scholarly journals PENGARUH UKURAN DAN PERLAKUAN BIBIT TERHADAP PERTUMBUHAN DAN PRODUKSI ILES-ILES

2020 ◽  
Vol 8 (2) ◽  
pp. 61
Author(s):  
. HOBIR
Keyword(s):  
Plant Height ◽  
Seed Size ◽  
Seed Treatment ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Leaf Length ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Sprouted Seeds ◽  
Plant Stand

<p>Pengaruh ukuran dan perlakuan bibit terhadap petumbuhan dan produksi umbi iles-ilcs (Amorphophallus oncophyllus) ditcliti di Bogor dan Cikampek tahun 1993 1995, yang dilakukan dalam dua percobaan. Pada percobaan petama dipelajai pengaruh ukuran bibit utuh dan pada percobaan kedua pengaruh ukuran dan pcmbclahan bibit terhadap petumbuhan dan produksi umbi. Bibit utuh berasal dari umbi batang dengan ukuran 200 dan lOOg, seta umbi tetas dengan 5 dan 2.5g, sedangkan pcmbclahan bibit berasal dai umbi batang ukuran 200g, yang dibelah menjadi 2 bagian (a lOOg), 4 bagian (a SOg) dan 8 bagian (a 25g). Bibit dai pcrlakuan-perlakuan tersebut disemai di bak pasir di rumah kaca dan petumbuhannya diamati pada umur 1-2 bulan. Bibit yang bctunas normal ditanam di lapangan. Untuk percobaan percobaan petama (bibit utuh), bibit-bibit yang bctunas normal di tanam di Bogor dan Cikampek, sedang percobaan kedua (bibit dibelah) ditanam hanya di Bogor. Kedua percobaan tersebut dirancang secara acak kelompok dengan 5 ulangan. Parameter yang digunakan untuk menilai pengaruh perlakuan adalah tinggi tanaman dan diameter batang, panjang daun dan produksi umbi pada umur 6 dan 18 bulan setelah tanam, untuk bibit utuh dan 6 bulan untuk bibit yang dibelah. Hasil penelitian dapat disimpulkan sebagai berikut. Dai percobaan pertama (bibit utuh) temyata ukuran bibit tidak berpengaruh terhadap persentase pertunasan maupun petumbuhan di lapang. Komponen pertumbuhan dan hasil umbi sangat dipengaruhi oleh lokasi penanaman dan ukuran bibit. Komponen pertumbuhan, kecuali diameter batang, seta produksi umbi di Bogor nyata lebih tinggi dari pada di Cikampek. Pada bibit utuh, ukuran bibit 200g menghasilkan komponen petumbuhan dan produksi umbi paling tinggi dan berbeda dengan ukuran- ukuran lainnya, makin kecil ukuran bibit makin kecil nilai komponen petumbuhan dan produksi umbi. Dai percobaan kedua (pembelahan umbi) diperoleh bahwa pembelahan umbi dai 200g sampai 25g tidak mempengaruhi pertunasan di rumah kaca maupun tanaman yang tumbuh di lapangan. Tinggi batang lebih kecil pada bclahan 25g, diameter batang pada belahan 50g dan produksi umbi pada bclahan lOOg dibanding bibit utuh 200g. Berdasarkan data tersebut, untuk memproduksi bibit secara masal, umbi dapat dibelah sampai ukuran 25g dan dalam waktu 6 bulan dapat diperoleh umbi sebcrat + 200g dan umbi ini dapat menghasilkan umbi sekitar 1 kg umbi/batang dalam waktu 6 bulan.</p><p>Kata kunci: Amorphophallus oncophyllus. ukuran bibit, produksi</p><p> </p><p><strong>ABSTRACT</strong></p><p><strong>Effect of seed size and seed treatment on the growth and yield of Amorphophallus oncophyllus</strong></p><p>Efect of seed size and seed treatment on the growth and yield of Amorphophallus oncophyllus was studied in Bogor and Cikampek from 1993 to 1995, in two expeiments. The irst experiment studied the efect of the size of sound seed, and the second studied the efect of size and splitting seed on die growth and yield of tuber. In the first experiment the sound seed used were the true tuber with the size of 200 and lOOg and bulbil with the size of 5 and 2.5g. In the second expeiment, the tuber of 200g were splined into 2 parts (a lOOg), 4 parts (a 50g) and 8 parts (a 25g). The seeds were irstly planted in sand boxes in die glass house and evaluated for their sprouting at I -2 month ater planting. For the irst expeiment the normal sprouted seeds were planted in the ield in Bogor and Cikampek, while for the second expeiment, the normal sprouted seeds were planted in Bogor The two experiments were designed as a randomized block in 5 replicates. The parameters used for evaluating the effect of treatments were plant height, stem (pseudo-stem) diameter, leaf length and yield of tuber at 6 and 18 months ater planting for the irst and 6 months for the second expeiment. Results of the studies are summarized as follows. From the irst expeiment (sound seed) it was sevealed that seed size neither afected spronting percentage nor plant stand in the ield. The growth components and tuber yield were afected by planting location and size of seed. The growth components, except stem diameter, and tuber yield in Bogor significantly higher than those in Cikampek. From the second experiment it was shown that splitting seed rom 100 to 25g neither afected the sprouting percentage in the glass house nor plant stand in the ield. Plant height signiicantly decreased at the size of 25g, stem diameter al 50g and tuber yield at lOOg. Based on the data, for mass production of seed tuber, the tuber could be splined into 25g. Within 6 months the seed may produced a tuber of 300g and the tuber could produced 1 kg tuber within 6 months.</p><p>Key words : Amorphophallus oncophyllus. seed size, tuber yield</p>

