%A 1714071070 Agata Desinta Yoanma
%T PENGARUH APLIKASI BIOCHAR TEMPURUNG KELAPA TERHADAP 
EFEKTIVITAS PENGGUNAAN PUPUK NPK PADA PRODUKSI 
TANAMAN BAWANG MERAH (Allium ascalonicum L.)
%X Shallot plant needs sufficient nutrients in their growth, but one of dominating soil 
in Indonesia is ultisol which is having low nutrient content. Therefore, it needs an 
improvement soil's material such as biochar and NPK fertilizer. The   aim of this 
research  knows  the  effect  of  using  coconut  shell-biochar  due  to  effectiveness  of 
using  NPK  fertilizer  on  shallot  plants  production.  This  research  was  using 
complete randomised factorial design. There are two factors; biochar dose (0, 40, 
80,  and  120  gram/pot)  and  NPK  fertilizer  dose  (0,  0,8,  1,6,  and  2,4  gram/pot). 
Each  treatment  were  repeated  3  times.  The  observed  parameters  are 
characteristic  of  soil  (pH,  bulk  density,  decreasing  soil's  volume)  and  plant 
parameters (plant height, number of  leaves, leaf color, wide canopy, fresh  gross 
weight,  dry  gross  weight,  top  dry  weight,  number  of  tubers,  dry  tuber  weight, 
tuber  diameter,  evapotranspiration,  water  productivity,  and  fertilizer 
productivity).  
The  observation  shows  that  biochar  factor  was  significantly  (?  5%)  affected  to 
bulk density, decreasing soil volume, soil?s pH, fresh gross  weight,  dry top gross 
weight, and fertilizer productivity. Fertilizer factor had a significant effect (? 5%)
on fresh gross weight, dry gross weight, top dry gross  weight, dry tuber weight, 
water  productivity,  and  fertilizer  productivity.  Then,  the  interaction  of  the  two 
factors  significantly  (?  5%)  on  plant  height,  number  of  leaves,  tuber  diameter, 
and  evapotranspiration.   The  best  treatment  is B1N1  (40  gram/pot  biochar  and 
0,8 gram/pot NPK fertilizer) because could produce the best fresh gross weight. 
Adding  40  gram/pot  of  biochar  could  decrease  dose  of  fertilizer's 
recommendation from 2,4 gram/pot to 0,8 gram/pot.
Keyword:  decreasing  soil's  volume,  fertilizer  productivity,  water  productivity, 
dose, pH




Tanaman  bawang  merah  membutuhkan  unsur  hara  yang  cukup  dalam 
pertumbuhannya, namun salah satu tanah yang mendominasi di Indonesia adalah 
ultisol  yang  memiliki  kandungan  unsur  hara  yang  rendah.   Oleh  karena  itu, 
dibutuhkan  bahan  pembenah  tanah  seperti  biochar  dan  pupuk.  Penelitian  ini 
bertujuan  untuk  mengetahui  pengaruh  penggunaan  biochar  tempurung  kelapa 
terhadap  efektivitas  penggunaan  pupuk  NPK  pada  produksi  bawang  merah. 
Penelitian disusun dalam Rancangan Acak Lengkap Faktorial (RALF) yang terdiri 
dari 2 faktor yaitu dosis  biochar  (0, 40, 80, dan 120 gram/pot) dan dosis pupuk 
NPK  (0,  0,8,  1,6,  dan  2,4  gram/pot).   Setiap  kombinasi  perlakuan  diulang 
sebanyak 3 kali.    Parameter yang diamati meliputi karakteristik tanah (pH,  bulk 
density,  dan  penyusutan  volume tanah) dan parameter tanaman (tinggi tanaman, 
jumlah daun,  warna daun, luas kanopi,  bobot brangkasan  segar, bobot  brangkasan 
kering,  bobot  brangkasan  atas  kering,  jumlah  umbi,  bobot  umbi  kering  angin, 
diameter umbi, evapotranspirasi, produktivitas air, dan produktivitas pupuk). 
Hasil  penelitian  menunjukkan  bahwa  faktor  biochar  berpengaruh  nyata  (?  5%) 
terhadap  bulk  density,  penyusutan  volume  tanah,  pH  tanah,  bobot  brangkasan
segar,  bobot  brangkasan  atas  kering,  dan  produktivitas  pupuk.  Faktor  pupuk 
berpengaruh  nyata  (?  5%)  terhadap  bobot  brangkasan  segar,  bobot  brangkasan
kering,  bobot  brangkasan  atas  kering,  bobot  umbi  kering,  produktivitas  air,  dan 
produktivitas pupuk. Kemudian, interaksi kedua faktor berpengaruh nyata (? 5%) 
terhadap  tinggi  tanaman,  jumlah  daun,  diameter  umbi,  dan  evapotranspirasi. 
Kombinasi perlakuan terbaik adalah B1N1 (Biochar  40 gram/pot dan pupuk NPK 
0,6  gram/pot  karena  dapat  menghasilkan  bobot  brangkasan  segar  terbaik. 
Penambahan  biochar  dengan  dosis  40  gram/pot  dapat  mengurangi  dosis  pupuk 
rekomendasi yaitu 1,2 gram/pot menjadi 0,8 gram/pot.
Kata Kunci : penyusutan volume tanah, produktivitas pupuk, produktivitas air, 
dosis, pH 
%C UNIVERSITAS LAMPUNG
%D 2021
%I FAKULTAS PERTANIAN
%L eprints61536