摘要
采用室内培养实验,研究了17科30种芳香植物水浸提液对3种土壤中尿素水解和硝化作用的抑制效果。结果表明：浸提液能够对尿素水解起抑制作用的芳香植物有22种,其中5种的抑制效果优于脲酶抑制剂氢醌（HQ）;30种芳香植物浸提液均能够抑制硝化作用,其中11种的硝化抑制效果优于双氰胺（DCD）;菊科植物洋甘菊（Chamomila recutita）和芸香科植物桔子花（Citrus reticulata）既能有效抑制尿素水解,又能有效减缓NH4＋的硝化,是尿基氮肥增效剂的最佳选择。研究还表明,洋甘菊和桔子花粉末在培养后的24~36h脲酶抑制率最高,在培养后的7~14 d硝化抑制率最高,且抑制效果随粉末用量的增加而增强。
An incubation experiment was carried out to investigate the effects of aqueous extracts of 30 aromatic plant species from 17 families on urea hydrolysis and nitrification in 3 soils. The results indicated that the aqueous extracts from 22 of the aromatic plants could inhibit urea hydrolysis,and 5 of the extracts showed better effects than urease inhibitor hydroquinone（ HQ）.The aqueous extracts from 30 of the aromatic plants could inhibit nitrification of NH4＋,and 11 of the extracts showed better effects than nitrification inhibitor dicyandiamide（ DCD）. Chamomila recutita belonging to Asteraceae and Citrus reticulate belonging to Rutaceae could effectively inhibit both urea hydrolysis and nitrification,and hence may be applied as synergist of urea. The results also indicated that the best inhibitory effects of C. recutita and C. reticulate on urea hydrolysis and nitrification appeared during 24-36 h and during 7-14 d of incubation,respectively,and their inhibitory effects increased with increasing their dosages.
出处
《生态学杂志》
CAS
CSCD
北大核心
2014年第12期3440-3446,共7页
Chinese Journal of Ecology
基金
海南省自然科学基金项目(312100)
三亚市省基金配套项目(2013PT22)
国家科技支撑计划项目(2011BAD11B04)资助
关键词
芳香植物
尿素水解
硝化作用
抑制作用
aromatic plant
urea hydrolysis
nitrification
inhibitory effect.
