scholarly journals STRATEGI PEMUPUKAN TANAMAN KARET DALAM MENGHADAPI HARGA KARET YANG RENDAH

2018 ◽  
Vol 37 (2) ◽  
pp. 75-86
Author(s):  
Jamin Saputra
Keyword(s):  
Slow Release ◽  
Release Agent ◽  
Slow Release Fertilizer

Pemeliharaan tanaman karet melalui pemupukan merupakan salah satu langkah penting yang harus dilakukan untuk mencapai pertumbuhan dan produksi yang optimal. Akhir-akhir ini ketersediaan pupuk yang terbatas, harga yang terus meningkat, dan harga karet yang rendah menyebabkan kegiatan pemupukan pada perkebunan karet sering tertunda. Selain penundaan kegiatan pemupukan juga terjadi pengurangan dosis dan bahkan meniadakan kegiatan pemupukan. Tulisan ini bertujuan untuk mengkaji hasil-hasil penelitian dalam upaya peningkatan efisiensi pemupukan pada tanaman karet sehingga biaya pemupukan dapat dikurangi. Hasil-hasil penelitian sebelumnya menunjukkan bahwa pemupukan dapat dikurangi sampai 75% dari dosis pupuk tunggal apabila menerapkan teknologi pemupukan menggunakan pupuk majemuk dengan tambahan slow release agent yang sering disebut dengan Slow Release Fertilizer (SRF) dan upaya lain dengan menggunakan kombinasi pupuk tunggal dengan pupuk hayati. Selain itu penentuan dosis rekomendasi harus mempertimbangkan sifat tanah sehubungan dengan kapasitas tanah dalam menyediakan unsur hara untuk tanaman, faktor lingkungan yang mempengaruhi efisiensi pemupukan, serta kebutuhan tanaman akan unsur hara sesuai dengan umur, produksi, dan kesehatan tanaman. Pada kondisi pekebun yang mengalami kesulitan melakukan pemupukan akibat harga karet yang rendah maka penundaan pemupukan selama dua tahun belum memberikan efek kerugian finansial bagi pekebun.

Evaluation of Nano Structured Slow Release Fertilizer on the Soil Fertility, Yield and Nutritional Profile of Vigna radiata

2017 ◽  
Vol 11 (1) ◽  
pp. 50-62 ◽  
Author(s):  
Rajendran Mala ◽  
Ruby Selvaraj ◽  
Vidhya Sundaram ◽  
Raja Rajan ◽  
Uma Gurusamy
Keyword(s):  
Soil Fertility ◽  
Vigna Radiata ◽  
Slow Release ◽  
Nutritional Profile ◽  
Slow Release Fertilizer

Ammoxidized kraft lignin as a slow-release fertilizer tested on Sorghum vulgare

1997 ◽  
Vol 61 (1) ◽  
pp. 43-46 ◽  
Author(s):  
F. Ramírez ◽  
V. González ◽  
M. Crespo ◽  
D. Meier ◽  
O. Faix ◽  
...  
Keyword(s):  
Slow Release ◽  
Kraft Lignin ◽  
Sorghum Vulgare ◽  
Slow Release Fertilizer

scholarly journals Using water hyacinth (Eichhornia crassipes) biomass and humic substances to produce urea-based multi-coated slow release fertilizer

Cellulose ◽  
2021 ◽  
Author(s):  
Iris Amanda A. Silva ◽  
Osmir Fabiano L. de Macedo ◽  
Graziele C. Cunha ◽  
Rhayza Victoria Matos Oliveira ◽  
Luciane P. C. Romão
Keyword(s):  
Organic Matter ◽  
Humic Substances ◽  
Natural Organic Matter ◽  
Nitrogen Fertilization ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Slow Release ◽  
Leaching Tests ◽  
Slow Release Fertilizer ◽  
Atmosphere System

AbstractUrea-based multi-coated slow release fertilizer was produced using water hyacinth, humic substances, and chitosan, with water rich in natural organic matter as a solvent. Elemental analysis showed that the nitrogen content of the fertilizer (FERT) was around 20%. Swelling tests demonstrated the effectiveness of the water hyacinth crosslinker, which reduced the water permeability of the material. Leaching tests showed that FERT released a very low concentration of ammonium (0.82 mg L−1), compared to the amount released from urea (43.1 mg L−1). No nitrate leaching was observed for FERT, while urea leached 13.1 mg L−1 of nitrate. In water and soil, FERT showed maximum releases after 30 and 40 days, respectively, while urea reached maxima in just 2 and 5 days, respectively. The results demonstrated the promising ability of FERT to reduce nitrogen losses, as well as to minimize environmental impacts in the soil–plant-atmosphere system and to improve the efficiency of nitrogen fertilization. Graphic abstract

scholarly journals Potassium ferrite nanoparticles on DAP to formulate slow release fertilizer with auxiliary nutrients

2021 ◽  
Vol 215 ◽  
pp. 112148
Author(s):  
Ifra Saleem ◽  
Muhammad Aamer Maqsood ◽  
Muhammad Zia ur Rehman ◽  
Tariq Aziz ◽  
Ijaz Ahmad Bhatti ◽  
...  
Keyword(s):  
Slow Release ◽  
Ferrite Nanoparticles ◽  
Slow Release Fertilizer

Evaluation of Composted Sewage Sludge/Straw Mixture for Horticultural Utilization

1989 ◽  
Vol 21 (8-9) ◽  
pp. 889-897 ◽  
Author(s):  
J. M. Lopez-Real ◽  
E. Witter ◽  
F. N. Midmer ◽  
B. A. O. Hewett
Keyword(s):  
Collaborative Research ◽  
Slow Release ◽  
General Purpose ◽  
Exchange Capacity ◽  
Soluble Salts ◽  
Slow Release Fertilizer ◽  
Wide Range ◽  
Sludge Cake ◽  
Bulk Volume ◽  
Composted Sewage Sludge

Collaborative research between Southern Water and Wye College, University of London, has led to the development of a static aerated pile composting process for the treatment of dewatered activated sludge cake/straw mixtures. The process reduces bulk volume of the sludge producing an environmentally acceptable, stabilised, odour and pathogen-free product. Characteristics of the compost make it a suitable general purpose medium for container grown plants, providing the salt concentration is reduced by washing the compost prior to planting. Compared with peat the compost has a higher bulk density, a lower waterholding capacity, a lower cation exchange capacity, a high content of soluble salts, and a higher content of plant nutrients. A compost mixture was successfully developed in the growing trials containing equal quantities of compost, Sphagnum peat, and horticultural vermiculite. The compost has been used successfully to grow a wide range of plants. Plants grown in mixtures based on the compost were in general similar to those grown in peat-based growing media. The compost is a valuable soil conditioner and slow release fertilizer.

Sign in / Sign up

Export Citation Format

Share Document