Lilik Tri Indriyati, Lilik Tri
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Uji Aktivitas Lakase dan Selulase pada Lignoselulosa Gambut dengan Berbagai Kadar Air Mulyawan, Ronny; Indriyati, Lilik Tri; Widiastuti, Happy; Sabiham, Supiandi
Jurnal Ilmu Pertanian Indonesia Vol 24, No 1 (2019): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.74 KB) | DOI: 10.18343/jipi.24.1.20

Abstract

The degradation of lignocellulose as the main constituents of peat is catalyzed by enzymes such as laccase or cellulase. The purpose of this research was to study the pattern of laccase and cellulase activities on sterile and non-sterile peat materials at three different water contents (125-175, 225-275, and 325-375%). The peat soil used was collected from oil palm rhizosphere in Riau Province. This research used the descriptive method by comparing the mean values between treatments. The results showed that enzymes activities on sterile and non-sterile peat added with laccase or cellulase were higher compared to those without enzyme addition. The highest laccase activity was at the first day of incubation, while that for selulase was at the 10th days of incubation. The activity of enzyme then decreased with the increase in the respected incubation time. The difference in decreasing of lignin and cellulose content at 125-175% water content was higher than at the other water contents. The decreases in lignin and cellulose contents were higher by addition of respected enzymes both in sterile and non-sterile peat. It could be concluded that at higher water content, laccase and cellulase activities were depressed both on sterile and non sterile peat, especially after the addition of enzyme.
Pembinaan Produksi Kompos Limbah Pertanian dan Pemanfaatannya di Kecamatan Tamansari, Kabupaten Bogor Iswati, Asdar; Indriyati, Lilik Tri
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Vol 1, No 1 (2015): Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institut Pertanian Bogor

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Abstract

Most of agricultural lands in Pasir Eurih Village are paddy field simple irrigation system, while most of them in Sukajadi Village are upland. Farmers in both villages are used to composting organic residues, but the composts was not used maximally. The aim of the IbM activities was: (1) To guide our partners to produce better quality of composts sustainable; and(2) To motivate the community of peasant  using composts for their farm. The best compost resulted by IbM-3 guidance was made from rice straw, leaf litter, and chicken manure mixed with rice husk as their bedding by ratio of 3:2:1:1. This compost contained macronutrients (N, 0.56%, P2O5  1.09%, K2O 1.44%, Ca 5.72%, Mg 0.43%, and Na 0.08% respectively), micronutrients Fe 5.309 ppm, Mn 342 ppm, Cu 42 ppm, Zn 69 ppm, and B 33 ppm respectively), and heavy metals of Pb was 4.8 ppm and Cd 0.04 ppm. The addition of 3-4 ton/ha of this compost into paddy soil could reduce chemical fertilizers up to 50%. The addition of 3 ton/ha of this compost to upland soil planted by sweet corn produce same with application of chicken manure bedding or goat manure. Socialization of the benefit of using compost in increasing the soil fertility and crop yield have raised the peasant’s knowledge. It was showed by the mean value of this post test raised 19.67 points for fertilizer and soil fertility matter and 16.63 points for organic materials or natural fertilizers matter. 
JERAPAN NITROGEN-URINE OLEH ZEOLIT DAN PENGARUHNYA TERHADAP PERTUMBUHAN TANAMAN JAGUNG (Zea mays L.) Indriyati, Lilik Tri; Anas, Iswandi
Jurnal Ilmu Tanah dan Lingkungan Vol 15, No 2 (2013)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitl.15.2.84-90

Abstract

Urine umumnya mengandung unsur hara, terutama nitrogen (N) yang tinggi, mudah larut dan tersedia bagi tanaman, tetapi mudah hilang dalam bentuk gas amonia. Nitrogen merupakan unsur hara yang sangat dibutuhkan oleh tanaman. Zeolit merupakan mineral yang memiliki mempunyai afinitas yang tinggi terhadap ion amonium. Zeolit yang mengandung amonium dapat digunakan sebagai pupuk lambat tersedia. Tujuan percobaan ini adalah untuk melihat hubungan antara ukuran zeolit dengan kemampuannya menjerap nitrogen yang terkandung dalam urine sapi, dan mengamati pengaruh ukuran dan takaran zeolit yang telah dicampur dengan urine sapi terhadap pertumbuhan tanaman jagung. Penelitian ini dilakukan dengan percobaan pot di rumah kaca yang disusun secara acak lengkap dengan tiga ulangan. Perlakuan yang diberikan adalah empat taraf takaran zeolit: 1000, 2000, 4000, dan 8000 ppm dengan dua taraf ukuran zeolit, yaitu kurang dari 60 mesh dan 32-60 mesh. Parameter tanaman dan tanah yang diukur adalah tinggi tanaman, bobot kering bagian atas dan akar tanaman, serapan N bagian atas dan akar tanaman, serta KTK tanah. Hasil percobaan menunjukkan bahwa jerapan N-urine semakin besar dengan semakin halus ukuran zeolit. Tetapi pengaruh pemberian zeolit-urine dengan ukuran 60 mesh terhadap tinggi tanaman, bobot kering bagian atas dan akar tanaman jagung umur 21 hari, serapan N akar serta KTK tanah nyata lebih tinggi daripada pemberian zeolit-urine dengan ukuran yang lebih halus (< 32 mesh). Zeolit-urine dengan takaran 2000 ppm nyata meningkatkan tinggi tanaman, bobot kering bagian atas tanaman, serapan N akar, dan KTK tanah, tetapi interaksi antara ukuran dan takaran zeolit-urine tidak berpengaruh nyata terhadap parameter yang diamati. Pada takaran zeolit-urine lebih dari 2000 ppm, semua parameter pertumbuhan tanaman cenderung menurun.
Efektivitas Pupuk Organik dan Anorganik pada Pertumbuhan dan Hasil Brokoli (Brassica oleracea var. italica) Indriyati, Lilik Tri
Jurnal Ilmu Pertanian Indonesia Vol 23, No 3 (2018): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.36 KB) | DOI: 10.18343/jipi.23.3.196

