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Jurnal Penelitian Tanaman Industri (Littri)
Published by Pusat Penelitian dan Pengembangan Perkebunan
ISSN : 08538212     EISSN : 25286870     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Penelitian Tanaman Industri (JLITTRI) aims to publish primary research articles of current research topics, not simultaneously submitted to nor previously published in other scientific or technical ojournals. General review articles will not be accepted. The journal maintains strict standards of content, presentation,and reviewing. SCOPE The journal will consider primary research papers from any source if they make an original contribution to the experimental or theoretical understanding and application of theories and methodologies of some aspects of agricultural science in Indonesia including: Estate crops; Soil science; Climate science; Agronomy; Plant breeding; Biotechnology; Genetic resources; Plant pathology; Plant physiology; Entomology; Farming system; Postharvest technology; Socio-economic agriculture; Environment; Agricultural extension. The journal publishes Indonesian or English articles. Since the year of 2017, the jurnal is published twice a year in (June and December).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 6 Documents
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Search results for , issue "Vol 9, No 3 (2003): September, 2003" : 6 Documents clear
FORMULASI FLY SPRAY DARI EKSTRAK PIRETRUM DAN EFFEKTIVITASNYA TERHADAP SERANGGA RUMAH TANGGA SRI YULIANI; . TRITIANINGSIH; SOFYAN RUSLI
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.116-120

Abstract

Telah dilakukan pembuatan formula fly spray dengan bahan aktif utama ekstrak piretrum dan uji efTektivitasnya dilakukan terhadap serangga rumah tangga. Penelitian dimulai dari April sampai Oktober 2001 di Laboratorium Fisiologi Hasil dan Keteknikan, Balinro dan Laboratorium Entomologi, Fakultas Kedokteran Hewan, IPB Komponen formula terdiri dari ekstrak piretrum, minyak serai wangi, minyak wijen, naftalen, pine oil, pclarut pertasol CB dan LAWS. Perlakuan formulasi yaitu dibual variasi konsentrasi ekstrak piretrum ( 0.041% dan 0.052% ), penambahan/tanpa pine oil (0%, 0.1%) dan natalen (0%, 1.0%) serta jenis pclarut (LAWS dan pertasol CB). Uji effektivitas dilakukan terhadap serangga rumah tangga yaitu lalat, nyamuk, semut dan kecoa. Hasil menunjukkan bahwa dua formula yaitu Fi dan F, adalah formula paling effektif terhadap lalat Musca domeslica dan sebagai formula terpilih adalah Fj. Formula ini effektif terhadap nyamuk Culex qumquefasciatus dengan mematikan 92% pada menit ke dua sangat efektif terhadap semut t'onera sp. dengan angka kematian 100% pada menit ke dua, dan kurang effektif terhadap kecoa Blatella germanica menyebabkan kematian 90% pada menil ke 30. Komposisi formula F> terdii dari ekstrak piretrum dengan kadar piretrin 0.041%, minyak serai wangi 0.1%, minyak wijen 3%, natalen 1% dan pelarut LAWS. Pelarut terbaik untuk formula ini adalah LAWS.Kata kunci: Fly spray, Piretrum, formulasi, uji effektivitas, serangga rumah tangga ABSTRACT Fly spray formulation of pyrethrum extract and its effectiveness on housefliesThe production of ly spray formula with active ingredient pyrethrum extract and its efficacy on houselics were conducted from Apil to October 2001 at (he Research Institute for Spice and Medicinal Crops, Bogor and at Entomology laboratory of FKH - IPB. The formula was made from pyrethrum extract, citronella oil, sesame oil, natalein, pine oil and solvent, i.e pertasol CB and LAWS. The parameters observed were the variation concentration of pyrethrum extract (0.041% and 0.051%), added with pine oil (0%, 0.1%), natalein (0%, 1.0%) and solvents (LAWS and pertasol CB). The eficacy lest was conducted on houselies which included housely, mosquito, ant and cockroach. The result showed that F> and Fi were ihe most effective to M. domeslica and Fi is the selected formula. Fi was effective to Cx. qumquefasciatus mosquito which killed 92% of the mosquito in two minutes, and very effective to Ponera sp ants which killed 100% in iwo minutes, and less effective to B. germanica cockroach which killed 90% in half hour. The Fj formula was made from pyrethrum extract with 0.041% piretrin, 0.1% citronella oil, 3% sesame oil, 1% natalein and LAWS solvent LAWS was the best solvent for the formula.Key words : Fly spray, pyrethrum, formulation, efficacy test, houselies
COCONUT PRODUCTION UNDER VARIOUS CROPPING PATTERNS AND ITS CORRELATION TO THE SOIL AND LEAF NUTRIENT ELEMENT DOAH DEKOK TARIGANS
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.81-90

