Water Management

Effect of Irrigation Frequency and irrigation Time on Growth and Production of East Indian Galanggale (Kaempferia galangal L.)

Eko Sulistyono(1) and Indriati (2)

(1) Departemen Agronomi dan Hortikultura, Faperta, IPB. Email:pengelolaanair@yahoo.com, ekosulistyono@ipb.ac.id, HP:081310342431. Telp:0251-86380733.
(2) Alumni Departemen Agronomi dan Hortikultura, Faperta, IPB

Abstract

The research was conducted to result F factor value (fraction of available water that could be absorbed by Kaempferia galangal L.). This value was needed for determining irrigation frequency. Factorial experiment was arranged in Randomized Block Design with three replications. The first factor was irrigation frequency included irrigation until field capacity every 2, 4, 6, 8 days respectively, irrigation every 2 days until 75%, 50%, and 25% of available water respectively. The second factor was irrigation time included from planting, 2 weeks before harvesting, and 4 weeks before harvesting until harvesting respectively. Interaction between irrigation frequency and irrigation time effected plant height, leaf area index, evapotranspiration, but did not affect yield. Treatment that resulted the highest plant, the biggest leaf area index and the least evapotranspiration was irrigation until field capacity every 6 days from 4 weeks before harvesting until harvesting. The research resulted F factor value (fraction of available water that could be absorbed by Kaempferia galangal L.) as much as 48%.
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Key word: evapotranspiration, irrigation frequency, East Indian Galanggale.

The Effect of Cu Toxicicty on The Growth and Production of Rice (Oryza sativa L. ) and the remedial measures with Antitoxic Fertilizer

Eko Sulistyono(1) and Fatkhiyatur Rokhmah(2)
(1) Staf Pengajar Agronomi dan Hortikultura, Faperta IPB, e-mail: ekosulistyono@ipb.ac.id
(2) Mahasiswa Departemen Agronomi dan Hortikultura, Faperta IPB

Abstract

The research was conducted to investigate antitoxic fertilizer that improve rice respon to Cu toxicity. The experiment was arranged in randomize complete block design with 2 factors. The first factor was Cu treatment, there were 0 mg/l of Cu (C0), with 300 mg/lof Cu (C1),600 mg/l of (C2), and 900 mg/l of Cu (C3). The second factor was antitoxic fertilizer, there were 0 mg/lof PR (P0), with 0.3 mg/l PR (P1), 0.6 mg/l of PR (P2), and 0.9 mg/l of PR (P3).

The result of observation showed that Cu level gave very significant effect on growth and production except on plant destruction after 12th week. Antitoxic fertilizer (PR) gave unsignificant effect on growth and production except on rice sample dry matter, harvest stems dry matter and leaves dry matter. The interaction between Cu and PR was significant on weight of 100 grain dry matter and the leaves dry matter. Copper critical value was 300 mg/l (P0). Antitoxic fertilizer of 0.6 mg/l could improve rice respon to Cu toxicity.

Key words: Copper toxicity, growth and production, remedial measures and antitoxic fertilizer

The Effect Of Irrigation Schedule on Consumptive Water Use and Yield of Patchouli (Pogostemon cablin)

Eko Sulistyono 1) dan Sandi Yanuar 2)

ABSTRACT
The objective of this research was to study the effect of irrigation schedule on consumptive water use and yield of patchouli. The irrigation schedule treatment was combination between irrigation level and growth phase. Irrigation levels included irrigation until field capacity were applied every day (100%AT1), 3 days (100% AT3), 6 days (100% AT6), 9 days (100% AT9), irrigation until 75% of available water every day (75% AT1), 50 % of available water every day (50% AT1) and 25% of available water every day (25% AT1). The growth phase was described into whole growth phase, 2 weeks before harvest and 4 weeks before harvest.
Results showed that consumptive-water-use ranged from 129.18 cm/4 months to 47.58 cm/4 months that was equivalent to 63379 liter on pot with 25 cm diameter (100% AT3 applied at 4 weeks before harvest) to 23344 liter on pot with 25 cm diameter (25% AT1 applied during whole growth phase), respectively. High water use efficiency was yielded by irrigation level of 50% AT1 or 100% AT6. High productivity was yielded by irrigation level of 50% AT1 or 100% AT3.
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Key words: Irrigation schedule, water use efficiency, available water (AT, air tersedia), Pogostemon cablin

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1) Staf Dosen Dept Agronomi dan hortikultura, Faperta, Institut Pertanian Bogor, Jl Meranti, Kampus IPB Darmaga, Bogor 16680. Telp:081310342431, Fax(251)629353. E-mail: pengelolaanair @yahoo.com.
2) Alumni Dept Agronomi dan Hortikultura, Faperta, IPB.

The Effect of Irrigation Systems on Production and Organoleptic Quality of Tobacco)

Eko Sulistyono1*), Sudradjat 1), M.H. Bintoro 1),Handoko 2) dan Gatot Irianto3)

ABSTRACT

The objective of this research was to study the effect of irrigation system on production and organoleptic quality of tobacco. The treatments were conventional irrigation, drip irrigation added mulch and drip irrigation without mulch. Conventional irrigation was the irrigation system that was usually applied by farmer, plastic pipe was used for conveying water from water resource to field, irrigation was given twice a week. Drip irrigation was given once two days. Drip irrigation plus mulch resulted higher sun cured leaf weight and water used efficiency than conventional irrigation, but it was not significant difference compared with drip irrigation without mulch. Drip irrigation without mulch resulted 5.505 ton/ha of sun cured leaf and water use efficiency as much as 3.4 g of sun cured leaf/kg of water. Organoleptic quality resulted by three irrigation systems were mild to medium, fairly smooth and low irritant.
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Key words: Drip irrigation, mulch, water use efficiency, organoleptic quality, tobacco

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1*) Lecturer of Water Management at Dep Of Agronomy and Horticulture, Bogor Agricultural University, Jl Meranti, Kampus IPB Darmaga, Bogor, Indonesia E-mail: pengelolaanair@yahoo.com, Ph:081310342431
2) Staf pengajar FMIPA, Institut Pertanian Bogor
3) Direktur Pemanfaatan Air Irigasi pada Direktorat Sarana dan Prasarana, Departemen Pertanian Indonesia