RINGKASAN
Gigih Himawan. H0206049. “N Total dan Serapan N Tanaman Padi pada Berbagai Imbangan Pupuk Anorganik Pupuk Kandang Sapi dan Seresah Sengon (Paraserianthes falcataria L.)”. Tujuan penelitian ini adalah untuk mengkaji apakah pemberian pupuk anorganik, pupuk kandang sapi dan seresah sengon (Paraserianthes falcataria L.) dapat meningkatkan N total dan serapan N tanaman padi.
Penelitian ini dilaksanakan di Desa Pereng, Mojogedang, Karanganyar pada bulan Juni 2009 sampai Desember 2009. Penelitian ini merupakan penelitian dengan menggunakan rancangan dasar RAKL faktor tunggal yaitu Dosis kebiasaan petani 400 kg/ha urea, 100 kg/ha SP36, 100 kg/ha KCl (D1); Dosis pupuk rekomendasi 250kg/ha urea, 75 kg/ha SP36, 100 kg/ha KCl (D2); Pupuk kandang sapi 10 ton/ha (D3); 45% pupuk kandang sapi + 100% dosis rekomendasi + Seresah sengon 5% bobot pupuk kandang sapi (D4); 45% pupuk kandang sapi + 50% dosis rekomendasi + Seresah sengon 5% bobot pupuk kandang sapi (D5); 42,5% pupuk kandang sapi + 100% dosis rekomendasi + Seresah sengon 7,5% bobot pupuk kandang sapi (D6); 42,5% pupuk kandang sapi + 50% dosis rekomendasi + Seresah sengon 7,5% bobot pupuk kandang sapi (D7); 40% pupuk kandang sapi + 100% dosis rekomendasi + Seresah sengon 10% bobot pupuk kandang sapi (D8); 40% pupuk kandang sapi + 50% dosis rekomendasi + Seresah sengon 10% bobot pupuk kandang sapi (D9). Analisis data menggunakan uji F dengan taraf 1 dan 5% (bila data normal) dan Kruskal Wallis (bila data tidak normal), untuk membandingkan rerata antar perlakuan menggunakan uji DMR taraf 5% (bila data normal) dan Mood Median (bila data tidak normal) dan untuk mengetahui keeratan hubungan antar variabel menggunakan uji korelasi.
Hasil penelitian menunjukkan bahwa pemberian pupuk anorganik, pupuk kandang sapi dan seresah sengon berpengaruh nyata terhadap N total tanah dan berpengaruh sangat nyata terhadap serapan N tanaman padi. N total tertinggi sebesar 0,07 % dicapai pada perlakuan 45% pupuk kandang sapi + 100% dosis rekomendasi + seresah sengon 5% bobot pupuk kandang sapi (D4), sedangkan serapan N tanaman padi tertinggi dicapai pada perlakuan 42,5% pupuk kandang sapi + 100% dosis rekomendasi + Seresah sengon 7,5% bobot pupuk kandang sapi (D6) sebesar 0,549 g/tanaman.
Kata kunci : pupuk, sengon, N total, serapan N
SUMMARY
Gigih Himawan. H0206049. “Total N and Its Uptake by Rice Plant (Oryza sativa L.) at Various Balance of Inorganic Fertilizer Cow Manure and Sengon Litter (Paraserianthes falcataria L.)”. The aim of this research was to study the application of inorganic fertilizer, cow manure and sengon litter (Paraserianthes falcataria L.) can increase total N and its uptake by rice plant (Oryza sativa L.).
This research was the field experiment, carried out on March to November 2009 at Dani, Pereng, Mojogedang Subdistrict, Karanganyar Regency. The research use Randomized Completely Block Design (RCBD) from single factor consist of 9 treatments, they were farmer habbitualy dose 400 kg urea, 100 SP36, 100 kg of KCl (D1); the recommended dose 250 kg of urea fertilizer, 75 kg SP36, 100 kg of KCl at ((D2); cow manure (10 ton/ ha) (D3); 45% cow manure + 5% sengon litter + 100% recommended dose (D4); 45% cow manure + 5% sengon litter + 50% recommended dose (D5); 42.5% cow manure + 7.5% sengon litter + 100% recommended dose (D6); 42.5% cow manure + 7.5% sengon litter + 50% recommended dose (D7); 40% cow manure + 10% sengon litter + 100% recommended dose (D8); 40% cow manure + 10% sengon litter + 50% recommended dose (D9). The data analysis used the F test level 1% and 5% (for normal data) and Kruskal-Wallis (for abnormal data), DMRT on 5 % (for normal data) and Mood Median (for abnormal data), then Correlation test.
The result showed that the application of inorganic fertilizer, cow manure and sengon litter was significant to Total N and highly significant to N uptake. The highest total N was reached at (45% cow manure + 5% sengon litter + 100% recommended dose) as 0,07 %, whereas the highest N uptake was reached at (42.5% cow manure + 7.5% sengon litter + 100% recommended dose) as 0,549 g/plant.