Abstract

i-ow productivity of coconut farm is the main problem of coconut industry. The fact that intercropped palms were more productive than when solely planted, the most suitable way to increase productivity is through multiple cropping. To cope with (he existing variation of cropping pattern in relation to coconut production, soil and leaf nutrient element, various cropping patterns with four species of perennial crop as intercrops were conducted under study. The objectives of the study were (1) to study the effect of cropping patterns on the growth, nut production and farm productivity of coconut under farmer levels, soil chemical propeties and leaf nutrient element and (2) to study the correlation between growth and production parameter with soil chemical propeties and leaf nutrient elements. Various cropping patens under study namely (1) coconut monoculture (control), (2) coconut + pineapple, (3) coconut + coffee, (4) coconuf - papaya ♦ pineapple, (5) coconut + banana + coffee, and (6) coconut + banana + papaya + coffee i pineapple Total area for each cropping patern was 0.5 ha with coconut planting distance 8 m x 10 m and the palms 35-40 years old The site of the experiment conducted was at Silang, Cavite. Data on coconut growth and production, soil chemical properties and leaf nutrient parameters, were statistically analyzed in a randomized complete block design (RCDB) with three replications. Correlation analysis were performed on the following (1) Growlh and production parameters with soil chemical propeties, and leaf nutrient elements, (2) Relationship among nutrient element in the coconut leaves under various cropping paterns Results of the study showed that the effect of cropping patterns on the number of full-grown nul increased signiicantly more nut and higher amounts of copra per tree were produced in intercropped farms than in the mono-cropped coconut plantation. These increase ranged from 64 to 98 percent in terms of nuts and 70 to 105 percent in terms of copra. Positive correlation was observed between nitrogen in the top soil with weight of copra and nut production. The exchangeable potassium in lop soil was positively correlated with nut production. Meanwhile, the organic mater, content in the soil were positively correlated with weight of copra, nut production but negatively correlated with percentage of nul shedding. These results implies that increase organic matter content in the soil will increase coconut production including fruit set Nitrogen concentration in the leaf was positively and highly signiicantly correlated with number of nut shedding These finding suggested that the increased nitrogen concentration in the leaf greatly promotes nul production and fruit set of the palms under various cropping patterns in coconut The potassium in the leaf was significantly correlated with nul production but negatively correlated with percentage of nut shedding. Key words: Coconut production, cropping patterns, soil chemical, leaf nutrient elements, correlationRINGKASAN Produksi kelapa