水资源与水工程学报2024，Vol.35Issue(1)：217-224,8.DOI:10.11705/j.issn.1672-643X.2024.01.25
生物有机肥与水分联合调控下稻田土壤氮素变化规律
Soil nitrogen changes in rice fields under combined regulation of bio-organic fertilizer and water
摘要
Abstract
In order to explore the characteristics and rules of soil nitrogen change in paddy fields under the combined regulation of bio-organic fertilizers and controlled irrigation,a rice plot planting experiment was carried out.Two irrigation modes:flood irrigation(F),controlled irrigation(C)and three fertiliza-tion modes:full chemical fertilizer(A),replacement of chemical nitrogen by 15%bio-organic fertilizer(B),replacement of chemical nitrogen by 30%bio-organic fertilizer(C)were set up to analyze the vari-ation characteristics of soil ammonium nitrogen content and soil nitrate nitrogen content during rice growth period.Every treatment is fertilized at the same nitrogen level.We found that till the tillering stage of rice,the average contents of ammonium nitrogen in treatments with bio-organic fertilizer under the same irrigation mode were all lower than those with full chemical fertilizer,with a decrease of 19.85%-48.78%;the average contents of nitrate nitrogen in treatments with C were lower than those with A,with a decrease of 15.35%-33.08%.While from the jointing stage,under the same irrigation mode,the av-erage contents of ammonium nitrogen in treatments with bio-organic fertilizer were 12.71%-56.26%higher than those with full chemical fertilizer;the average contents of nitrate nitrogen in treatments with bio-organic fertilizer were also 19.21%-105.80%higher than those with full chemical fertilizer,except FB treatment.The soil nitrate nitrogen content in the whole rice growth period under controlled irrigation was significantly higher than that under flood irrigation(P<0.05),but the soil ammonium nitrogen con-tent was higher under flood irrigation.The results show that bio-organic fertilizer combined with chemical fertilizer is beneficial to the accumulation of soil ammonium nitrogen and nitrate nitrogen after the tillering stage,and improves the accumulation of soil nitrogen in paddy fields,and the replacement of chemical nitrogen by 15%bio-organic fertilizer has a better effect.Moreover,controlled irrigation increases the content of soil nitrate nitrogen and reduces the content of soil ammonium nitrogen.For better environmen-tal and economic benefits,a combination of controlled irrigation and replacement of chemical nitrogen by 15%bio-organic fertilizer is recommended.关键词
生物有机肥/控制灌溉/联合调控/铵态氮/硝态氮/土壤氮素变化/水稻Key words
bio-organic fertilizer/controlled irrigation/combined regulation/ammonium nitrogen/ni-trate nitrogen/soil nitrogen change/rice分类
农业科技引用本文复制引用
姚显紫,侯会静,韩正砥,詹沐霖,钱翔..生物有机肥与水分联合调控下稻田土壤氮素变化规律[J].水资源与水工程学报,2024,35(1):217-224,8.基金项目
江苏省研究生科研创新计划项目(扬州大学)(KYCX22_3497) （扬州大学）
江苏省高校优势学科建设项目(PAPD) （PAPD）
