摘要
采用田间试验方法,研究了木质素施入土壤后对尿素转化及冬小麦生物量、氮素营养的影响。结果表明,木质素能调控无机态氮释放,表现出在冬小麦返青期施用木质素的土壤无机态氮含量较低而拔节期较高的趋势。施用木质素后土壤无机态氮的动态变化情况,有利于促进冬小麦的氮素吸收,促进植株对氮素的吸收利用。木质素提高了冬小麦生物量最大积累速率,其中铵法木质素提高了29%,碱法木质素提高了13%。铵法木质素、碱法木质素处理与化肥相比,氮肥农学利用率、氮肥表观利用率、氮肥偏生产力、氮素吸收强度都有所提高,且铵法木质素比碱法木质素效果明显。
A field trial was carried out to determine the effects of amendments two kinds of lignin, one was from ammonium sulfide pulping process and the other was from Kraft pulping process, on urea transformation and nitrogen availability in soil. Results showed that lignin could regulate nitrogen release. Compared with no-fignin application treatment, lignin application could decrease the content of inorganic nitrogen in the soil during the regreening stage of winter wheat but increase the content of inorganic nitrogen in the soil during jointing stage. The changes of soil inorganic nitrogen content after lignin application could benefit the nitrogen uptake and improve the soil nitrogen supplying for winter wheat during the rapid growing stages. Application of ammonium lignin and alkalize lignin increased the maximum accumulation rate of biomass by 29%,19% respectively. Lignin application could promote N uptake of plant and increase N agronomic efficiency, apparent N recovery efficiency and partial factor productivity of N fertilizer. The effect of ammonium lignin on urea transformation and nitrogen availability was more obvious than alkali lignin.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2010年第11期2147-2152,共6页
Journal of Agro-Environment Science
基金
国家高技术研究发展计划(863)课题(2008AA06Z307)
关键词
木质素
土壤氮
氮素营养
冬小麦
lignin
soil nitrogen
nitrogen nutrition
winter wheat