pada beberapa pola tanam dan hubungannya dengan kandungan unsur hara tanah dan daun kelapaRendahnya produktivitas tanaman merupakan masalah utama pada perkebunan kelapa. Salah satu cara untuk meningkatkan produktivitas yaitu melalui penerapan usahatani kelapa campuran. Suatu kenyataan bahwa penerapan intercropping menyebabkan tanaman kelapa lebih produktif dibandingkan dengan tanaman monokultur. Untuk mengetahu sejauh mana pengaruh tersebut secara ilmiah, serta hubungannya terhadap unsur hara tanah dan unsur hara dalam daun kelapa maka dilakukan penelitian secara terencana pada pertanaman kelapa rakyat produktif. Tujuan penelitian ini (1) untuk mengetahui pengaruh pola tanam terhadap petumbuhan dan produksi tanaman kelapa, terhadap unsur hara dalam tanah dan kadar hara daun kelapa dan (2) mcmpelajari korelasi antara parameter petumbuhan dan produksi kelapa dengan hara tanah serta kadar unsur hara daun. Enam polatanam kelapa yang diuji dalam penelitian ini yaitu (1) kelapa monokultur, (2) pola tanam kelapa + nanas, (3) pola tanam kelapa * kopi, (4) pola tanam kelapa + papaya + nanas , (5) pola tanam kelapa + pisang ♦ kopi dan (6) pola tanam kelapa + pisang + papaya ♦ kopi + nanas dimana masing-masing pola tanam seluas 0.5 ha. Jarak tanam kelapa 8 m x 10 m, dengan umur 40-45 tahun. Penelitian dilakukan di Silang, Cavite. Penelitian menggunakan rancangan acak lengkap (randomized complete block design) dengan tiga ulangan. Parameter yang diamali meliputi jumlah daun, jumlah bunga betina (button) per tandan, kadar unsur hara tanah meliputi kandungan bahan organik, pH, CEC, Nitrogen, Phosphor, Calcium, dan Magnesium. Sedangkan unsur hara daun yaitu Nitrogen, Phosphor, Calsium, dan Magnesium. Analisis korelasi dilakukan terhadap (1) pertumbuhan dan produksi kelapa dengan unsur hara tanah, dan unsur hara daun dan (2) hubungan antar unsur hara daun kelapa pada beberapa polatanam kelapa yang ditclili. Hasil penelitian menunjukkan bahwa produksi buah dan kopra pada polatanam campuran lebih tinggi dibandingkan dengan hasil pola tanam kelapa monokultur. Peningkatan produksi buah 64-98 persen dan kopra 70-105 persen. Kadar nitrogen pada lapisan atas tanah mempunyai korelasi positif dengan berat kopra dan produksi buah. Sedangkan unsur kalium pada lapisan tanah yang sama mempunyai korelasi positif dengan produksi buah kelapa Kandungan bahan organik tanah mempunyai korelasi positif dengan berat kopra, produksi buah namun berkorelasi negatip dengan presentase buah yang gugur (nut shedding) Hasil ini berimplikasi bahwa dengan meningkatnya kadar bahan organik tanah akan meningkatkan produktivitas tanaman kelapa. Lebih lanjut, hasil penelitian menunjukkan bahwa kadar nitrogen dan kalium pada daun mempunyai korelasi positif dengan peningkatan produksi kelapa dan persentasi buah yang jadi.Kata kunci: Produksi kelapa, polatanam, unsur hara tanah, kadar unsur daun, analisis korelasi
STABILITAS HASIL BEBERAPA GALUR JARAK RUSIM MARDJONO; HADI SUDARMO; . SUPRIJONO
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.104-108

