scholarly journals PENGARUH PERIODE PENCAHAYAAN TERHADAP PERTUMBUHAN, HASIL DAN KOMPONEN MINYAK TANAMAN MENTHA (Mentha piperita L.)

2020 ◽  
Vol 10 (1) ◽  
pp. 12
Author(s):  
ROSIHAN ROSMAN ◽  
SRI SETYATI HARJADI ◽  
SUGENG SUDIATSO ◽  
SUDIRMAN YAHYA ◽  
BAMBANG SAPTA PURWOKO ◽  
...  
Keyword(s):  
Growth Yield ◽  
Mentha Piperita ◽  
Second Step ◽  
Peppermint Oil ◽  
Growth Morphology ◽  
Medicinal Crops ◽  
Normal Light ◽  
Vegetative And Reproductive Growth ◽  
Effect Of Light

<p>Penelitian yang betujuan mcngkaji pengaruh periode pcncahayaan terhadap petumbuhan, hasil dan komponen minyak tanaman M. piperita L, telah dilakukan di Instalasi Penelitian Balai Penelitian Tanaman Rempah dan Obat, Lembang, Jawa Barat, dai bulan Januari 2000 hingga Juli 2000. Penelitian dilakukan dua tahap. Tahap pertama membuat variasi lingkungan cahaya dan tahap kedua penyulingan dan analisis komponen minyak dengan kromatograi gas spektrometer massa. Penelitian menggunakan rancangan acak kelompok 5 perlakuan, yaitu I^&gt; (panjang hari normal sebagai kontrol), L, (pemutusan periode gelap 1 jam, pukul 21.00-22.00 mulai umur 30 hari), Lj (pemutusan peiode gelap 1 jam, pukul 21.00-22.00 mulai umur 60 hai), Lj (penambahan cahaya 4 jam, pukul 18.00-22.00 mulai umur 30 hai), dan U (penambahan cahaya 4 jam, pukul 18.00-22.00 mulai umur 60 hari). Hasil penelitian menunjuk¬ kan bahwa perubahan lingkungan mengubah fcnologi tanaman M. piperita L, meliputi petumbuhan vegetatif dan reproduktif, yang selanjutnya mempengaruhi sintesis menthol. Penambahan cahaya 4 jam mulai umur 30 hari setelah tanam (Li) memberikan petumbuhan vegetatif dan reproduktif paling baik, dengan ciri-ciri morfologi tanaman sebagai berikut tanaman berbunga, batang tegak (tidak rebah), tanaman tinggi, diameter batang besar, jumlah ruas banyak, stolon sedikit, jumlah daun banyak dan lebar. Fcnologi tanaman yang mcmiliki petumbuhan vegetatif dan reproduktif yang baik dapat menghasilkan produksi tema dan minyak yang tinggi. Perubahan fcnologi tanaman akibat manipulasi lingkungan mengubah komponen minyak dan mutu menthol. Fcnologi tanaman yang memiliki petumbuhan vegetatif maupun reproduktif yang baik menghasil¬ kan menthol tinggi dan menthofuran rendah. Penambahan cahaya 4 jam mulai umur 30 hari setelah tanam menghasilkan minyak dengan kadar menthol paling tinggi yaitu 54.89% dan menthofuran paling rendah yaitu 7.83%.<br /><br />Kata kunci: Hasil, komponen, minyak peppermint, Mentha piperita L., peiode pcncahayaan</p><p> </p><p><strong>ABSTRACT</strong></p><p>Effect ofphotoperiod on the growth, yield and component ofpeppermint oil<br /><br />Research on the effect of photoperiod on the growth, yield and component of peppermints oil of M. piperita, was carried out in the expeimental garden of the Institute for Spice and Medicinal Crops, Lembang West Java, from January to July, 2000. The study was conducted in two steps, i.e. The irst step was manipulation of photo peiod using TL lamps and the second step was distillation and analisis of peppermint oil from their products with gas chromatography and mass spectromctry. The experiment used ive treatments, i.e. (1) control or normal light peiod, (2) four hours light supplement at the age of 30 days and 60 days ater planting, and (3) one hour interruption of dark peiod at the age of 30 days and 60 days. The result showed that the changes in light peiod affected the phenology of the crop. Four hours light supplement at the age of 30 days gave the best vegetative and reproductive growth (morphology of Mentha piperita i.e. flowering, erect stem, tall, wide, large stem, more internodes, leafy, and developed only few stolons). This morphology also resulted in the highest resh mateial and oil product. The change of phenology as the effect of light peiode manipulation could change oil component and inally the quality of menthol. Four hours light supplement at 30 days ater planting showed (he highest menthol content (54.89%) and the lowest menthofuran (7.83%).<br /><br />Keywords: Mentha piperita L., component, photoperiod, yield, peppermint oil</p>

scholarly journals PENGARUH PEMOTONGAN BUNGA, PUCUK DAN PENGHENTIAN PENAMBAHAN CAHAYA PADA TANAMAN MENTHA (Mentha piperita L.)

