foods ( GB 2762 - 2005) . Compared with the treatment of chemical fertilizer application alone ( Ncf),the rice growth indices in the treatment with 100％ chemical fertilizer nitrogen substitution by biogas slurry ( 100％Nbs) decreased,with a risk of yield reduction. The treatment with 200％ chemical fertilizer nitrogen substitution by biogas slurry ( 200％Nbs) could lead to rice lodging and yield reduction and increase the risk of secondary pollution,due to the prolonged growth duration and the increased basal internode length. Therefore,the optimal proportion of chemical fertilizer nitrogen substitution by biogas slurry was 70％,with the biogas slurry application level of 278.56×103 kg·hm-2 .关键词
沼液/水稻/生长发育/品质/重金属Key words
biogas slurry/rice/growth/quality/heavy metal引用本文复制引用
王桂良,吴雷明,寇祥明,张家宏,王守红,徐荣,韩光明,唐鹤军,朱凌宇,毕建花..沼液替代化肥氮对水稻生长发育及稻米品质的影响[J].生态学杂志,2018,37(9):2672-2679,8.基金项目
江苏省农业科技自主创新资金( CX( 16) 1003) 、江苏省农业三新工程项目( SXGC[2017]161、SXGC[2017]168) 、江苏省重点研发计划( 社会发展) ( BE2017688) 、江苏省农业标准化试点项目( 苏质监标发[2017]46 号) 、江苏省特色示范基地建设项目( KF( 17) 1022) 、扬州市重点研发计划( 社会发展) ( YZ2016071) 和扬州市粮食绿色增产"1120"工程项目资助. （ CX( 16）