Abstract

Penelitian mi dilaksanakan di dua lokasi yaitu di Sandubaya (l-ombok Timur. NTB) dan Bayan (I-ombok Barat, NTB) dilakukan pada musim lanam 1998/1999 dan 1999/2000 bulan Nopember 1998 sampai dengan September 2000. Penelitian ini bertujuan unluk mem¬ peroleh galur-galur unggul jarak bcrproduktivitas tinggi, dan spcsiik di Kawasan Timur Indonesia. Galur yang diuji sebanyak 9 galur harapan yaitu RC.67, RC.74. RC.86, RC.104, RC.106, RC.220, RC.221, RC.64, KF.VIII dan sebagai pembanding digunakan 3 varietas komersial yaitu Asembagus 22, Asembagus 60 dan Asembagus 81. Penelitian mengguna¬ kan rancangan acak kelompok dengan ulangan 3 kali. Hasil penelitian menunjukkan 3 galur unggul yaitu RC.67, RC.221 dan RC.64, yang sama potensi dengan varietas Asb.81, mempunyai adaptasi luas (varietas stabil). Dua galur lainnya yaitu RC.74 dan RC.104 beradaplasi sempit (spesiik lokasi) sesuai untuk daerah Bayan Nusa Tenggara BaratKata kunci : Ricmus commums, stabilitas hasil, spesifik lokasi ABSTRACT Yield Stability of Castor LinesThe experiment was conducted in two locations at Sandubaya (East I-ombok) and Bayan (West lombok), in planting session 1998/1999 and 1999/2000 from November 1998 to September 2000 This experiment was aimed to ind oul superior lines of castor, high productivities, that can be developed in speciic dry area in easten pat of Indonesia. The trial was arranged in randomized block design with 3 replications. Nine lines, RC.67, RC.74, RC.86, RC.104. RC.106. RC.220, RC. 221, RC6I, KF.VIII and 3 control varieties, Asembagus 22, Asembagus 60 and Asembagus 81 were used as treatment. Results of this experiment found out 3 superior lines: RC 67, RC.221 and RC.64, which have the same potential with Asb.81 variety, have broad adaptation (stable lines). Two other lines : RC.74 and RC.104 have narrow adaptation (speciic location) just for Bayan. West Nusa Tenggara.Key words: Ricmus commums, yield stability, specific location
PEMANFAATAN BLOTONG DAN FOSFAT ALAM PADA TANAMAN ROSELA DI LAHAN PODSOLIK MERAH KUNING KALIMANTAN SELATAN BUDI SANTOSO; ADJI SASTROSUPADI; . DJUMALI
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.109-115

