CH4 and N2O Emissions and Productivity of Physic nut (Jatropha curcas L) In Three Nitrogen Fertilizer Sources
TINGKAT EMISI CH4 DAN N2O SERTA PRODUKTIVITAS
TANAMAN JARAK PAGAR (Jatropha curcas L.) PADA TIGA
SUMBER PUPUK NITROGEN
MERCY BIENTRI YUNINDANOVA
SEKOLAH PASCASARJANA
INSTITUT PERTANIAN BOGOR
BOGOR
2011
PERNYATAAN MENGENAI TESIS DAN
SUMBER INFORMASI
Dengan ini saya menyatakan bahwa tesis dengan judul Tingkat emisi
CH4 dan N2O serta produktivitas tanaman jarak pagar (Jatropha
curcas L.) pada tiga sumber pupuk nitrogen adalah karya saya dengan
arahan dari komisi pembimbing dan belum diajukan dalam bentuk apapun kepada
perguruan tinggi manapun. Sumber informasi yang berasal atau dikutip dari karya
yang diterbitkan penulis lain telah disebutkan dalam teks dan dicantumkan dalam
Daftar Pustaka pada bagian akhir tesis ini.
Bogor, Agustus 2011
Mercy Bientri Yunindanova
NIM A252090041
ABSTRACT
MERCY BIENTRI YUNINDANOVA. CH4 and N2O Emissions and Productivity of
Physic nut (Jatropha curcas L.) In Three Nitrogen Fertilizer Sources. Under direction
of HERDHATA AGUSTA and M SYAKIR
Methane (CH4) and nitrous oxide (N2O) are important atmospheric trace
gases influencing radiative forcing and atmospheric chemistry. Agriculture is one
of the anthropogenic sources of CH4 and N2O. Physic nut (Jatropha curcas L.) is
a kind of plant than can be used as plant oil sources. Application of nitrogen
fertilizer can increase plant growing including physic nut. The effect of nitrogen
addition through fertilization on greenhouse gases (CH4 and N2O) in physic nut
cultivation area is poorly understood. Therefore, the aim of this study was to
investigate effects of nitrogen fertilization on CH4 and N2O emissions and grow of
physic nut. For this purposes, 13 treatments of nitrogen fertilizer was applied
including surface application of urea 50%, surface application of urea 100%, deep
placement of urea 50%, deep placement of urea 100%, surface application of
jatropha cake 50%, surface application of jatropha cake 100%, deep placement of
jatropha cake 50%, deep placement of jatropha cake 100%, surface application of
slow release urea 50%, surface application of slow release urea 100%, deep
placement of slow release urea 50%, deep placement of slow release urea 100%
and control. Application of 100 % fertilizer was 80 g for urea and slow release
urea, and 2 kg of jatropha cake. This experiment was arranged in Completely
Random Block Design in three repetitions. The result of the experiment showed
that deep placement of jatropha cake 100% gave the best result in plant height and
number of leaf. Surface application of urea 100% gave the best result on physic
nut productivity. Surface application of urea 100% produced 28.56 numbers of
fruits, more than the other treatments, but this treatment was not significant
different to deep placement of jatropha cake 100%. From diurnal change analysis,
we determined the best time to take gas emission, that is between 07.00-09.00
a.m. CH4 emission had significant correlation with NH4+ concentration (p: 0.0487;
r: 0.556). CH4 emission was not have correlation with pH, Eh, soil moisture, and
soil nitrate. Increasing N concentration could affect N2O emission. N2O emission
was not influenced by pH, soil moisture, and Eh. Measurement of soil variable in
different soil depth showed that pH value had significant correlation with Eh
(p
TANAMAN JARAK PAGAR (Jatropha curcas L.) PADA TIGA
SUMBER PUPUK NITROGEN
MERCY BIENTRI YUNINDANOVA
SEKOLAH PASCASARJANA
INSTITUT PERTANIAN BOGOR
BOGOR
2011
PERNYATAAN MENGENAI TESIS DAN
SUMBER INFORMASI
Dengan ini saya menyatakan bahwa tesis dengan judul Tingkat emisi
CH4 dan N2O serta produktivitas tanaman jarak pagar (Jatropha
curcas L.) pada tiga sumber pupuk nitrogen adalah karya saya dengan
arahan dari komisi pembimbing dan belum diajukan dalam bentuk apapun kepada
perguruan tinggi manapun. Sumber informasi yang berasal atau dikutip dari karya
yang diterbitkan penulis lain telah disebutkan dalam teks dan dicantumkan dalam
Daftar Pustaka pada bagian akhir tesis ini.
Bogor, Agustus 2011
Mercy Bientri Yunindanova
NIM A252090041
ABSTRACT
MERCY BIENTRI YUNINDANOVA. CH4 and N2O Emissions and Productivity of
Physic nut (Jatropha curcas L.) In Three Nitrogen Fertilizer Sources. Under direction
of HERDHATA AGUSTA and M SYAKIR
Methane (CH4) and nitrous oxide (N2O) are important atmospheric trace
gases influencing radiative forcing and atmospheric chemistry. Agriculture is one
of the anthropogenic sources of CH4 and N2O. Physic nut (Jatropha curcas L.) is
a kind of plant than can be used as plant oil sources. Application of nitrogen
fertilizer can increase plant growing including physic nut. The effect of nitrogen
addition through fertilization on greenhouse gases (CH4 and N2O) in physic nut
cultivation area is poorly understood. Therefore, the aim of this study was to
investigate effects of nitrogen fertilization on CH4 and N2O emissions and grow of
physic nut. For this purposes, 13 treatments of nitrogen fertilizer was applied
including surface application of urea 50%, surface application of urea 100%, deep
placement of urea 50%, deep placement of urea 100%, surface application of
jatropha cake 50%, surface application of jatropha cake 100%, deep placement of
jatropha cake 50%, deep placement of jatropha cake 100%, surface application of
slow release urea 50%, surface application of slow release urea 100%, deep
placement of slow release urea 50%, deep placement of slow release urea 100%
and control. Application of 100 % fertilizer was 80 g for urea and slow release
urea, and 2 kg of jatropha cake. This experiment was arranged in Completely
Random Block Design in three repetitions. The result of the experiment showed
that deep placement of jatropha cake 100% gave the best result in plant height and
number of leaf. Surface application of urea 100% gave the best result on physic
nut productivity. Surface application of urea 100% produced 28.56 numbers of
fruits, more than the other treatments, but this treatment was not significant
different to deep placement of jatropha cake 100%. From diurnal change analysis,
we determined the best time to take gas emission, that is between 07.00-09.00
a.m. CH4 emission had significant correlation with NH4+ concentration (p: 0.0487;
r: 0.556). CH4 emission was not have correlation with pH, Eh, soil moisture, and
soil nitrate. Increasing N concentration could affect N2O emission. N2O emission
was not influenced by pH, soil moisture, and Eh. Measurement of soil variable in
different soil depth showed that pH value had significant correlation with Eh
(p