Garuda - Garba Rujukan Digital

A.T Soejono

Unknown Affiliation

Author-ID : 6286387

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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KOMPOSISI DAN DOMINANSI GULMA KEBUN KELAPA SAWIT PADA TANAMAN BELUM MENGHASILKAN DAN TANAMAN MENGHASILKAN Betty Yuniasih; A.T Soejono; Dzuk Ulinnuha
AGROISTA : Jurnal Agroteknologi Vol. 1 No. 2 (2017): NOVEMBER
Publisher : Program Studi Agroteknologi INSTIPER

Weed is one of the problems in palm oil plantation. The research aims to determine the compositions and the dominance of the weeds in immature and mature stages then compare the weeds compositions between both. The research was conducted in Pelalawan Districk, Riau Province, from March to May 2017. The research was conducted by descriptive method. Sample was taken using a square plot measuring 1x1 meter with 10 replications. The plot sample was taken in a circle in immature plantings and in path mature plantings. The result shows that the diversity of the weeds was higher in immature plantings (18 species) than in mature stage (10 species). Weeds composition in palm oil plantation is much greater during the immature phase rather than mature phase because the high spaces and the high of sunlight in immature phase offer opportunity for the weeds to grow ubiquitously. None of the species in immature plantings are dominant species but in mature plantings there is one dominant species namely Nephrolepis bisserata. Perennial weeds species is a dominant weed type of both phase. The weeds compositions of immature and mature plantings shows the different compositions based on similarity index (IS Sorensen) that caused by the different environment condition. The weeds that found in mature plantings are a type of shade tolerant weeds. Nephrolepis bisserata, dominant species in mature plantings, is a shade tolerant species which can also increase air humidity and decrease the air temperature.

PENGARUH DOSIS HERBISIDA GLIFOSAT TERHADAP BEBERAPA JENIS GULMA UTAMA PERKEBUNAN KELAPA SAWIT Hangger Gahara Mawandha; A.T Soejono; Fiona Alfani
AGROISTA : Jurnal Agroteknologi Vol. 2 No. 1 (2018): MEI
Publisher : Program Studi Agroteknologi INSTIPER

This research aims to know the dosage of herbicide glyphosate is effective and efficient against the sensitivity of Imperata cylindrica, Chromolaena odorata, Cyperus rotundus. This research was carried out on the fields of education and research (KP2) Institute for agriculture Stiper Yogyakarta which is located in the Subdistrict of Depok, Maguwoharjo, Sleman Regency, Yogyakarta special region province. Implemented in December 2016 until January 2017. This study used a factorial experiment method which consisted of two factors, which are arranged in a randomized complete design (RAL), the first factor is a type of weed that consists of three types, namely, Imperata cylindrica, Chromolaena odorata, Cyperus rotundus. The second factor is the level of dose consisted of 3 levels namely controls, 5 l/ha, and 6 l/ha. The data were analyzed using a analysis of varience and to know the difference between the treatment performed testing using the DMRT (Duncan Multiple Range Test) on the real level of 5%. The results of the analysis of the three kinds of weed applied herbicide doses 5 l/ha and 6 l/ha glyphosate treatment, dosage 6 l/ha is efficient in controlling Cyperus rotundus, while treatment of glyphosate doses of 6 l/ha control Imperata cylindrica and effective Chromolaena odorata. Cyperus rotundus is the weed with a high level of sensitivity towards the treatment of herbicide dose 5 l/ha and 6 l/ha. Keywords : Imperata cylindrica, Chromolaena odorata, Cyperus rotundus, dose levels of the herbicide glyphosate

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