scholarly journals Morphological and Anatomical Changes by Cochicine in Seedling of Impatiens balsamina L.

2019 ◽  
Vol 3 (2) ◽  
pp. 33
Author(s):  
Ni Made Sastriyani Wiendra ◽  
Made Pharmawati
Keyword(s):  
Plant Height ◽  
Genetic Modification ◽  
Leaf Length ◽  
Stem Diameter ◽  
Anatomical Changes ◽  
Impatiens Balsamina ◽  
Sprouted Seeds ◽  
Soil Media ◽  
Plant Stem ◽  
Stomatal Number

Impatiens balsamina L. is a plant that is widely cultivated in Bali. The flower of this plant is used as a component of offering in Hindu religious ceremonies. The flower petals are thin and wilt easily, therefore genetic modification is needed to get better quality. This research aimed to study the effect of 0.01% colchicine with soaking periods of 4 hours, 8 hours, 12 hours and 24 hours to seedlings of I. balsamina. Seeds of I. balsamina were germinated and sprouted seeds were treated with 0.01% colchicine for 4 hours, 8 hours, 12 hours and 24 hours. The sprouted seeds were then transfer to polybag with soil media. The experiment was designed with randomized blok design with five replicates. Observations were done on plant height, length and width of leaf, stem diameter, number of stomata as well as observation on plant stem cortex cells. Results showed that colchicine reduced plant height at three weeks after planting, while plant stem diameter increased. Control plants had the smallest leaf length and width. The number of stomata decreased at plants derived from colchicine treated sprouted seeds and the lowest stomatal number observed was at soaking duration of 24 hours.

scholarly journals EFFECTS OF DIFFERENT RATES OF ORGANIC AND INORGANINC FERTILIZER ON GROWTH AND YIELD COMPONENTS OF POTATO (SOLANUM TUBEROSUM L.) IN JIMMA ARE, SOUTH WEST ETHIOPIA

2016 ◽  
Vol 4 (11) ◽  
pp. 115-121
Author(s):  
Amana Mama ◽  
Jemal Jeylan ◽  
AbebeWoldesenbet Aseffa
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Yield Components ◽  
Farmyard Manure ◽  
Leaf Length ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Leaf Number ◽  
Stem Number ◽  
Potato Leaf

