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Central Agricultural University, Pasighat

The Central Agricultural University has been established by an act of Parliament, the Central Agricultural University Act, 1992 (No.40 of 1992). The Act came into effect on 26th January, 1993 with the issue of notification by the Department of Agricultural Research and Education (DARE), Govt. of India. The University became functional with the joining of first Vice-Chancellor on 13th September, 1993. The jurisdiction of the University extends to six North-Eastern Hill States viz., Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Sikkim and Tripura, with headquarters at Imphal in Manipur. College of Horticulture & Forestry, a constituent College of the Central Agricultural University, Imphal, Manipur, was established on 7th March 2001 at Pasighat, Arunachal Pradesh on the bank of beautiful river Siang.

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2021 - 20234
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Subject: Floriculture and Landscaping ×
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Now showing 1 - 4 of 4
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    ThesisItemOpen Access
    Residual Effect of Organic and Inorganic Inputs on Growth and Yield of Gladiolus under Marigold- Gladiolus Cropping System
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102 Central Agricultural University (Imphal), 2023-02-06) Manigandan, E; Kumar, Sunil; Mailappa, A. S.
    Significant responses of residual nutrients on flowering characters of gladiolus were observed. Treatment combinations of T12 was showed earliness in spike initiation (59.40 days). However, enhanced rachis length (55.28 cm) and spike length (92.98 cm) were noticed in treatment combinations of T12 followed by treatment T3, [48.75 cm and 82.20 cm]. Maximum number of florets/spike (17.07) were obtained with T12 followed by T11, whereas, enhanced spike yield (49,390 spikes/ha) was obtained from treatment combinations of T12 followed by T3, [32,696 spikes]. Significant corms characteristics viz. maximum number of corms/plant (2.80), polar diameter of corms (3.37cm) were associated with T12 followed by T6 (222 kg/ha), [2.07, 2.64 cm]. Maximum equatorial diameter of corms (5.48 cm) were obtained with T12 followed by T4 [4.82 cm]. Moreover, the enhanced number of contractile roots (9.30) were obtained with the T12 followed by T11 (222 kg/ha) [7.67]. Nevertheless, T7 (222 kg/ha) produced the maximum number of filiform roots (20.67). Residual effect of organic and inorganic inputs significantly influenced the nutrient uptake in leaves, flowers, spikes and roots. The treatment combination T12 enhanced nitrogen uptake in leaves, flowers, spikes , roots (3.45 kg/ha, 2.11kg/ha, 5.40 kg/ha, 0.44 kg/ha), phosphorus uptake in leaves, flowers, spikes, roots (1.16kg/ha, 0.67kg/ha, 2.62 kg/ha, 0.09 kg/ha) and potassium uptake in leaves, flowers , spikes, roots (2.22 kg/ha, 1.10 kg/ha, 4.66 kg/ha, 0.29 kg/ha). In contrast, increased nitrogen, phosphorus, potassium use efficiency (19.45 kg/kg, 106.57 kg/kg, 66.61 kg/kg), nitrogen, phosphorus, potassium uptake efficiency (0.030 kg/kg, 0.076 kg/kg, 0.089 kg/kg), apparent nitrogen, phosphorus, potassium recovery (2.64%, 6.25%, 5.98%) was recorded to be highest in the treatment vermicompost (5t/ha). Thus, it is apparent from entire investigation that residual nutrients significantly performed on growth, flowering, yield, corm as well nutrient characters in gladiolus under marigold-gladiolus cropping system without compromising quality and yield.
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    ThesisItemOpen Access
    “Effect of graded levels of Nitrogen and Humic Acid on Growth, Yield and Quality of Essential Oil derived from herbage of marigold (Tagetes Patula L.) cv. Arka Pari”
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102 Central Agricultural University (Imphal), 2023-01-28) Ojha, Ritayani; Phurailatpam, Arunkumar; Momin, Ch. Kalkame
    The experiment was laid out in factorial randomized block design with three levels of Humic acid (Control, 20 kg/ha and 40 kg/ha) and four levels of Nitrogen (Control, 100 kg/ha, 150 kg/ha and 200 kg/ha) which was replicated thrice. The observations were recorded in respect of vegetative growth parameters, flowering parameters, yield parameters and quality parameters.The significantly maximum height of plant, number of primary and secondary branches/ plant, plant spread, stem diameter, leaves/plant, fresh weight of leaves and plant and leaf area were recorded in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The flowering parameters in term of days taken to bud initiation, days to flower bud maturity, days to first flowering, days to 50% flowering and days to first harvest was significantly minimum with Humic acid 40 kg/ha as well as Nitrogen 200kg/ha. Whereas, significantly maximum duration of flowering was recorded in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The yield parameters in respect of number of flowers/ plant, fresh weight of flowers, flower yield/ plot and flower yield/ plant, were recorded significantly maximum in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha. Whereas, the highest essential oil yield was observed in Humic acid 40 kg/ha and Nitrogen 150 kg/ha.The quality parameter in respect of flower diameter were recorded maximum in Humic acid 40 kg/ha as well as Nitrogen 200kg/ha.The chemical compositions of hydrodistilled essential oil from the herbage of Tagetes patula cv. Arka Pari were analysed using GCMS (Gas chromatography- Mass spectrometry). The major compounds identified were D- Limonene, cis β- ocimene, trans β- ocimene, Dihydrotagetone, 2- carene, (Z)- myroxide, (E)- Tagetone, (Z)- Tagetone, Levoverbenone, Piperitone, Piperitenone, 3- Carene-5-one, Caryophyllene and Germacrene D.
