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Asil Barus
Program Studi Agroekoteknologi Fakultas Pertanian, USU, Medan
Agriculture, Biological Sciences & Forestry

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Karakter Morfologi Tanaman Kedelai (Glycine max (L.) Merril) Tercekam Kekeringan Melalui Aplikasi Antioksidan Ahmad Sadam; Asil Barus; Mariati
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.45 KB) | DOI: 10.32734/jpt.v5i1.3142

Abstract

Decreasing soybean production can not fulfill the needs of soybeans in Indonesia, one of the main causes is the decreasing of agricultural land. To increase soybean production in Indonesia can be reached by expanding the planting area, namely by utilizing the potential land. This research was conducted in the plastic house of Faculty of Agriculture, the University of Sumatera Utara, Medan with the height of place ± 25 meters above sea level from August 2016 until November 2016, using randomized block design with 2 factors of treatment. the first factor is drought stress with 3 levels ie KL 80%; KL 60%; TOS 40% and the second factor is the provision of antioxidants with 2 kinds of salicylic acid and ascorbic acid. The results showed that drought stress treatment significantly affected the number of empty pods per plant.
Pengaruh Posisi Skarifikasi Benih dan Perendaman Air Kelapa terhadap Perkecambahan Biji dan Pertumbuhan Bibit Sirsak (Annona muricata L.) Arya Agung Pranata; Asil Barus; Meiriani
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (480.816 KB) | DOI: 10.32734/jpt.v5i1.3145

Abstract

The problem of generative propagation of soursop is its seeds take a long time to germinate which are caused by the hard seed coat. The solution to solve that problem is scarification and coconut water soaking to simply the process of imbibition and seed germination and also stimulate the growth of shoot. This objective of the research was to determine the effect of the scarification position and the soaking with various concentrations of coconut water on seed germination and growth of soursop seedling. This research was held at the Faculty of Agriculture field, the University of Sumatera Utara in March - July 2017. The research used a factorial randomized block design with two factors and three replication. The first factor is the scarification position (without scarification, stomach scarification, top scarification) and the second factor is coconut water soaking (0%; 25%; 50%; 75 %). The result of the research showed that the germination rate parameter, germination percentage, crop height, number of leaves, root volume and dry weight of crop significantly higher on without scarification treatment than with scarification treatment. The interaction between the scarification position and soaking with various coconut water concentrations was not significantly affecting the seed germination and growth of soursop seedling.
Tanggap Pertumbuhan Bibit Tebu Merah (Saccharum officinarum L.) Asal Bud Set terhadap Pemangkasan dan Frekuensi Penyiraman Supriadi Hartanto; Irsal; Asil Barus
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (522.528 KB) | DOI: 10.32734/jpt.v5i1.3148

Abstract

This research was conducted to determine the growth of red sugarcane seedling on pruning and frequency of watering. This research was conducted in the research field of Faculty of Agriculture University of Sumatera Utara (± 25 m asl) from June-October 2017 using Factorial Randomized Block Design with three replications. The first factor was pruning (control, 1, and 2 months/plant) as well as the second factor was the frequency of watering (1, 3, 5, and 7 days/plants). The variable observed were plant height, a number of leaves, stem diameter, a number of the tiller, shoot wet weight, root wet weight, and shoot-root ratio. The results showed that the frequency of watering treatment had a significant effect on the number of a leaf (4,6,8,10 and 12 weeks after plant), stem diameter (4,6,8,10 and 12 weeks after plant), shoot wet weight, and root wet weight. Pruning treatment had no significant effect on all variables observed. The interaction of both has no significant effect on all variables observed.
Co-Authors Ahmad Sadam Arya Agung Pranata Irsal Mariati Meiriani Meiriani Supriadi Hartanto