2020 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
ROSIHAN ROSMAN ◽  
SRI SETYATI HARJAD ◽  
SUGENG SUDIATSO ◽  
SUDIRMAN YAHYA ◽  
BAMBANG SAPTA PURWOKO ◽  
...  
Keyword(s):  
Flowering Plants ◽  
Light Period ◽  
Mentha Piperita ◽  
Second Step ◽  
Peppermint Oil ◽  
Long Day ◽  
Terminal Bud ◽  
Medicinal Crops ◽  
Normal Light ◽  
Experimental Garden

<p>ABSTRAK<br />Penelitian bertujuan mengkaji pengaruh pemotongan bunga, pucuk<br />dan penghentian pencahayaan pada tanaman M. piperita L. Penelitian<br />dilakukan di Instalasi Penelitian Lembang, Balai Penelitian Tanaman<br />Rempah dan Obat, Jawa Barat, dari bulan Januari sampai Juli 2000, dalam<br />dua tahap : tahap pertama membuat variasi lingkungan cahaya dan habitus<br />tanaman, dan tahap kedua penyulingan dan analisis komponen minyak<br />dengan kromatografi gas spektrometer massa. Penelitian menggunakan<br />tanaman yang tidak berbunga akibat panjang hari normal dan tanaman<br />berbunga akibat penambahan cahaya empat jam, pukul 18.00-22.00 mulai<br />umur 30 hari. Penelitian menggunakan rancangan acak kelompok 5<br />perlakuan, yaitu B 0 (tanaman berbunga dibiarkan), B 1 (tanaman berbunga<br />dipotong bunganya), B 2 (tanaman berbunga diletakkan pada kondisi<br />normal), B 3  (tanaman tidak berbunga dibiarkan), dan B 4 (tanaman tidak<br />berbunga dipotong pucuk). Hasil penelitian menunjukkan bahwa<br />pemotongan bunga meningkatkan mentol dan menekan menthofuran.<br />Penghentian penambahan cahaya 4 jam pada tanaman berbunga<br />menjadikan tanaman merunduk, kadar mentol menurun dan menthofuran<br />meningkat. Pemotongan pucuk dapat menurunkan kandungan mentol dan<br />meningkatkan kandungan menthofuran.<br />Kata kunci : Mentha, Mentha piperita L., pemotongan bunga, pucuk,<br />pencahayaan, kandungan mentol, kandungan menthofuran</p><p><br />ABSTRACT<br />The effect of inflorescent pinching , bud pinching, and<br />normal light period on peppermint (Mentha piperita L)<br />Experiment on the effect of pinching the inflorescent, pinching the<br />bud, and normal light period on peppermint (Mentha piperita L) was<br />carried out at the experimental garden Lembang of Research Institute for<br />Spice and Medicinal Crops, West Java, from January to July, 2000. The<br />study was conducted with two steps i.e. The first step was manipulation of<br />photo period using TL lamps and the second step was distillation and<br />analisis of peppermint oil from their products with gas chromatography<br />and mass spectrometry. The experiment, 5 treatments were given i.e.<br />using long day treated plants, 3 treatments are given i.e. control, pinching<br />the inflorescent and with holding light supplement (four hours light<br />supplement at the age of 30 days), and using control plants, 2 treaments<br />are given i.e. no pinching and pinching of terminal bud (control or normal<br />light period). The result showed that pinching the inflorescent elevate the<br />menthol and reduce the menthofuran content. Pinching the bud of non<br />flowering plants can reduce the menthol and increase the menthofuran<br />content.<br />Key words : Peppermint, Mentha piperita L, inflorescent pinching, bud,<br />pinching, light period, menthol content, menthofuran content</p>

scholarly journals BIOSINTESIS MENTHOL PADA BERBAGAI PERIODE PENCAHAYAAN TANAMAN MENTHA (Mentha piperita L.)

