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All Journal Agroista: Jurnal Agroteknologi
Herry Wirianata
Program Studi Agroteknologi Fakultas Pertanian INSTIPER Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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KONTRIBUSI TANDAN KOSONG DALAM MENINGKATKAN PENGARUH PUPUK ANORGANIK TERHADAP PRODUKSI KELAPA SAWIT Suprih Wijayani; Herry Wirianata
AGROISTA : Jurnal Agroteknologi Vol. 6 No. 1 (2022): MEI
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (742.883 KB) | DOI: 10.55180/agi.v6i1.242

Abstract

Sustainable intensification of oil palm plantations faces the challenge of decreasing soil fertility and increasing the price of inorganic fertilizers. Organic matter plays an important role in maintaining soil fertility. Empty fruit bunches (EFB) are the main co-product of palm oil mills that have the potential to be used as a source of organic matter and nutrient sources. This study aims to reveal the effect of the application of empty fruit bunches in increasing the effectiveness and substituting inorganic fertilizers for the components of oil palm production. The number of female inflorescence, the number of FFB and the average weight of FFB were observed for 3 years on palm aged 8, 9 and 10 years. Application of EFB + 70% recommended inorganic fertilizer. The recommended fertilizer is 8 kg per tree (N P K Mg 14-28-6-2 +0.5 B). EFB are applied as one layer of mulch with a size of 3x4 m on a dead net. The results showed that the application of empty bunches could increase the number of female flowers and the number of FFB in plants aged 9 and 10 years (1-2 years after application), while inorganic fertilizer EFB was only at the age of 8 years (0 years after application) for both production components. FFB weight one year after application of EFB+70% inorganic fertilizer (age 9 years ) was higher than 8 and 10 year aged plants. The application of EFB+70% inorganic fertilizer can increase the contribution of nutrients from fertilizers compared to the application of inorganic fertilizers solely.
Pengaruh Decanter Solid dan Pupuk NPK terhadap Peningkatan Pertumbuhan Bibit Kelapa Sawit di Main Nursery Imam Prasetyo; Sri Manu Rohmiyati; Herry Wirianata
AGROISTA : Jurnal Agroteknologi Vol. 7 No. 1 (2023): MEI
Publisher : Program Studi Agroteknologi INSTIPER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/agi.v7i1.442

Abstract

Solid decanter is one of the by-products from palm oil mills, which  have not used as much as empty fruit bunches. The purpose of this study was to determine the effect of solid decanter as a mixture of nursery media and NPK doses on the increament growth of oil palm seedlings in the main nursery (MN). This study used a factorial experiment with a completely randomized design. Solid mixture: soil consisting of: 0: 1, 1: 3; 1:2, and 1 : 1 (volume/volume) of decanter solid. NPK fertilizer rate consist of: 23, 46, 69, and 92 g/seedling. There were 16 treatment combinations with four replications. The results showed that mixing solid in the media resulted in  the growth increament of oil palm seedlings in MN which was the similar as soil media solely. However, the root system of these seedlings is more developed in soil media than in media containing solid decanters. While the difference in NPK rates results in the similar growth increament of oil palm seedlings.
Co-Authors Imam Prasetyo Sri Manu Rohmiyati Suprih Wijayani