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Effect of hydroquinone, dicyandiamide and encapsulated calcium carbide on urea N uptake by spring wheat, soil mineral N content and N 2 O emission
Author(s) -
Chen L.,
Boeckx P.,
Zhou L.,
Cleemput O.,
Li R.
Publication year - 1998
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/j.1475-2743.1998.tb00156.x
Subject(s) - urea , calcium carbide , hydroquinone , chemistry , leaching (pedology) , fertilizer , agronomy , nitrogen , urease , nitrate , zoology , nuclear chemistry , soil water , biochemistry , biology , organic chemistry , ecology
. At present about half of the N fertilizer used in China is as urea. However, recovery of urea N in crops is often limited to 30–40%. Application of urea in combination with hydroquinone plus dicyandiamide (U‐HQ‐DCD) gave an improved urea‐N recovery and grain yield by spring wheat in a pot experiment. The apparent total urea‐N recovery was 69% and 73% of this recovered N was found in the grain. The grain yield was 32% higher than in the treatment where urea was applied without inhibitors. The application of hydroquinone and dicyandiamide also resulted in a smaller soil nitrate content, which might restrict post‐harvest leaching of N. Another beneficial effect of these inhibitors was that the N 2 O emission from the soil—plant system was reduced by 35% compared to the treatment where only urea was applied. The use of urea in combination with hydroquinone plus encapsulated calcium carbide gave smaller beneficial effects.