2020 ◽  
Vol 13 (1) ◽  
pp. 8
Author(s):  
ROSIHAN ROSMAN
Keyword(s):  
No Reduction ◽  
Light Period ◽  
Control Treatment ◽  
Mentha Piperita ◽  
Second Step ◽  
Oil Composition ◽  
West Java ◽  
Period 2 ◽  
Normal Light

ABSTRAK<br />Penelitian ini bertujuan untuk mengkaji mekanisme sintesis menthol<br />pada berbagai periode pencahayaan tanaman M. piperita L. Penelitian<br />dilakukan di Instalasi Penelitian Balai Penelitian Tanaman Obat dan<br />Aromatik, Lembang, Jawa Barat, dari bulan Januari 2000 hingga Juli 2000.<br />Penelitian dilakukan tiga tahap. Tahap pertama membuat variasi<br />lingkungan cahaya, tahap kedua penyulingan dan analisis komponen<br />minyak dengan kromatografi gas spektrometer massa dan tahap ketiga<br />merunut lintasan biosintesis menthol. Penelitian menggunakan rancangan<br />acak kelompok 5 perlakuan, yaitu L 0 (panjang hari normal sebagai<br />kontrol), L 1 (pemutusan periode gelap 1 jam, pukul 21.00-22.00 mulai<br />umur 30 hari), L 2  (pemutusan periode gelap 1 jam, pukul 21.00-22.00<br />mulai umur 60 hari), L 3 (penambahan cahaya 4 jam, pukul 18.00-22.00<br />mulai umur 30 hari), dan L 4 (penambahan cahaya 4 jam, pukul 18.00-<br />22.00 mulai umur 60 hari). Hasil penelitian menunjukkan bahwa<br />perubahan lingkungan mempengaruhi mekanisme sintesis menthol di<br />dalam tanaman Mentha piperita L. Perubahan lingkungan mengubah<br />lintasan menthol yang selanjutnya mengubah komponen minyak dan mutu<br />menthol. Tingginya kadar menthol dan rendahnya menthofuran pada<br />penambahan cahaya 4 jam terjadi melalui penghambatan pembentukan<br />senyawa menthofuran dengan mereduksi pulegon menjadi menthol,<br />sehingga menthol meningkat, sedangkan pada perlakuan kontrol terjadi<br />oksidasi pulegon ke menthofuran sehingga menthol rendah. Penambahan<br />cahaya 4 jam mulai umur 30 hari setelah tanam menghasilkan minyak<br />dengan kadar menthol paling tinggi yaitu 54,89% dan menthofuran paling<br />rendah yaitu 7,83%.<br />Kata kunci :  Mentha, Mentha piperita L., periode pencahayaan, hasil,<br />komposisi minyak, Jawa Barat<br />ABSTRACT<br />The effect of photoperiod on menthol sysnthesis of<br />Mentha piperita L.<br />Research on the effect of photoperiod on menthol synthesis of<br />Mentha piperita L, was carried out at the Experimental Garden of Institute<br />Reseach for Medicinal and Aromatic Crops, Lembang, West Java, from<br />January until July, 2000. The objective is to study the machanism of<br />menthol synthesis in relation with the manipulation of light periode, three<br />steps were taken: The first step was manipulation of environment using TL<br />lamps (two experiments), the second step was distillation and analisis of<br />peppermint oil from their products with gas chromatography and mass<br />spectrometry, and the third step was tracing the pathway on menthol<br />biosynthesis. At the first experiment, 5 treatments were given i.e. (1)<br />control or normal light period, (2) four hours light supplement at the age of<br />30 days and 60 days after planting, and (3) one hour interruption of dark<br />period at the age of 30 days and 60 days. The result showed that the effect<br />of light period manipulation can change the pathway of menthol<br />biosynthesis and oil component and finally the quality of menthol. Four<br />hours light supplement at the age of 30 days after planting could enhance<br />the menthol content and reduce menthofuran by blocking the reaction from<br />pulegone to menthofuran, so the pulegone was reduced into menthon and<br />menthol. Four hours light supplement at 30 days after planting showed the<br />highest menthol content (54.89%) and the lowest menthofuran (7.83%).<br />Control treatment (normal light period) showed the lowest menthol<br />content, due to no reduction of pulegone into menthon, but pulegone was<br />oxidized into menthofuran. Without additional light the menthol content<br />decreased and the menthofuran content increased.<br />Key words : Mentha, Mentha piperita L., oil composition, photoperiod,<br />yield, West Java