The experiment was conducted under field condition at Jimma University College of Agricultures and Veterinary Medicine (JUCAVM) to determine the Effects of Different Rate of Organic and Inorganic Fertilizer on Growth and yield Components of Potato (Solanum tuberosumL).The experiment design used was randomized complete block design(RCBD). The experimental treatments were replicated three times. A Potato cultivar ‘Jalene’ was grown combined with Farmyard manure and nitrogen (F0N0), (F20N70), (F0N35),(F0N70), (F20N35), (F20N0) as a treatment.. Data were recorded on Potato leaf area, plant height, leaf length, leaf number, leaf diameter, stem diameter and stem number. The result revealed that the combination of various level of Farmyard manure and nitrogen statistically (p≤0.05) affected leaf area, plant height, leaf length, leaf number, leaf diameter, stem diameter and stem number. The maximum values for leaf area, plant height, leaf length, leaf number, leaf diameter, stem diameter and stem number were recorded from (F0N70, F20N70, F0N70, F20N35, F20N0, F20N70, F20N0) respectively .However The minimum values of all the parameters were recorded from the control treatment (F0 N0). From the study it could be concluded that Potato yield components were greatly affected by different rates of organic and inorganic fertilizers. The appropriate amount of different rates of fertilizers (farmyard manure and nitrogen) should be used to increase Potato growth and yield.

scholarly journals Growth and production of irrigated vitória pineapple grown in semi-arid conditions

2014 ◽  
Vol 36 (3) ◽  
pp. 693-703 ◽  
Author(s):  
Rodinei Facco Pegoraro ◽  
Bruna Aparecida Madureira de Souza ◽  
Victor Martins Maia ◽  
Uirá do Amaral ◽  
Marlon Cristian Toledo Pereira
Keyword(s):  
Plant Height ◽  
Biomass Production ◽  
Plant Traits ◽  
Block Design ◽  
Leaf Length ◽  
Stem Diameter ◽  
Plant Residue ◽  
Arid Conditions ◽  
Vegetative Biomass ◽  
Semi Arid

This study aimed to evaluate the growth characteristics of irrigated Vitória pineapple plants grown in semi-arid conditions and determine its developmental stages based on those characteristics. It was used a randomized block design with four replicates. The experimental treatments were: plant harvest at 270, 330, 390, 450, 510, 570, 690, 750, and 810 days after planting (DAP). The following variables were determined: plant height, stem diameter, D-leaf length, D-leaf fresh and dry mass, biomass production of plants and plant parts (organs), and vegetative biomass. Five phenological stages are proposed based on vegetative biomass production: < 20% biomass production (V1); 21-40% (V2); 41-60% (V3); 61-80% (V4); and > 80% (V5). The maximum growth rate for plant height, D-leaf length, and stem diameter was observed at the end of the phenological stage V1 (390-411 DAP), and at the end of stage V5 these plant traits had average values of 106, 82, and 7 cm, respectively. The maximum biomass accumulation rates were observed at stages V4 and V5, resulting in a final fruit yield and total fresh biomass of 72 t ha-1 and 326 t ha-1, respectively. Finally, we estimated that 80% of the accumulated biomass may remain in the field after fruit and slip harvest, and could be incorporated as plant residue into the soil.

scholarly journals Response of growth and yield of two soybean varieties to seed pre-treatment applications

2021 ◽  
Vol 883 (1) ◽  
pp. 012052
Author(s):  
N Herawati ◽  
A R Aisah ◽  
I Mardian ◽  
B N Hidayah ◽  
B T R Erawati
Keyword(s):  
Plant Height ◽  
Seed Treatment ◽  
Seed Quality ◽  
Block Design ◽  
Growth And Yield ◽  
Agronomic Crops ◽  
Randomized Block Design ◽  
Two Factors ◽  
Pre Treatment ◽  
Four Levels

