Effect of rice cultivars and fertilizer management on methane emission in a rice paddy in Beijing

Autor: Kesheng, Shao, Zhen, Li
Zdroj: Nutrient Cycling in Agroecosystems; July 1997, Vol. 49 Issue: 1-3 p139-146, 8p
Abstrakt: Experiments were conducted during April-Oct. 1994 in a Beijing rice field. Four types of rice varieties have been tested. Large cultivar differences in methane emission flux have been found. Variety 93812 emitted about fivefold more CH4than did the Qiuguang variety. An organic amendment plus (NH4)2SO4as the base fertilizer and (NH4)2SO4as the topdressing applied in different amounts and growth stages, compared with no topdressing, reduced methane emission about 58% and increased rice yield about 31.7%. Emission peaks of CH4in the tillering stage and reproductive stage were suppressed.
Databáze: Supplemental Index
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