摘要
为了解膜下滴灌土壤硝化、反硝化作用的变化规律,应用气压过程分离(Barometric process separation,BaPS)方法,研究了施氮肥、有机肥与氮肥配施和不施肥3种不同施肥处理的土壤硝化、反硝化速率在覆膜与裸地条件下的动态变化。结果显示,不同处理下土壤硝化、反硝化作用随着玉米生育期的推移有明显的变化。相同栽培措施不同施肥处理间土壤硝化、反硝化速率差异均达极显著水平,且大小顺序为氮+有机肥配施处理>施氮肥处理>不施肥处理(对照);相同施肥处理不同栽培措施间土壤硝化、反硝化速率大小顺序均为覆膜处理>裸地处理。
To study soil nitrification and denitrification under plastic film drip irrigation, the barometric process sepa-ration （ BaPS） method was introduced to measure dynamic change of gross nitrification and denitrification rates in three differ-ent fertilization treatments, nitrogen（ N） application, organic fertilizer combining nitrogen（ N＋OF） application and no fertili-zation（ CK） with or without muching. The results showed that soil nitrification-denitrification changed greatly over maize growth periods. Nitrification rate and denitrification rate differed in three fertilization treatments with or without mulching. The soil with treatment of N＋OF exhibited the fastest nitrification and denitrification rates, followed by N treatment. The ni-trification and denitrification rates were higher in plastic film-mulched soil than those in non-mulched soil in the same fertili-zation treatment.
出处
《江苏农业学报》
CSCD
北大核心
2015年第3期574-578,共5页
Jiangsu Journal of Agricultural Sciences
基金
国家自然科学基金项目(41161037
31371582)
新疆维吾尔自治区高校科研重点项目(XJEDU2007142)
关键词
BaPS系统
硝化速率
反硝化速率
覆膜
barometric process separation （ BaPS ） system
nitrification rate
denitrification rate
plastic film mulching
