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Tampubolon, Koko
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Agriculture, Biological Sciences & Forestry

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KEANEKARAGAMAN GULMA PADA INTEGRASI KELAPA SAWIT DENGAN PADI SAWAH Alridiwirsah, Alridiwirsah; Lubis, Efrida; Tampubolon, Koko; Alqamari, Muhammad; Cemda, Abdul Rahman
Jurnal Agrotek Tropika Vol 10, No 2 (2022): JURNAL AGROTEK TROPIKA VOL 10, MEI 2022
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v10i2.5786

Abstract

Kehadiran gulma pada areal pertanaman utama dapat dipengaruhi kondisi lingkungan, seperti intensitas cahaya akibat sistem integrasi. Tujuan penelitian ini untuk mendapatkan dominansi dan keanekaragaman gulma pada fase vegetatif dan generatif tanaman padi sawah yang diintegrasikan dengan kelapa sawit. Penelitian ini dilaksanakan di Desa Sungai Sentang, Kecamatan Kualuh Hilir, Kabupaten Labuhanbatu Utara, Sumatera Utara, Indonesia pada Oktober 2015 sampai Februari 2016. Penelitian ini menggunakan tanaman kelapa sawit umur 4 tahun (TM-1) dengan pola pengaturan populasi 100%, 75%, dan 50%. Tanaman padi sawah ditanam sebagai tanaman sela, kemudian dibuat petak identifikasi gulma dan dihitung indeks keanekaragaman spesies. Gulma Lindernia anagallis (10,11%) dan Leersia hexandra (19,98%) ditemukan dominan pada fase vegetatif dan generatif tanaman padi sawah yang diintegrasikan dengan kelapa sawit. Nilai indeks keanekaragaman gulma tergolong sedang baik pada fase vegetatif maupun generatif (2,709 dan 2,052). Diantara famili, Cyperaceae lebih banyak tumbuh pada fase vegetatif (42,77%) maupun generatif (35,62%).
Dampak Defisiensi dan Toksisitas Hara Magnesium terhadap Karakteristik Agronomi dan Fisiologi Padi Gogo Novita, Aisar; Tampubolon, Koko; Julia, Hilda; Fitria, Fitria; Hapsani Hasan Basri, Arie
Agrotechnology Research Journal Vol 6, No 1 (2022): Agrotechnology Research Journal
Publisher : Perkumpulan Agroteknologi/Agroekoteknologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.378 KB) | DOI: 10.20961/agrotechresj.v6i1.59834

Abstract

Deficiency or excess magnesium in the soil can affect the vegetative and generative growth of plants. This study aimed to identify the effect of magnesium deficiency and toxicity on the agronomic and physiological characteristics of upland rice. The study was conducted on farmers' land, Medan Selayang Subdistrict, Medan City, from June 2021 to January 2022. This study used a non-factorial randomized block design, namely the application of 27% MgO fertilizer based on the deficiency rates, (0; 1/2; 1/4; 1/8; 1/16; 1/32 times), while the toxicity levels include 0; 2; 4; 8; 16; 32-times within three replicates. The results showed that Mg deficiency significantly inhibited the growth of plant height; leaf area; total chlorophyll SPAD; panicle length; shoot dry weight; and yield.ha-1 were 20.68; 26.77; 19.23; 22.60; 44.20; and 50.72%, respectively. The Mg toxicity significantly inhibited the growth of the leaf area, the number of tillers, number of productive tillers, shoot dry weight, and root dry weight were 14.24; 32.15; 42.87; 34.07; and 44.31%, respectively. The critical limit (BK50) for upland rice caused by deficiency and toxicity of Mg were 0.032 and 1125.189 g/10 kg of the soil, respectively.
Co-Authors Alridiwirsah Cemda, Abdul Rahman Fitria Fitria Hapsani Hasan Basri, Arie Hilda Julia Lubis, Efrida Muhammad Alqamari