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Belajar - Berlatih - Sejahtera
LEARN - PRACTICE - BE RICH
Belajar - Berlatih - Sejahtera
LEARN - PRACTICE - BE RICH
Belajar - Berlatih - Sejahtera
LEARN - PRACTICE - BE RICH
Belajar - Berlatih - Sejahtera
LEARN - PRACTICE - BE RICH
Belajar - Berlatih - Sejahtera
LEARN - PRACTICE - BE RICH
Belajar - Berlatih - Sejahtera

PUBLIKASI ILMIAH DOSEN JURUSAN MANAJEMEN PERTANIAN LAHAK KERING

POTENSI CRYOPRESERVASION BENIH KOPI ARABIKA: PENGARUH POTENSIAL OSMOTIK DAN DURASI OSMOCONDITIONING TERHADAP VIABILITAS DAN INDEKS VIGOR HIPOTETIK BENIH

Yosefina Lewar, Maria Klara Salli, Olivina S. Messakh

 Abstrak. Cryopreservasion Potency of Coffea arabica Seed: Influence of Potential Osmotic and Osmoconditioning Duration to Viability and Hypothetic Vigor Index of Seed. This research aimed to prove the influence of potential osmotic and osmoconditioning to cure the seed viability and hypothetic vigor index of Coffea arabica as the result of draining or degradation of seed water until 12%. This research was an early step to test cryopreservasion potency of Coffea arabica seed, arranging factorially in Completely Randomized Design, consisting of two factors that are three potential osmotic levels (P): -0.5 Mpa; -1.0 MPa and -1.5 Mpa; and 3osmoconditioning duration level (D): 3, 5, and 7 days; and control (without osmoconditioning). Variables measured were electrical conductivity, free fat acid contents, radicel growth, time required for reaching 50% seed germination (T50), seed viability and hypothetic vigor index. Data obtained were analyzed using Analysis of Variance, and Duncan Multiple Range Test (DMRT) at 5%. The result indicated that potential osmotic -0.5 MPa of osmoconditioning performed best influence to T50. Potential osmotic of -1.5 MPa presented best effect to seed viability and hypothetic vigor index. Five days Osmoconditioning performed best influence to time T50. Potential osmotic -0.5 MPa of 3-days osmoconditioning presented best influence to free fat acid contents and seed viability. Potential osmotic -0.5 MPa of 5-days osmoconditioning performed best influence to free fat acid contents and radicel growth. Potential osmotic -1,0 MPa and 5-days osmoconditioning were best affected to seed viability; while, potential osmotic -1.5 MPa of 5-days osmoconditioning also performed best influence to seed viability, and potential osmotic -1.5 MPa of 7-days were significant to seed viability and electrical conductivity of Coffea arabica.Keywords: cryopreservasion, potential osmotic, osmoconditioning duration, Coffea arabica

 

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KAJIAN KERAPATAN TANAMAN TERHADAP PERTUMBUHAN DAN HASIL TANAMAN TOMAT (Lycopersicum esculentum Mill) VARIETAS BETAVILA YANG DI PANGKAS PUCUK APIKAL

Maria Klara Salli, Yosefina Lewar

 Abstrak. The productivity of tomato plants in East Nusa Tenggara (NTT) in 2016 reached 4.70 tons/ha, increasing by 17.66% from 2015. However, the harvested area decreased by 6.74%. Based on the above data, there is an increase in tomato productivity in NTT but still low compared to national productivity of 15.31 tons/ha. Some of the possible differences in productivity, in addition to the decline in harvested area are also caused by inadequate cultivation techniques that include plant density regulation and other cultivation measures. The purpose of this study was 1) to examine the effect of plant density on growth and yield of tomato plants cut by apical buds and 2) to obtain the best size of plant density that can increase the growth and yield of tomato plants. This study used a randomized block design with a planting distance factor consisting of 8 treatment levels with 4 replications: spacing of 50, 60 cm x 40 cm, 70 cm x 40 cm, 50 cm x 50 cm, 60 cm x 50 cm,   x 50 cm, 60 cm x 60cm, 60 cm x 60 cm and 70 cm x 60 cm. The results showed that plant density had an effect on plant growth, namely stem diameter and number of productive branches, and influenced the yield of tomato plants namely fruit weights, plant density/spacing of 70 cm x 40 cm and 70 cm x 60 cm had the best influence on plant growth and fruit weight per plant highest (1037.19 grams/plant and 907.50 grams/plant) of  betavila variety.

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