Abstract

Broccoli (Brassica oleracea var. italica) is one of exotic vegetables having a high value, highly nutritious, rich source of vitamins, and also it contains the glucoraphanin compound which have anticancerous properties. Integrated nutrient management between organic and inorganic fertilizers is an important demand of the present era to increase broccoli yield and to cultivate a land in such a way that the soil productivity should remain sustainable. This research was conducted to study the effectiveness of organic and inorganic fertilizers on the growth and yield of broccoli. There were eight treatments which consisted of organic and inorganic fertilizers with different applications, single or in combination, and control (without fertilizer). Plant of broccoli as an indicator plant was measured for its height and number of leaves for variables of plant growth parameter, and head weight and head diameter for variables of yield. Application of organic and/or inorganic fertilizers significantly increased the growth of broccoli plant compared with control, but they did not show a significant difference with standard NPK treatment. Combination of organic fertilizer at a rate of 4 tons ha-1 and 50% the standard NPK fertilizer showed the highest diameter and yield of broccoli head. The sole application of organic fertilizer at a rate of 4 tons/ha showed the similargrowth and yield of broccoli with standard NPK treatment.
RASIO DAN KEJENUHAN HARA K, Ca, Mg DI DALAM TANAH UNTUK TANAMAN KELAPA SAWIT (Elaeis guineensis Jacq) Ginting, Eko Noviandi; Sutandi, Atang; Nugroho, Budi; Indriyati, Lilik Tri
Jurnal Ilmu Tanah dan Lingkungan Vol 15, No 2 (2013)
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitl.15.2.60-65

Abstract

Pemupukan merupakan salah satu komponen kegiatan pemeliharaan yang menghabiskan biaya yang cukup tinggi sekaligus memiliki pengaruh yang cukup besar terhadap pencapaian produksi tanaman kelapa sawit. Penambahan salah satu unsur hara melalui pemupukan akan menyebabkan terjadinya pergeseran keseimbangan hara di dalam tanah, oleh sebab itu kegiatan pemupukan perlu memperhatikan keseimbangan hara agar pemupukan yang dilakukan dapat lebih efisien dan efektif. Penelitian ini bertujuan untuk mencari nilai kisaran keseimbangan K, Ca, Mg di dalam tanah untuk tanaman kelapa sawit. Penelitian dilakukan dengan metode survei lapangan dengan menggunakan data hasil analisis tanah dan data produksi yang dikumpulkan dari perkebunan kelapa sawit yang tersebar di beberapa provinsi di Indonesia. Hasil penelitian menunjukkan bahwa dengan asumsi nilai sekat produktivitas 25.96 ton TBS ha-1tahun-1 kisaran nilai rasio hara yang seimbang untuk tanaman kelapa sawit masing-masing 5.6 – 10.1 untuk rasio Ca/K, 2.1 – 2.5 untuk rasio Ca/Mg dan 2.1 – 4.5 untuk rasio Mg/K. Sementara nilai kecukupan kejenuhan K, Ca, Mg masing-masing sebesar 2.5%; 11.8% dan 3.7%.
Fraksionasi Fosfor pada Profil Tanah Hutan, Wanatani, dan Tegalan di Jawa Barat Parjono, Parjono; Anwar, Syaiful; Murtilaksono, Kukuh; Indriyati, Lilik Tri
Jurnal Ilmu Pertanian Indonesia Vol 24, No 4 (2019): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18343/jipi.24.4.319

Abstract

This study aims to evaluate the distribution of phosphorus (P) fractions within the soil horizons or profile of forest, agroforestry, and dryland in West Java and their correlations with soil chemical properties. Evaluation was based on the analytical results of soil samples taken from four soil horizons (Ao or Ap, A1 or A2, B1, and, B2) in each land use types. Fractionation of soil P was carried out using a sequential extraction method to get readily available-P (NaHCO3-P-inorganic (i)-P-organic (o)), rather available-P (NaOH-Pi-Po), slowly available-P (HCl-Pi), not available-P (residual-P), and total-P (HCl25%-P) fractions. The results showed that the average concentration of soil residual-P fraction in all land use types reached >99% of the total-P. The highest average concentration of residual-P fraction was measured in dryland, followed by forest and agroforestry. This indicated that soil P adsorption capacity was very high and resulted in a very low concentrations of the soil available-P fractions. The high concentrations of soil residual-P and total-P fractions were most probably related to P fertilizer application, particularly in dryland soil. Distributions of P fractions within the soil horizons at all land use types were significantly correlated with the concentration of soil organic matter content. It is therefore the concentration of soil NaOH-Po fraction was decreasing with the soil depths. The highest concentration was found at Ao or Ap horizon, although it was not the case for NaOH-Po fractions that was relatively constant.