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    ThesisItemOpen Access
    Morphological and Molecular Characterization of Native Dendrobium Orchid Species of East Siang District, Arunachal Pradesh
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102, 2022-07-16) Reddy, Mahesh; Momin, Kalkame Ch.; Kumar, Sunil
    An investigation was carried out on “Morphological and Molecular Characterization of Native Dendrobium Orchid Species of East Siang District, Arunachal Pradesh”at Department of Floriculture and Landscape Architecture, College of Horticulture and Forestry, CAU (Imphal), Pasighat, Arunachal Pradesh during the year 2021-22. The experiment was laid out in Completely Randomised Design with 15 species (treatments) in three replications. The objectives of the investigation was to characterize the Dendrobium species based on DUS testing guidelines and to assess the genetic and molecular diversity amongst the species. A total of 15 Dendrobium species were characterized for 52 traits by adopting DUS testing guidelines developed by PPV &FRA, New Delhi. Amongst these 21 measurable characters, 5 were monomorphic, 5 dimorphic and 11 polymorphic and out of 31 visuallyassessed DUS descriptors, 2 were monomorphic, 6 dimorphic and 23 polymorphic. Eight traits were identified for grouping of the species viz., plant height, internode number, inflorescence number per shoot, flower width in front view, flower predominant colour, lip predominant colour, lip colour pattern and flowering season. The evaluation of 15 species for quantitative traits revealed that Dendrobium thyrsiflorum and Dendrobium densiflorum werefound promising for highest flower number per inflorescence (32.67 and 29.67 respectively), whereas, Dendrobium aphyllum and Dendrobium lituiflorum hadhighest number of inflorescence and can be used for hanging baskets. Dendrobium nobile (17.33 days) and Dendrobium nobile var. alba (15.67 days) were found promising for cut flower. Earliest flowering (February) was noted in Dendrobium lituiflorum andthe late flowering (May) was observed in Dendrobium wardianum. All the other species flowered during mid-season (March-April).The Dendrobium orchid species were divided into two groups based on hierarchical clusters of the quantitative traits, which is limited to principal component analysis. The highest GCV and PCV values for flower number per inflorescenceare136.13% and 136.35%,respectively.Maximum heritability (99.74%) was observed in inflorescence length and the genetic advance was found highest in plant height (50.44); while genetic advance as percent of mean was noted to be highest in flower number per inflorescence (279.97%). Highest positive and significant genotypic correlation was exhibited in inflorescence number per plant by number of leaves (0.809) which specify the importance of the character in selection for improvement of flower yield. While positive phenotypic correlation on inflorescence number per plant was exerted by number of leaves (0.730) followed by internode number (0.675). DNA extraction was carried out with CTAB method followed by PCR amplification using 25 SSR primers. Eighteen primers showed clear, bright amplicons and polymorphic in nature. The highest PIC (0.90) was shown by CXY09 followed by CXY08 and DOeSSR59 (0.89), respectively. The dendrogram was generated and the species were grouped into 3 major groups by using pooled binary data from SSR analysis.
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    ThesisItemOpen Access
    In vitro propagation of Dendrobium Orchid var. Earsakul
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2021-12-30) Lallemmoi, Khaling; Lallemmoi, Khaling; Kumar, Sunil; Kumar, Sunil; Wangchu, L.; Wangchu, L.