Abstract Plant growth is influenced by seed quality. Seeds need to be treated to prevent pest and disease disorders or to increase seed germination. Soybean planting was carried out in this study by the treatment of varieties and seed pre-treatment application before planting. The study aimed to measure the growth and yield of soybeans by varieties and seed treatment before planting, carried out in the Village of Nggembe, District of Bolo, Bima Regency. The study used factorial randomized block design with two factors. The first factor was soybean varieties consisting of two levels, namely Devon and Dena varieties, and the second factor was the application of pre-planting seed treatments consisting of four levels namely Cruiser, Marshall, Agrisoy, and without seed treatment, each treatment was repeated three times. Observations were made on the performance of agronomic crops and soybean yields. The results showed that the treatment of soybean varieties and the application of seed treatment had a significant influence on plant height and soybean productivity, and both treatments had interactions on parameters of plant height, number of filled pods, weight of 100 seeds, and soybean productivity with the best results successively produced by a combination of Devon-Control, Devon-Marshall, Devon-Agrisoy, and Dena-Cruiser.

scholarly journals Effect of Nitrogen and Boron Application on Carica papaya L. I. Growth and Yield

1969 ◽  
Vol 67 (3) ◽  
pp. 181-187
Author(s):  
Agripino Pérez-López ◽  
Rubén D. Reyes-Jurado
Keyword(s):  
Plant Height ◽  
Carica Papaya ◽  
Marked Effect ◽  
Fertilization Rate ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Stem Height ◽  
Four Levels

The experiment was carried on a Coto clay (an Oxisol). The effect of four levels of N (0, 57, 170 and 340 kg/ha) and four levels of B (0, 2.3, 4.5, 6.8 kg/ha) were determined using the P.R. 7-65 papaya variety. Treatments were initiated when the transplanted seedlings were three months old, and were repeated every six weeks. The information recorded showed the following results: Increments of N and B levels did not show a marked effect on plant height and stem diameter. Boron tended to be more effective than N in increasing stem height and diameter. The petiole fresh and dry weights increased linearly as the N and B levels were raised. The number and weight of fruits borne on female and hermaphroditic trees increased linearly as the N and 8 levels were raised. The results of the experiment showed that the papaya plant requires a high N and B fertilization rate.

scholarly journals Pengaruh Jenis Mikoriza Terhadap Pertumbuhan Beberapa Varietas Cabai (Capsicum annum L.) pada Tanah Incepticol Krueng Raya Aceh Besar

2020 ◽  
Vol 4 (1) ◽  
pp. 108-117
Author(s):  
Rahmat Fitra Yandi Nasution ◽  
Syamsuddin Syamsuddin ◽  
Syafruddin Syafruddin
Keyword(s):  
Plant Height ◽  
Glomus Mosseae ◽  
Block Design ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Branch Number ◽  
Capsicum Annum ◽  
Randomized Block Design ◽  
Experimental Garden ◽  
Banda Aceh

