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English: Bahasa Indonesia Lestari, Shyntiya Ayu; Putri, Dian Kemala
Jurnal Rekayasa Sistem Industri Vol. 13 No. 2 (2024): Vol. 13 No. 2 (2024): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jrsi.v13i2.7773.1-16

The concentration of studies is very important to support students in understanding the theory and understanding the concepts during learning activities so this needs to be noted so that students can achieve good learning outcomes. Studying while working will certainly cause serious problems to the process of activities on campus and at work. Problems that often occur are piling up tasks, difficulty managing time, fatigue, disputes between colleagues and superiors, a toxic work environment, limited rest time, being expelled from university, and experiencing a delay in graduation. These can trigger job stress for students because they have to do two activities in their daily lives. This study aims to find out the effect of job stress levels on study concentration in working students. In addition, this study analyzes the factors that influence job stress and study concentration. The method used is quantitative analysis with a non-probability sampling technique with a purposive sampling technique. The analysis of data carried out was a Chi-Square test and t-test. Based on the results shows that students who study while working have a very high level of job stress which causes a decrease in learning concentration in students. In addition, several factors influence job stress and study concentration, namely gender, age, type of work, and length of work duration. This research contributes to providing an overview and consideration to students about students who study while working.

PENGARUH JENIS DAN INTERVAL WAKTU PEMBERIAN NUTRISI TERHADAP PERTUMBUHAN DAN PRODUKSI KAILAN PADA SISTEM HIDROPONIK RAKIT APUNG Safitri, Bunga; Pribadi, Edi Minaji; Kurniasih, Ratih; Lestari, Shyntiya Ayu
Jurnal Pertanian Presisi (Journal of Precision Agriculture) Vol 9, No 1 (2025)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/jpp.2025.v9i1.12913

Kailan merupakan jenis sayuran yang kaya vitamin dan mineral. Sistem hidroponik rakit apung adalah teknik budidaya modern dengan akar tanaman terendam dalam larutan nutrisi. Penelitian ini bertujuan untuk menganalisis pengaruh interval waktu pemberian dan jenis nutrisi terhadap pertumbuhan dan produksi tanaman kailan pada sistem hidroponik rakit apung. Desain penelitian menggunakan Rаncаngаn Kelompok Lengkap Teracak (RKLT) dengan dua faktor yaitu jenis nutrisi (AB Mix racikan/N1, Goodplant/N2 dan AHL/N3) dan interval waktu pemberian nutrisi (5 hari sekali/I1 dan 10 hari sekali/I2) dengan 6 ulangan. Parameter yang diukur meliputi tinggi tanaman (cm), jumlah daun (helai), luas daun (cm2), diameter batang (mm), panjang akar (cm), bobot basah tajuk (g), bobot basah akar (g), bobot basah total (g), bobot kering tajuk (g), bobot kering akar (g) dan bobot kering total (g). Hasil penelitian menunjukkan bahwa pemberian jenis nutrisi berpengaruh nyata terhadap parameter tinggi tanaman, jumlah daun, diameter batang, bobot segar total, bobot segar tajuk, bobot segar akar, bobot kering total, bobot kering tajuk dan bobot kering akar. Namun interval waktu pemberian nutrisi tidak berpengaruh nyata dan tidak ada interaksi antara jenis nutrisi dan interval waktu pemberian terhadap pertumbuhan dan produksi kailan sistem rakit apung.

Produksi Biomassa Stevia (Stevia rebaudiana B.) pada Perbedaan Umur Panen dan Tinggi Pangkas Aditya, Alvinsyach; Miska, Moh Ega Elman; Yulianti, Fitri; Lestari, Shyntiya Ayu
Jurnal Agroekoteknologi Vol 17, No 1 (2025)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v17i1.31085