Abstract

Hasil samping dari limbah pabrik gula diantaranya adalah blotong atau dikenal dengan scbulan "ilter press mud". Secara umum bentuk dari blotong berupa serpihan scrat-scrat tebu yang mempunyai komposisi humus, N-total, C/N, P2O5, K20, CaO dan MgO, cukup baik untuk dijadikan bahan pupuk organik. Blotong dapat memperbaiki isik tanah, khususnya meningkatkan kapasitas menahan air. menurunkan laju pencucian hara dan memperbaiki drainase tanah. Manfaat lain dari blotong dapat menetralisir pengaruh Al<u , sehingga ketersediaan P dalam tanah lebih tersedia. Tujuan penelitian adalah untuk mendapatkan dosis blotong dan pupuk fosfat alam yang sesuai pada tanaman rosela di lahan podsolik merah kuning Kalimantan Selatan. Penelitian dilaksanakan di senlra pengembangan Intensiikasi Serat Karung Rakyat yaitu di daerah tranmigrasi Desa Sabuhur II, Kecamatan Jorong, Kabupaten Tanah Laut, Kalimantan Selatan dari bulan September 1998 sampai dengan bulan April 1999 Kctinggian lempal 50 m di atas permukaan air laut dengan tipe iklim B2 yaitu 2-3 bulan kering dan 7-9 bulan basah. Topografi dataran rendah dan tadah hujan. Perlakuan disusun dalam rancangan acak kelompok faktoial yang diulang sebanyak 3 kali. Sebagai faktor petama adalah blotong dengan dosis : 3, 4, dan S ton per hektar, sedang faktor kedua pupuk fosfat alam dengan dosis : 40: 60, 80, dan 100 kg P,Oj per hektar. Seluruh perlakuan terdiri dari 12 kombinasi blotong dan fosfat alam Ukuran petak yang digunakan 4 m x 6 m dengan jarak tanam 20 cm x 20 cm. Setiap lubang lanam bcrisi satu tanaman Hasil penelitian menunjukkan bahwa pemberian 5 ton blolong + 40 Pj05 per hektar ditambah dengan pupuk dasar 90 kg N * 60 kg K2O menghasilkan pertumbuhan linggi tanaman, diameter batang, berat brangkasan, berat kulil, hasil serat kering dan kckuatan serat rosela, masing-masing sebesar 336.35 cm; 14.73 mm; 536 kg/petak; 147 50 kg'petak; 2.775 ton per hektar dan 31 50 granvtex.Kala kunci: Rosela, blotong, fosfal alam, podsolik merah kuning, Kalimantan ABSTRACT The use ofilter press mud and rock phosphate on roselle cultivation in red yellow podsolic soil in South KalimantanThe waste of sugarcane factory was blotong or called "ilter press mud". As an organic fetilizer, blotong contains C, N-total, C/N, P2OJ, K2O, CaO and MgO. The filter press mud is believed to have the capacity in improving soil physic, especially water rclcntion, leaching ability and drain capacity. Orther advantage is that it is capable of netralizing the effect of exchangable Al, thus improving the soluble P in the soil. The improvement in soil physic due to the application of ilter press mud is expected to increase the crop yield The purpose of this experiment was to ind out the appropriate dose of iller press mud and rock phosphate on roselle cultivation in the red yellow podsolic soil in South Kalimantan The experiment was conducted in the central growing areas in red yellow podsolic soil al the Sabuhur II transmigration silc, Jorong Sub District, Tanah I-aut District, South Kalimantan Province from September 1998 to April 1999 Location attitude was 50 m above sea level and climate type was B2 with 7-9 wet months and less 2-3 dry months. The topography was low land with rain fed land The experiment was arranged factorially in a randomized block design with three replications. The irst factor was filter press mud with a rate of 3; 4 and 5 Ions per hectare While the second factor was rock phosphate with the rate of 40; 60; 80, and 100 kg P;0> per hectare. The treatments were 12 ertilizer combination of filler press mud Plating space was 20 cm x 20 cm and Ihe plot size was 4 m x 6 m with one plant per hole 'Die result showed that 5 tons filter press mud * 40 kg P2Oj rock phosphate per hectare and added with 90 kg N ^ 60 kg K2O gave the best performance The plant height, stem diameter, fresh weight, bark weight, iber yield and iber strength were 336.35 cm; 14.73 mm; 536 kg/plot; 147.50 kg/plot; 2 775 tons per hectare and 31.50 gram/tex respectivelly.Key words : Roselle, ilter press mud, rock phosphate, red yellow podsolic, Kalimantan
PENGARUH ROTASI KENAF TERHADAP PRODUKSI PADI DAN JAGUNG SANTOSO, BUDI; SASTROSUPADI, ADJI
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.91-97