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh jenis mikoriza, varietas dan interaksi jenis mikoriza dan varietas terhadap pertumbuhan dan hasil tanaman cabai pada tanah Incepticol. Penelitian ini dilaksanakan di Kebun Percobaan Iesuum Krueng Raya Aceh Besar, Rumah Kaca dan Laboratorium Fisiologi Tumbuhan Fakultas Pertanian Universitas Syiah Kuala Darussalam Banda Aceh dari bulan Mei sampai September 2018. Analisis data yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) pola faktorial 3 x 2 dengan 3 ulangan. Faktor yang diamati dalam penelitian ini adalah jenis mikoriza dan varietas. Jenis mikoriza yang digunakan adalah Glomus mosseae, Gigaspora sp dan Campuran serta varietas yang digunakan adalah varietas Lado F1 dan Perintis. Hasil penelitian ini menunjukan jenis mikoriza berpengaruh nyata pada tinggi tanaman 30 dan 45 HSTdan jumlah cabang produktif. Jenis mikoriza terbaik terdapat pada jenis mikoriza campuran (Glomus mosseae dan Gigaspora sp). Pada varietas berpengaruh sangat nyata terhadap tinggi tanaman 15,30 dan 45 HST, diameter batang 30 dan 40 HST dan jumlah cabang produktif serta berpengaruh nyata pada diameter batang 45 HST. Jenis varietas terbaik terdapat pada varietas Lado. Interaksi antara jenis mikoriza dan jenis varietas berpengaruh sangat nyata terhadap tinggi tanaman 30 HST dan jumlah cabang produktif serta berpengaruh nyata pada diameter batang 30 HST.Interaksi antara jenis mikoriza dan varietas terbaik tedapat pada jenis mikoriza campuran (Glomus mosseae dan Gigaspora sp) dengan varietas Lado F1.The Effect of Mycorrhizal Types on the Growth of Some Chili Varieties in Incepticol Soil Krueng Raya Aceh BesarAbstract. This research aims to determine the effect of type of mycorrhiza, varieties, and interactions of mycorrhiza and varieties types on the growth and yield of chili plants on the Inceptisol land. This research was carried out at the Krueng Raya Iesuum Experimental Garden in Aceh Besar, greenhouse and laboratory of plant physiology, Faculty of Agriculture of Syiah Kuala University, Darussalam, Banda Aceh from Mei to September 2018. The analysis of data used in this study was Randomized Block Design -Factorial 3x2 with 3 replications. The factors observed in this research were the type of mycorrhiza and varieties. Types of mycorrhiza used are Glomus mosseae, Gigaspora, and the combination. Varieties used are Lado F1 and Perintis. The result of this research showed that types of mycorrhiza take effect significantly on plant height 30 dan 45 DAP and productive branch numbers. The mixed of mycorrhiza gives the best result on growth and yield of chili plant. The varieties of chili plants highly significant take effect on plant height 15, 30 and 45 DAP, stem diameter 30 and 40 HST and productive branch numbers and significantly affect on stem diameter 45 DAP. Lado F1 gives the best result on growth and yield. The interactions of mycorrhiza and varieties type highly significant take effect on plant height 30 HST and productive branch number and significantly take effect on stem diameter 30 HST. The combination of mixed mycorrhiza and Lado F1 treatment gives the best result on growth and yield of chili plants. 

scholarly journals Line×tester analysis in lilium×formolongi: identification of superior parents for growth and flowering traits

2019 ◽  
Vol 17 (1) ◽  
pp. 175-187
Author(s):  
R Rai ◽  
J Shrestha ◽  
JH Kim
Keyword(s):  
Plant Height ◽  
Gene Action ◽  
Block Design ◽  
Leaf Length ◽  
Stem Diameter ◽  
Leaf Width ◽  
Days To Flowering ◽  
Flower Diameter ◽  
Number Of Leaves ◽  
Almost All

An experiment was carried out using eight double cross F1s (DCF1s) as lines and two testers to obtain sixteen Line ×Tester hybrids for the evaluation of major growth and flowering traits thereby to understand the breeding potentiality of the parental lines. The performance of growth and flowering traits of all twenty-six genotypes were evaluated in a randomized complete block design (RCBD) with three replications. The analysis of variance (ANOVA) showed all the genotypes were significantly different for all agro-morphological traits under study. The estimated general combining ability (GCA) effects showed that parent 5(P5), were superior for plant height, stem diameter, number of leaves, leaf length, days to flowering and attitude of floral axis followed by parent 2(P2) for leaf length, leaf width, days to flowering and attitude of floral axis and parent7 (P7) for number of flower, flower diameter, bud length and attitude for floral axis. Likewise; tester 1 found to be best combiner with significant GCA effect for almost all growth and flowering traits (except number of leaves). The plant height, leaf width, number of flower and attitude of floral axis showed prevailing additive gene action while stem diameter, number of leaves, leaf length, days to flowering, flower diameter and bud length indicated predominance of dominance gene action. We can conclude that parent P5, parent P2 and parent P7 can be used as good mother lines and the tester 1, as good donor for the seed production. SAARC J. Agri., 17(1): 175-187 (2019)

scholarly journals Effect of Nutrient Management on Growth and Yield of Cauliflower Hybrids in haor area

