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Effects of PAA (Polyaspartic Acid) Contained Complex Fertilizer on Rice Growth and CH4 emission from Rice Cultivation

Ok-Jung Ju 1 Jong-Hyeong Lee 1 최병열 1 Tae-Jin Won 1 Gwang-Grae Cho 1 Jae-Soon Seo 1 김영순 1 Park In Tae 1

1경기도농업기술원

Accredited

ABSTRACT

This study was carried out to investigate the effects of the complex fertilizers containing polyaspartic acid (PAA) on growth and CH4 emission in rice field and optimum application rate of the fertilizer compared to the standard recommended application rate (control). The PAA-containing complex fertilizers (PCF) were applied at 55, 65 and 75% levels of standard recommended application rate (control). The application rate of PAA in the plot of every PCF treatment was 150g ai 10a-1. The PCF was applied as a basal dressing without topdressing at tillering stage. The growth parameters of rice and its nitrogen use efficiency treated with PCF at a 65 to 75% level were not different compared with those of control, and the rice yield was also not significantly different between PCF at a 65 to 75% level and control during 2 years(2010~2011) field experiment. And the NH4-N content in soil was not affected by 65% to 75% level of PCF treatment. Considering overall research results such as rice yield and growth parameters PCF is not significantly different with the control and the optimum application rate of the PCF as a basal fertilization was determined to be 65~75% of the standard application rate based on the result in rice cultivation. Moreover, CH4 emission rate was significantly reduced by PCF treatments, showing 216 kg and 229 kg CH4/ha at 65% and 75% PCF treatment level, respectively, compared to 266 kg CH4/ha of the control.

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* References for papers published after 2022 are currently being built.