LIGHTING AND PERFORMANCE: AN ANALYSIS ON LIGHTING EFFICIENCY OF ARCHITECTURE STUDIO

2019 ◽  
Vol 1 (1) ◽  
pp. 92
Author(s):  
Fazidah Hanim Husain
Keyword(s):  
Learning Environment ◽  
Comfort Level ◽  
Artificial Lighting ◽  
Level Measurement ◽  
Acceptable Range ◽  
Creative Learning ◽  
Illuminance Level ◽  
And Performance ◽  
Effect Of Light

Lighting is one of the key elements in any space and building infrastructure. Good design for an area in the building requires sufficient light that contributes to the efficiency of the activities. The correct method allows natural light to transmit, reduce heat and glare in providing a conducive learning environment. Light plays a significant influence to the quality of space and contributes focus of the students in an architecture studio. Previous research has shown that the effect of light also controlled emotions, behavior, and mood of the students. The operations of artificial lighting that have been used most of the time in an architecture studio during day and night may create lavishness and inadequacy at the same time. Therefore, this paper focuses on the identifying the quality of light for the architecture studio in UiTM (Perak), to instill a creative learning environment. Several methodologies adopted in this study such as illuminance level measurement using lux meter (LM-8100), and a questionnaire survey in gauging the lighting comfort level from students’ perspective. The study revealed that the illuminance level in the architecture studio is insufficient and not in the acceptable range stated in the Malaysian: Standards 1525:2007 and  not evenly distributed.  The study also concluded that the current studio environment is not condusive and appears monotonous. 

Агрономическая эффективность промышленной (голландской) технологии возделывания картофеля

2018 ◽  
Author(s):  
C. Coy ◽  
A.V. Shuravilin ◽  
O.A. Zakharova
Keyword(s):  
Heavy Metals ◽  
Regression Analysis ◽  
Positive Response ◽  
Growth Yield ◽  
Correlation And Regression Analysis ◽  
Yield And Quality ◽  
Quality Of Products ◽  
High Degree ◽  
The Impact

Приведены результаты исследований по изучению влияния промышленной технологии возделывания картофеля на развитие, урожайность и качество продукции. Выявлена положительная реакция растений на подкормку K2SO4 в период посадки. Корреляционно-регрессионный анализ урожайности и качества клубней выявил высокую степень достоверности результатов опыта. Содержание нитратов и тяжелых металлов в клубнях было ниже допустимых величин.The results of studies on the impact of industrial technology of potato cultivation on growth, yield and quality of products. There was a positive response of plants to fertilizer K2SO4 in the period of planting. Correlation and regression analysis of yield and quality of tubers revealed a high degree of reliability of the results of experience. The contents of nitrates and heavy metals in tubers was below the permissible values.

Drip Irrigation and Stand Establishment Affect Yield and Quality of Cantaloupe

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 545d-545
Author(s):  
D.I. Leskovar ◽  
J.C. Ward ◽  
R.W. Sprague ◽  
A. Meiri
Keyword(s):  
Field Experiments ◽  
Irrigation System ◽  
Fruit Size ◽  
Growth Yield ◽  
Vegetable Production ◽  
Silty Clay ◽  
Dry Land ◽  
Stand Establishment ◽  
Yield And Quality

Water pumping restrictions of high-quality irrigation water from underground aquifers is affecting vegetable production in Southwest Texas. There is a need to develop efficient deficit-irrigation strategies to minimize irrigation inputs and maintain crop profitability. Our objective was to determine how growth, yield, and quality of cantaloupe (Cucumis melo L. cv. `Caravelle') are affected by irrigation systems with varying input levels, including drip depth position and polyethylene mulch. Stand establishment systems used were containerized transplants and direct seeding. Field experiments were conducted on a Uvalde silty clay loam soil. Marketable yields increased in the order of pre-irrigation followed by: dry-land conditions, furrow/no-mulch, furrow/mulch, drip-surface (0 cm depth)/mulch, drip-subsurface (10-cm depth)/mulch, and drip-subsurface (30 cm depth)/mulch. Pooled across all drip depth treatments, plants on drip had higher water use efficiency than plants on furrow/no-mulch or furrow/mulch systems. Transplants with drip-surface produced 75% higher total and fruit size No. 9 yields than drip-subsurface (10- or 30-cm depth) during the first harvest, but total yields were unaffected by drip tape position. About similar trends were measured in a subsequent study except for a significant irrigation system (stand establishment interaction for yield. Total yields were highest for transplants on drip-subsurface (10-cm depth) and direct seeded plants on drip-subsurface (10 and 30 cm depth) with mulch.

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