2020 ◽  
Vol 22 (1) ◽  
pp. 95-104
Author(s):  
M Salwa ◽  
MA Kashem
Keyword(s):  
Plant Height ◽  
Nutrient Management ◽  
Block Design ◽  
Leaf Length ◽  
Growth And Yield ◽  
Recommended Dose ◽  
Cow Dung ◽  
Fertilizer Rate ◽  
Yield Data ◽  
Randomized Complete Block Design

The experiment was conducted in the Dekarhaor of Noagaon village under South Sunamganj Upazila of Sunamganj district during November 2017 to February 2018 to observe the effect of nutrients management on growth and yield of cauliflower hybrids. Two Hybrids namely ShiraGiku (V1) and Rupali (V2), and four combinations of nutrients, viz. (i) recommended rate of N-P-K-S-Zn-B @ 180-80-180-28-4.5-2.1 kg ha-1(F1), (ii) F1 + 25% N-P-K- S-Zn-B of F1 (F2), (iii) F1 – 25% N-P-K-S-Zn-B of F1 (F3), and (iv)  cow dung @ 10 t ha-1 (F4)  was conducted in a factorial randomized complete block design (RCBD) and replicated thrice. Plant height (cm), numbers of leaves plant-1, leaf length (cm) and leaf breadth (cm), and spreading diameter (cm) were collected at 15 days intervals, while the yield data were recorded at harvest. The parameters were significantly varied due to hybrids and fertilizers packages. Higher gross yield (42.52tha-1) was found in Shira Giku and lower (42.12 t ha-1) from Rupali. Higher curd yield of 25.17 t ha-1 was obtained in Shira Giku than Rupali (9.61 t ha-1). The highest gross yield of 44.45 t ha-1 was obtained when the crop was treated with cowdung @ 10 t ha-1 followed by recommended fertilizer rate (F1). The curd yield of 18.19 t ha-1 was obtained with 25% less than recommended fertilizer rate of application (F3). The highest gross yield of 52.93 t ha-1 was obtained in V1F1 combination and the lowest of 30.10t ha-1in V2 F1. Results revealed that the Hybrid ShiraGiku with recommended dose of fertilizer (180-80-180-28-4.5-2.1 kg ha-1N-P-K-S-Zn-B) performed the best in comparison to other treatment combinations. Bangladesh Agron. J. 2019, 22(1): 95-104

Growth and yield response of Broccoli to vermicompost and farmyard manure

2020 ◽  
Vol 25 (2) ◽  
pp. 2107-2113
Author(s):  
H. E. Rabbee ◽  
N. J. Methela ◽  
B. Hossain ◽  
M. R. I. Suhel
Keyword(s):  
Plant Height ◽  
Agricultural Research ◽  
Block Design ◽  
Farmyard Manure ◽  
Leaf Length ◽  
Research Field ◽  
Growth And Yield ◽  
Yield Response ◽  
Treated Plant ◽  
Number Of Leaves

The present experiment was carried out at Agricultural Research field, Noakahali Science and Technology University, Noakhali, Bangladesh during the period from September 2018 to February 2019 to find out the effects of Vermicompost and Farmyard manure growth and yield of Broccoli. The single factor experiment was carried out by Randomized Complete Block Design (RCBD) with three replications. Three treatments viz., T0= Control, T1= Vermicompost and T2= Farm Yard Manure as well as Centeuro variety were used. Data were recorded from different stages of plant growth on plant height at different days after transplanting, number of leaves/plant, leaf length, leaf diameter, plant spread, 50% curd initiation days, 50% curd maturation days, curd diameter, Marketable curd weight, Net curd weight and Yield/plot. All the recorded parameters were statistically significant among the treatments. The tallest plant (43.67cm) can be recorded from T1 (vermicompost) whereas lower plant height (38.10cm) was notified from control (T0). The maximum number of leaves (16.03) recorded from vermicompost treated plant where minimum from control (T0; 13.28). Highest leaf length (40.67cm), leaf diameter (16.22cm), plant spread (47.91cmü), early curd initiation (73.22 days), early curd maturation (89.72 days), curd diameter (16.16cm), marketable curd weight (452.67g), net curd weight (361.43g) and yield/plot (3.94kg) was found from vermicompost treated plant is compared with Farmyard manure whereas lowest data recorded from control. Observing the results it can be stated that using of vermicompost treated plants gave better growth and yield contributing characters of Broccoli in contemporary with other treatments.

