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All Journal Jurnal Lahan Suboptimal JURNAL ILMU PERTANIAN
Rofiqoh Purnama Ria
Faculty Of Agriculture, Universitas Sriwijaya, Indonesia
Agriculture, Biological Sciences & Forestry

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Effects of Water Table, Population Density and Transplanting Time on Vegetative Growth of Black Sticky Rice at Floating Seedbed Method Rofiqoh Purnama Ria; Benyamin Lakitan; Zaidan P. Negara
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 9 No. 2 (2020): JLSO
Publisher : Research Center for Sub-optimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33230/JLSO.9.2.2020.482

Abstract

Ria RP, Lakitan B, Negara ZP. 2020. Effects of water table, seedling density and transplanting time on vegetative growth of black sticky rice at floating seedbed. Jurnal Lahan Suboptimal : Journal of Suboptimal Lands  9(2): 167-174.Study on black sticky rice cultivation in South Sumatera is seldom carry out. The objective of this study was to evaluate the effect of water table and population density on the growth of rice during seedling preparation at floating seedbed; furthermore, this study aimed to evaluate the effect of transplanting time on vegetative growth of black sticky rice. The research was started in May 2018 in Palembang. Black sticky variety used in this research was Toraja variety. The raft used is made from 1,5 l plastic bottles which are arranged to reach  2x1 meters in size. This study was conducted by two stages. The first stage was for water table and population density treatments laid on split plot design. The second stage was for transplanting time utilizing completely randomized factorial design. Statistically, results showed water table and population density significantly influensced root length of black sticky rice and transplanting time 14 DAS haad an effect on the leaf length , leaf width and leaf area.
Morphological Model and Visual Characteristic of Leaf, and Fruit of Citrus (Citrus sinensis) Strayker Ali Muda; Benyamin Lakitan; Dora Fatma Nurshanti; Fitra Gustiar; Rofiqoh Purnama Ria; Fitra Fadhilah Rizar; Lya Nailatul Fadhilah
AGRIUM: Jurnal Ilmu Pertanian Vol 26, No 2 (2023)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/agrium.v26i2.13743

Abstract

Citrus is a well-known horticultural plant and consumed. Leaf and fruit are important citrus organs as a fruiting plant. This is confirmed by the vitamin, antioxidant, and other chemical content of these organs which are beneficial for the human health. Understanding the model of both organs will facilitate the potential content, functional capacity and plant yield in non-destructive way. The study was aimed to determine morphological model and visual characteristic of leaf, and fruit of citrus. The study was conducted by comparing direct measurement and finding the relationship with selected predictors using several regression types (i.e. linear, linear with zero intercept, exponential, logarithmic, polynomial, polynomial with zero intercept and power). The observational sample consisted of 100 leaves and 13 fruits of citrus randomly collected from healthy, normal and productive plants. The results showed that leaf length (LL) × leaf width (LW) was the most reliable predictor using the linear regression with zero intercept (R2= 0.991; y= 0.604x; RMSE= 0.34). Meanwhile, fruit circumference (FC) has been shown cannot be used as a predictor in determining fruit weight as indicated by low reliability. Based on the visual approach, ripe citrus is shown by the yellowish-green color of the peel along with the orange color of the pulp. Furthermore, in the middle of the ripened fruit pulp, there are also white stringy stuff. In conclusion, LL × LW with zero intercept regression is demonstrated the most reliability model for leaf area, while fruit circumference could not represent fruit weight.
Co-Authors Benyamin Lakitan Dora Fatma Nurshanti Fitra Fadhilah Rizar Fitra Gustiar, Fitra Lya Nailatul Fadhilah Strayker Ali Muda Zaidan P. Negara