Abstract

Tingkat kesuburan tanah dapat diperbaiki melalui pemberian bahan organik, hijauan tanaman ke dalam tanah atau diadakan rotasi tanaman. Kenaf merupakan tanaman semusim berumur 120 hari yang sesuai dirolasi dengan padi dan jagung. Penelitian rotasi kenaf dengan padi dan jagung dilaksanakan di Desa Canggu, Kecamatan Pare, Kabupaten Kediri pada musim tanam 1992/1993 sampai dengan 1994/1995 pada tanah regosol cokelat keabuan Tinggi tempat 70 meter di atas permukaan air laut dengan tipe iklim C3 menurut sistem klasiikasi Oldeman Tujuan penelitian untuk mengetahui pengaruh rotasi tanaman kenaf dengan tanaman padi dan jagung terhadap peningkatan hasil padi dan jagung setelah lanaman kenaf seta perubahan ciri-ciri tanah tetentu sepeti kandungan C, N dan KTK di lahan irigasi Perlakuan disusun dalam rancangan acak kelompok yang diulang sebanyak tiga kali. Seluruh perlakuan ada 12 macam rotasi. Ukuran petak 14 m x 10 m. Padi yang ditanam varietas IR-64, jagung varietas CPI dan kenaf He. G4. Jarak tanam padi, jagung dan kenaf beturut-turut 20 cm x 20 cm; 75 cm x 30 cm dan 20 cm x 15 cm Hasil penelitian menunjukkan bahwa frekuensi penanaman kenaf dapat meningkatkan kesuburan tanah yang meliputi C-organik. N-total dan KTK tanah, baik pada tahun petama maupun pada tahun petama dan kedua. Hasil padi pada tahun petama tanpa kenaf, satu dan dua kali tanam kenaf sebelum padi masing-masing sebesar 5.19, 5.25, dan 6.24 ton/ha. Pada tahun petama dan kedua tanpa tanam kenaf dua dan liga kali tanam kenaf sebelum padi, masing-masing sebesar 4 68, 4.98, dan 5.23 ton/ha. Hasil jagung pada tahun petama tanpa kenaf dan satu kali tanam kenaf sebelum jagung, masing-masing sebesar 3.70 dan 4 47 ton/ha.Kata kunci: Kenaf, rotasi tanaman, padi, jagung, irigasi, kesuburan tanah ABSTRACTEffect of kenaf rotation on paddy and corn yieldThe fetility status of soil could be improved through the application of organic matter, fresh green plant or crop rotation practices. An experiment on kenaf-paddy-com rotalion was conducted ai Canggu Village, Pare Sub District, Kediri District from 1992/1993 to 1994/1995 on grey brown regosol. The altitude was 70 m above sea level, and the climate type was C3 according to Oldeman classiication. The purpose of the study was to know the effect of kenaf rotation on paddy and com yields and some soil characteristic change ater kenaf planting in irrigalcd land. The cxperimenl was arranged in a randomized block design with three replications. All treatments consisted of 12 kinds of rotations. Plot size was 14 m x 10 m. The variety of paddy, com, and kenaf used in this experiment were IR-64, CPI and He G4 respectively. The plant spacing were 20 cm x 20 cm; 75 cm x 30 cm and 20 cm x 15 cm respectively. The result indicated that the frequency of growing kenaf enhanced C- organic, Total-N and CEC status. Paddy yield in the irst year of growing none, once and two times of kenaf before paddy obtained 5.19; 5.25 and 6.24 ton/ha respectively. Paddy yield in the irst and second year of growing none, two and three times of kenaf before paddy obtained 4.68; 4.98 and 5.23 ton/ha respectively. Corn yield in the irst year of none and once of kenaf before com obtained 3.70 and 4.47 ton/ha respectively.Key words : Kenaf, plant rotation, paddy, com, irrigation, soil fetility
STUDI POPULASI OPTIMAL PADA TEMBAKAU MADURA DENGAN CARA PANEN SATU KALI ABDUL RACHMAN; . SUWARSO
Jurnal Penelitian Tanaman Industri Vol 9, No 3 (2003): September, 2003
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jlittri.v9n3.2003.98-103