scholarly journals Pengaruh konsentrasi zpt giberalin dan lama penyinaran terhadap pertumbuhan dan hasil tanaman krisan (Chrysanthemum morifolium)

2019 ◽  
Vol 3 (1) ◽  
pp. 84
Author(s):  
Dian Rifalasna ◽  
Sumarsono Sumarsono ◽  
Budi Adi Kristanto
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Irradiation Time ◽  
Chrysanthemum Morifolium ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Cut Flowers ◽  
Central Java ◽  
Flower Diameter ◽  
Number Of Leaves

ABSTRACT               This study aims to examine the effect of giberalin ZPT concentration and duration of irradiation on the growth and yield of chrysanthemum (Chrysanthemum morifolium) cut flowers. The study took place in February - June 2018. The study was conducted in Mendongan Village, Sumowono District, Semarang Regency, Central Java.  ABSTRACT  This study aimed to examine the effect of giberalin concentration and duration of irradiation on the growth and yield of chrysanthemum (Chrysanthemum morifolium) cut flowers. The study took place in February - June 2018. The study was conducted in Mendongan Village, Sumowono District, Semarang Regency, Central Java. The design used in the study was a Completely Randomized Factorial 4x4 Design. The first factor was gibberallin treatment consisted of G1: GA 0 ppm, G2: GA 10 ppm, G3: GA 20 ppm, G4: GA 30 ppm. The second factor was the irradiation time consisted of R1: 1 hour irradiation time, R2: 2 hours irradiation time, R3: 3 hours irradiation time, and R4: 4 hours irradiation time. Parameters observed were plant height, stem diameter, number of leaves, leaf area, number of flowers, flower diameter, flowering age and flower harvesting age.The results showed that the treatment of giberalin concentration significantly affected the parameters of the amount of interest. While the irradiation treatment time significantly affected the parameters of plant height, number of leaves, flower diameter, stem diameter, age of flowering, and leaf area. Keywords: Giberalin, Chrysanthemum, Irradiation Period ABSTRAK  Penelitian ini bertujuan untuk mengkaji pengaruh konsentrasi ZPT giberalin dan lama penyinaran terhadap pertumbuhan dan hasil bunga potong tanaman krisan (Chrysanthemum morifolium). Penelitian berlangsung pada bulan Februari - Juni 2018. Penelitian dilakukan di Desa Mendongan, Kecamatan Sumowono, Kabupaten Semarang, Jawa Tengah. Rancangan yang digunakan dalam penelitian adalah Percobaan Faktorial 4x4 Rancangan Acak Lengkap (RAL). Faktor pertama yaitu perlakuan giberalin sebanyak 4 taraf yaitu G1 : GA 0 ppm, G2 : GA 10 ppm, G3 : GA 20 ppm, G4 : GA 30 ppm. Faktor kedua adalah lama penyinaran dengan 4 taraf yaitu R1 : lama penyinaran 1 jam, R2 : lama penyinaran 2 jam, R3 : lama penyinaran 3 jam, dan R4 : lama penyinaran 4 jam. Parameter yang diamati adalah tinggi tanaman, diameter batang, jumlah daun, luas daun, jumlah bunga, diameter bunga, umur berbunga dan umur panen bunga. Hasil penelitian menunjukkan bahwa konsentrasi giberalin berpengaruh nyata terhadap peningkatan jumlah bunga yang bertambah banyak. Sedangkan lama penyinaran berpengaruh nyata terhadap peningkatan tinggi tanaman, jumlah daun, diameter bunga, diameter batang, umur berbunga, dan luas daun. Kata Kunci :Giberalin, Krisan, Lama Penyinaran

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