Indra Dwipa
Postgraduate, Andalas University, Padang, 25163, Indonesia

Published : 4 Documents
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Aluminium stress examination of Pasaman local brown rice genotypes in early phase Dwipa, Indra
JERAMI Indonesian Journal of Crop Science Vol 1 No 2 (2019): JIJCS
Publisher : Department of Crop Science, Faculty of Agriculture, Andalas University

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Abstract

One of brown rice resistance is tolerant to Aluminium stress. The research was conducted in Seed Technology Laboratory and shade net house of Faculty of Agriculture, Andalas University form March to June 2017. The research aimed to study the tolerance of 6 Pasaman brown rice genotypes to Al stress. Factorial design in Completely Randomized Design was used in this research. The first factor was brown rice genotypes, Sigambiri,LadangTalamau, SikarojukSilomlomPulen and Perbatasan. The second factor was AlCl3 doses, 0 ppm, 5 ppm, 10 ppm, 15 ppm and 20 ppm. The data was analysed by F test and extended by Duncan’s New Multiple Range Test in 5%. The result showed that there was interaction between Al concentration and 6 brown rice genotypes for height of plant, length of leaves. Based on tolerance level, all genotypes were grouped to Moderate-Tolerant level.
The Influence of Pruning and Differences of Harvest Times Toward Taro Production (Xanthosoma sagittifolium) Ramadhan, Nugraha; Syarief, Zulfadly; Dwipa, Indra
SEAS (Sustainable Environment Agricultural Science) Vol 2, No 2 (2018)
Publisher : Fakultas Pertanian Universitas Warmadewa

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Abstract

This research was conducted in Batusangkar, West Sumatera using factorial research in the form of randomized block design (RBD). The species of Taro that used as the experimental material was Taro type in the age of 4 months. The purpose of this research is (1) to know the interaction between leaves pruning and difference of harvest times to the growth and production of Taro, (2) to know the best leaves pruning for growth and production of Taro (3) to know the best harvest times in order to get the best Taro production. The treatments of leave pruning in this study consisted of; without pruning, pruning by leaving 4 leaves, and pruning by leaving 6 leaves. On the other hand, the harvest times treatment is on 6 months, 7 months, and 8 months. The results showed that the interaction between leave pruning and harvesting times affected taros’ tuber diameter. On the form of tuber wet weight and length, there was no a significant effect due to the treatment provided, yet the pruning by leaving 6 leaves effected to increase the number of tubers and the productivity of Taro. While the best harvest times to increase the productivity of Taro is at the age of 7 and 8 months.
Dinamika Beberapa Sifat Fisika Tanah Dibawah Sistem Usahatani Konservasi Pada Lahan Kritis Aripan Di DTA Singkarak Aprisal, Aprisal; Rusman, Bujang; Dwipa, Indra; Refdinal, Refdinal; Rahmayuni, Erlina; Fajriwandi, Fajriwandi
Jurnal Lahan Suboptimal Vol 5, No 2 (2016): JLSO
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Abstract

Aprisal. et al. Dynamics of Some Physical Properties of Soils Under Conservation Farming System on the Critical Land Aripan in the DTA Singkarak. JLSO 5(2):137-144.The conservation farming on critical land can improve the soil properties and maintantain for a periode of time. The purpose of this research is to study the dynamics of critical land’s physical characteristics under the influence of conservation farming at Singkarak Water Catchment Area (DTA) in Nagari Aripan. The analysis of soil sample is conducted in Soil Science Department Laboratory, Faculty of Agriculture, Andalas University. This research is designed with Split Plot Design (RPT). The main plot is a soil processing system which is: conventional soil processing (po), soil processing with mulch (p1), soil processing with compost and manure (p2) and minimum soil processing (p3), while the sub plot consists of three types of plants, they are; sweet corn (t1), soy bean (t2) and peanut (p3). Each treatment is repeated three times. Result of the research is observation data in each season of the first, second and third year. To see the dynamics of soil characteristics, data of each season is viewed through graphic which based on its trend. The result of the research indicates that utilization of critical land with conservation farming system could repair and maintain some physical characteristics of soil in each growing season, such as: decreasing volume, increasing soil organic matter, porosity, and soil permeability. Productivity of soil increases on the conventional processing with mulch, compost, and manure. Conventional soil processing with added compost and manure increases productivity for 32.58% in the first year, 45.16% in the second year, and 59.73% in the third year.
Effect of Different Seed Water Content and Storage Duration towards Seed Viability of Local Genotype Brown Rice Daro Merah Dwipa, Indra; Muhsanati, Muhsanati
JERAMI Indonesian Journal of Crop Science Vol 1 No 1 (2018): JIJCS
Publisher : Department of Crop Science, Faculty of Agriculture, Andalas University

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Abstract

Most of rice seeds experience after ripening problem which then result in seed dormancy. This kind of dormancy could be broken through various types of treatments, including storaging in dry place for certain period. This study was aimed to evaluate the combination between seed water content and storage duration to induce the seed germination of local genotype brown rice, Daro Merah. Various levels of seed water content (6-10, 11-15, 16-20 and 21-25 %) and storage duration (2, 4, 6 and 8 weeks) were evaluated to identify its effect on Daro Merah seed germination. Data were analyzed using two-way analysis of variance where significance were further proceeded using Duncan’s New Multiple Range Test with a p>0.05. The results showed that seed germination of Daro Merah reached 95 % at five days after seeding when the seed water content was maintained at 6-10% and stored for 8 weeks. After 14 days, the germination reached 99 % and most of the seeds showed some shoots emerged from the soil. Keywords: Brown rice, germination, seed water content, storage duration, Daro Merah