Abstract

Percobaan dilakukan di dua tempat dengan perbedaan tipe lahan di Kabupaten Sumencp, P. Madura, unluk mempclajari pengaruh populasi tanam terhadap sifat agronomis dan kimia dari dua varietas tembakau madura Percobaan dilakukan pada tahun 1990 (Mei s/d September), dengan cara panen salu kali, di Desa Guluk-guluk mewakili lahan gunung dengan clevasi 235 m, dan di Desa Kambingan Barat mewakili lahan legal (lahan kering) dengan clevasi 15 m. Sifat tanah dari lahan gunung adalah betcksiur liat, dengan 55% liat, 29% debu, 16% pasir, 0 62% C-organik, 0.11% N, dan pi I 7.5; dan di lahan tcgal adalah betckstur lempung berliat, dengan 34% liat 38% debu, 28% pasir, 0.55% C-organik, 0.09% N, dan pH 6.9. Perlakuan terdiri atas dua variclas tembakau madura (Prancak dan Berbedih) dan tiga taraf populasi tanaman (25 000, 33 000, dan 41 000 tanaman per ha). Perlakuan disusun dalam rancangan acak kelompok faktorial, dengan empat ulangan. Hasil percobaan menunjukkan bahwa pada lahan gunung variclas Prancak memberikan hasil krosok dan kadar Cl daun yang lebih tinggi dan pada varietas Berbedih. telapi variclas Berbedih memberikan jumlah daun dan kadar nikotin yang lebih tinggi dari pada varietas Prancak. Sifat lain dari kedua varietas tersebut adalah sama. Peningkatan populasi tanam meningkatkan hasil daun rajangan dan krosok. telapi menurunkan ukuran lebar daun Sebagian besar sifat-sifat tembakau tidak terpengaruh oleh kenaikan populasi. Populasi tanam yang sesuai untuk lahan gunung adalah 41 000 tanaman/ha, atau dengan jarak tanam (90 cm x 45 cm)/2 x 45 cm. Pada lahan legal varietas Prancak memberikan hasil krosok yang lebih linggi dari pada varietas Berbedih, tetapi varietas Prancak lebih rendah dalam hal jumlah daun, kadar nikotin dan gula dari pada varietas Berbedih Sifal yang lainnya dari kedua varietas tersebut adalah sama. Peningkatan populasi lanam di lahan legal meningkatkan ukuran tinggi tanaman dan hasil krosok Sebagian besar sifat tembakau tidak terpengaruh oleh peningkatan populasi. Populasi yang sesuai untuk lahan tcgal adalah 33 000 tanaman/ha, atau dengan jarak lanam (90 cm x 45 cm)/2 x 40 cm.Kata kunci: Nicotiana tabacum, tembakau madura, populasi lanam, varietas, tipe lahan ABSTRACT Study on optimal plant population of madura tobacco in one harvesting methodThe experiment was conducted in two locations with different type of land, in Sumenep Regency, Madura Island, to study the effect of plant populations on agronomic and chemical characteristics of two madura tobacco varieties. This experiment was conducted in 1990 (May to September) on madura tobacco in one harvesting method, in Guluk-guluk Village represented hilly land lypc at the elevation of 235 m, and in Kambingan Barat Village represented upland type at the elevation of 15 m The soil characteristics of hilly land is clay texture with 55% clay, 29% silt, 28% sand, 0.62% organic-C. 0.11% N, and pll 7.5; and the soil characteristics of upland is clay loam texture with 34% clay, 38% silt, 28% sand, 0.55% organic-C, 0.06% N, and pH 6.9. The treatment consislcd of two varieties of madura tobacco (Prancak and Berbedih) and three plant population rates (25 000, 33 000 and 41 000 plants/ha). The treatments were arranged in factorial randomized block design with four replications. The result showed that in hilly land, Prancak gave more dry leaf yield and leaf Cl content than thai of Berbedih, but Prancak gave less leaf number and leaf nicotine content than Berbedih Other characters of the two varieties were similar. Increasing plant population increased cut and dry leaf yield, but decreased leaf width. Most of tobacco characters were not affected by increasing plant population. Appropriate plant population for hilly land tobacco was 41 000 plants/ha or with plant spacing of (90 cm x 45 cm)/2 x 40 cm. In upland, Prancak gave more dry leaf yield more lhan Berbedih, but Prancak gave less leaf number, nicotine and sugar content than Berbedih. Other characters of the two varieties was similar. Increasing plant population increased plant height and dry leaf yield. Most of tobacco characters were not affected by increasing plant population. Appropriate plant population for upland tobacco was 33 000 plants/ha or with plant spacing of (90 cm x 45 cm)/2 x 45 cm.Key words : Nicotiana tabacum, madura tobacco, plant population, variety, land type

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