Tanaman stevia (Stevia rebaudiana B.) merupakan tanaman obat yang memiliki daun manis dan dapat digunakan sebagai pemanis alami. Stevia dapat menjadi alternatif pengganti gula tebu yang memiliki manfaat sebagai obat diabetes, hipertensi dan obesitas. Stevia telah banyak dibudidayakan dan digunakan di banyak negara seperti Malaysia, Korea, China dan Singapura. Penelitian dilakukan pada bulan April sampai dengan Juli 2024 di perkebunan Gunadarma University Technopark (UG-TechnoPark). Penelitian ini dilakukan dengan metode Rancangan Acak Kelompok Lengkap (RAL) faktorial yang terdiri dari 2 faktor (3 × 3) yaitu faktor I (umur panen) yang terdiri dari 3 taraf yaitu 80 HSS (R1), 100 HSS (R2), dan 120 HSS (R3). Faktor II (tinggi pemangkasan) yang terdiri dari 3 taraf yaitu 5 cm (P1), 10 cm (P2), 15 cm (P3). Setiap perlakuan diulang sebanyak 4 kali ulangan sehingga terdapat 36 satuan percobaan. Hasil penelitian menunjukkan bahwa umur panen dan tinggi pemangkasan stevia tidak berpengaruh nyata terhadap pertumbuhan dengan parameter luas daun. Umur panen berpengaruh nyata terhadap hasil biomassa dengan parameter bobot tajuk, panjang tajuk, bobot basah daun, dan bobot kering daun yang menunjukkan bahwa semakin panjang (120 HSS) stevia dipanen terlebih dahulu maka hasil biomassa yang dihasilkan semakin banyak. Tinggi pemangkasan berpengaruh nyata terhadap persentase tanaman yang hidup setelah panen dan jumlah daun yang tertinggal, hal ini menunjukkan bahwa pemanenan stevia memerlukan ketinggian minimal 15 cm dari permukaan tanah.

The Ability of Several Biological Agents to Induce Resistance of Rice from Pyricularia oryzae Attacks In Vitro and In Vivo: Kemampuan Beberapa Agens Hayati dalam Menginduksi Ketahanan Tanaman Padi dari Serangan Pyricularia oryzae secara In Vivo dan In Vitro Lestari, Shyntiya Ayu; Ramdan, Evan Purnama; Risnawati, Risnawati; Pribadi, Edi Minjai
Jurnal Proteksi Tanaman (Journal of Plant Protection) Vol. 6 No. 1 (2022): June 2022
Publisher : Plant Protection Department, Faculty of Agriculture, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.6.1.1-12.2022

Rice (Oryza sativa Linnaeus) is the main food crop that is needed daily for the majority of Indonesian people. One of the diseases that increase rice production is the attack of pests and other diseases caused by Pyricularia oryzae. Biological agents are an alternative to control this disease. Therefore, the aim of this study was to determine the effectiveness of the induction of rice plant resistance using several biological agents against blast disease. The study was carried out in 2 stages, the first in vivo using a Randomized Block Design consisting of 4 biological agent treatments, namely Trichoderma sp., Bacillus subtilis, Pseudomonas fluorescens and sterile Aquades (control) which was repeated 6 times with each replication consisted of 3 plant samples so that the total number of samples observed was 72 plant samples. The second stage was carried out in vitro by inoculating P. oryzae on 3 pieces of rice plant leaves as a result of in vivo experiments. The design used was a completely randomized design with 4 agent treatments which were repeated 6 times. The results showed that the induction of rice plant resistance with P. fluorescens was able to reduce the severity of disease caused by P. oryzae attack (72.22%), with a decrease in efficacy of 25.48%, and the lowest AUDPC (691.66). In general, the resistance induction did not affect rice growth, but Trichoderma sp and P. fluorescens were able to increase the grain weight produced (3.11 and 2.80 g per plant, respectively).

English: Bahasa Indonesia Lestari, Shyntiya Ayu; Putri, Dian Kemala
Jurnal Rekayasa Sistem Industri Vol. 13 No. 2 (2024): Vol. 13 No. 2 (2024): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jrsi.v13i2.7773.1-16

The concentration of studies is very important to support students in understanding the theory and understanding the concepts during learning activities so this needs to be noted so that students can achieve good learning outcomes. Studying while working will certainly cause serious problems to the process of activities on campus and at work. Problems that often occur are piling up tasks, difficulty managing time, fatigue, disputes between colleagues and superiors, a toxic work environment, limited rest time, being expelled from university, and experiencing a delay in graduation. These can trigger job stress for students because they have to do two activities in their daily lives. This study aims to find out the effect of job stress levels on study concentration in working students. In addition, this study analyzes the factors that influence job stress and study concentration. The method used is quantitative analysis with a non-probability sampling technique with a purposive sampling technique. The analysis of data carried out was a Chi-Square test and t-test. Based on the results shows that students who study while working have a very high level of job stress which causes a decrease in learning concentration in students. In addition, several factors influence job stress and study concentration, namely gender, age, type of work, and length of work duration. This research contributes to providing an overview and consideration to students about students who study while working.

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