    The first experiment, Performance of plant growth regulators (PGR) combination for callus initiation and formation under 16 hr normal light in which it was observed that T7 (0.25 milligram per litre kinetin + 5 milligram per litre1-Naphthaleneacetic acid) showed shortest days taken for initiation of callus (3.24 days), preceded by T8 (0.5 milligram per litre kinetin + 7.5 milligram per litre1-Naphthaleneacetic acid) which took 3.69 days. The callus weight was maximum at T8 (308.1 mg)which was at par with T7 (261.1 mg) and T2 (255 mg) that contained 0.25 milligram per litreBenzyl Amino Purine+0.05 milligram per litreIndole 3 Acetic Acid. The percentage of callus formed was found to be maximum at T2 (66.66 %) which was at par with T7 (65.86 %) and T8 (65.31 %). The second experiment, Performance of plant growth regulators (PGR) combination for callus initiation and formation under complete dark revealed that the shortest time taken for callus initiation is T02 (0.25 milligram per litreBenzyl Amino Purine + 0.05 milligram per litreIndole 3 Acetic Acid) which formed callus in (4.28 days) precede by T04 (0.25 milligram per litre Kinetin + 0.25 milligram per litre 2,4-D) and T06 (1 milligram per litre Kinetin + 1milligram per litre 2,4-D) which was at par that took 4.55 and 4.66 days respectively. The callus formation percentage was highest for T08 (0.5 milligram per litre Kinetin + 7.5 milligram per litre1-Naphthaleneacetic acid) that showed 43.55 % on the 60th days which was at par with T07 (0.25 milligram per litre Kinetin + 5milligram per litre1-Naphthaleneacetic acid) that was 42.09 %. The weight of callus was recorded to be maximum in T08 (247.45 mg) preceded by T07 (155.43 mg) and T01 (153.22 mg) which was at par. The third experiment, Performance of plant growth regulators for shoot proliferation, where it was found that days for shoot initiation was shortest at S5 (3 milligram per litreBenzyl Amino Purine + 0.6 milligram per litre1-Naphthaleneacetic acid) in 3.41 days, which as similar statistically with S7 (4 milligram per litreBenzyl Amino Purine + 0.8 milligram per litre1-Naphthaleneacetic acid) and S4 (2.5 milligram per litreBenzyl Amino Purine + 0.5 milligram per litre1-Naphthaleneacetic acid) they took 3.50 and 3.56 days respectively. The number of the shoot was initially highest (1.41) at S4 but remained at par with S6 (3.5 milligram per litreBenzyl Amino Purine + 0.7 milligram per litre1-Naphthaleneacetic acid) and the observation on 60th day the no. of the shoot was 1.73 and 1.72 respectively for S4 and S6. The highest shoot length (1.93) was recorded in S2 (1.5milligram per litreBenzyl Amino Purine +0.125milligram per litre1-Naphthaleneacetic acid) at equality with S3 (2milligram per litreBenzyl Amino Purine +0.25 1-Naphthaleneacetic acid). The advanced leaf length was registered in S6 ((3.5milligram per litreBenzyl Amino Purine+0.7 milligram per litre1-Naphthaleneacetic acid). The shoot weight is highest at S3 from the first to final observation maximum weight was recorded to be S3 (619.03 mg) which was at par with S1 (603.13 mg) and preceded by S7 (574.88 mg). The fourth experiment, Performance of plant growth regulators for root proliferation revealed that R4 (0.5 milligram per litreBenzyl Amino Purine + 1 milligram per litreindole butyric acid) significantly take the shortest day for root initiation (2.96 days) preceded by R5 (3.24) and R3 (3.74) that contained 1 milligram per litreBenzyl Amino Purine + 2 milligram per litreindole butyric acid and 0.25 milligram per litreBenzyl Amino Purine + 0.5 milligram per litreindole butyric acid respectively maximum number of roots was found in R4 (3.39) which was at par with R3 (3.36) and R5 (3.31). Root weight is recorded to be maximum in all observations in R3 preceded by R4 the root weight recorded on 60th days for R3 was 11.08 mg which was at par with R4 (10.77 mg). the root length was highest in R4 initially till 30th days but later R3 (1.38 cm) is significantly longer root length preceded by R4 (1.25 cm). Therefore, it is concluded that for in vitro propagation of Dendrobium Orchid var. Earsakul, T8 (0.5 milligram per litre kinetin + 7.5milligram per litre1-Naphthaleneacetic acid) showed better performance than the other treatment for callus formation and proliferation, the explant placed in the 16 hr normal light performed better than the explant placed in complete dark for all the treatment. The treatment combination of S4 (2.5 milligram per litreBenzyl Amino Purine+0.5 milligram per litre1-Naphthaleneacetic acid) was revealed to be best for shoot proliferation and R4 (0.5 milligram per litreBenzyl Amino Purine +1 milligram per litreindole butyric acid) is the best treatment combination for root initiation and proliferation.