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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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2011 - 201928
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Subject: Fruit Science × End date: 2019 × Start date: 2011 × Thesis Type: M.Sc ×
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Now showing 1 - 9 of 28
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    ThesisItemOpen Access
    Study on Genetic Diversity of Carambola (Averrhoa carambola L.) found in North East India
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2019-08-17) Lalmuanpuii, R.; Singh, Romen; Wangchu, L.
    The experimental results showed that individual fruit weight ranged from 24g (P10) to 117g (P16); fruit length 6.10cm (P10) to 12.16cm (P16); fruit breadth 3cm (P18) to 7.10cm (P16); volume of fruit 24ml (P10) to 116.6ml (P16); seeds/fruit 1.33 (P10 and P14) to 5 (P5, P6, P11, P13, P15, P16, P17 and P19); fruit yield 240 fruits per tree per year (P6) to 625 fruit/tree/year (P9); TSS 4.8 (P15) to 14.50Brix (P9); Oxalic Acid 0.01% ( P2, P8, P10, P14, P17 ) to 0.06% ( P13); Ascorbic acid 28.00 (P12) to 65.00 mg/ 100g (P14); acidity 0.13% (P8) to 1.32%(P13); reducing sugar 3.7% (P20) to 11.9% ( P9) and total sugars 4.1%(P20) to 12.50% (P9). Based on the results obtained from the present investigation, it can be concluded that, selected carambola genotypes exhibited noticeable variation in the morphological and genetical characteristics. The genotypes P9 exhibited maximum yield (625 fruits per tree per year), P9 highest TSS (14.50Brix), P10 and P14 lowest seeds/fruit (1.33), P1`4 highest vitamin C content (65mg/100g) and P16 highest fruit weight (117g). RAPD molecular marker also showed considerable variation in which out of the 20 RAPD markers used 15 primers generated 92 total numbers of band and 64 polymorphic bands with a mean of 4.26 bands per primer and 69.34% polymorphism. Dendrogram of the banding profile showed that the genotypes P1 and P20 are distantly related and P1 and P2 are closely related to each other. Thus, these findings illustrated the usefulness of morphological characterization and RAPD molecular marker as a logical method and useful tool for screening genetic diversity and will be useful for further crop improvement work for the development of superior genotype in the future.
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    ThesisItemOpen Access
    Effect of Organic Manures on Growth, Yield and Quality of Assam Lemon [Citrus limon (L.) Burm.]
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2019-08-17) PACHUAU, Rosangpuii; Singh, Barun; Wangchu, L.
    The experiment was laid out in Randomized Block Design (RBD) with 12 treatments and 3 replications. The treatments applied were: T1 – Control, T2 - RDF: N:P:K (100:100:100 g/plant/year), T3 - FYM (20kg/tree), T4 - Vermicompost (10kg/tree), T5 - Neem Cake (2kg/tree), T6 - Mustard Oil Cake (2kg/tree), T7 - FYM (10 kg/tree) + Neem Cake (1kg/tree), T8 - FYM (10kg/tree) + Mustard Oil Cake (1kg/tree), T9 - Vermicompost (5kg/tree) + Neem Cake (1kg/tree), T10 - Vermicompost (5kg/tree) + Mustard Oil Cake (1kg/tree), T11 - FYM (10kg/tree) + Mustard Oil Cake (1kg/tree) + Neem Cake (1kg/tree) and T12 - Vermicompost (5kg/tree) + Mustard Oil Cake (1kg/tree) + Neem Cake (1kg/tree) Experimental findings showed that the imposition of different treatments had a significant effect on improving the growth, yield and quality of the fruits. Maximum number of fruits/plant (85.66), fruit set (30.02%) and yield/plant (9.60 kg), juice content (47.46 ml/fruit), TSS (5.78 °B), total sugar (6.19%), reducing sugar (3.62%), ascorbic acid (52.63 mg/100 g), available nitrogen (430.52kg/ha), available phosphorus (57.30kg/ha), available potassium (306.13kg/ha), organic carbon (2.62%), total nitrogen (2.35%), total phosphorus (0.16%) and total potassium (1.66%) was recorded by treatment T10 - Vermicompost (5kg/tree) + Mustard Oil Cake (1kg/tree). However, non-significant effect was found in the vegetative growth characters.
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    ThesisItemOpen Access
    To Study the effect of PGR on rooting of leaf-bud cuttings in Assam Lemon (Citrus limon(L) Burm.).
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2019-07-11) Amin, Rohullah; Wangchu, L.; Sarma, P.
    An investigation To Study the Effect of PGR on Rooting of Leaf-bud Cuttings in Assam Lemon (Citrus limon(L) Burm.) was carried out during the year 2018 - 2019in the polyhouse, citrus block, Department of Fruit Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. It is geographically located at 28° 04’ 43” N latitude and 95° 19’ 26” E longitude with an altitude of 153 m above mean sea level.The present investigation was carried out in completely randomized design (CRD) in the raised beds inside the polyhouse and replicated thrice. The prepared cuttings were treated with different doses of IBA, NAA and their combination in powder form and planted in raised beds in polyhouse.The experiment was laid out in Completely Randomized Design having thirteen treatments i.e. T1 (Control), T2 (1000 ppm IBA), T3 (2000 ppm IBA), T4 (3000 ppm IBA), T5 (4000 ppm IBA), T6 (1000 ppm NAA), T7 (2000 ppm NAA), T8 (3000 ppm NAA), T9 (4000 ppm NAA), T10 (500 ppm IBA + 500 ppm NAA), T11 (1000 ppm IBA + 1000 ppm NAA), T12 (1500 ppm IBA + 1500 ppm NAA), T13 (2000 ppm IBA + 2000 ppm NAA). From the present study, it can be concluded that the treatment T2 (1000 ppm IBA) was found to be best for rooting of leaf-bud cuttings and survival percentage of Assam lemon (Citrus limon L Burm). Over all, the treatment T2 (1000 ppm IBA) gave the significant response in respect to all the shoot and root parameters during the observation periods i.e., days taken to first shoot initiation, height of first shoot initiation from ground level, number of shoots per plant, length and girth of shoots, number of leaves per shoot, number of roots, length and girth of roots, fresh and dry weight of roots and survival percentage in the foot hills of Arunachal Pradesh.
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    ThesisItemOpen Access
    Response of different Citrus species of Arunachal Pradesh against Aluminum and Manganese Toxicity
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2019-07-01) Khongla, Lakidon; Wangchu, L.; Hazarika, B.N.
    The effects of Aluminium and Manganese toxicity, applied singly or in combination, on the growth, photosynthetic attributes, oxidative stress and anti-oxidative capacities of 5 citrus species were evaluated in this study. This experiment was taken up to understand the tolerance mechanism of citrus to the toxicities which occur in acid soils and to identify species better suited for such soils. In this experiment, Rough lemon (Citrus jambhiri), Rangpur lime (Citrus limon), Indian wild orange (Citrus indica) and two local citrus species viz., Tasi and Samphola were evaluated for a period of 20, 40 and 60 days in a sand culture experiment wherein 3 doses of Mn (0, 300 µM, 600 µM) and 4 doses of Al (0, 600 µM, 1200 µM, 1800 µM) were incorporated, either singly or in combination, to their nutrient solutions. Here, morpho-physiological parameters indicate a significant negative impact of the treatments on all the citrus species with growth inhibition by Mn treatments more pronounced in shoots while Al affected root growth more than shoot. Chlorophyll content and total soluble protein also declined with the increase in treatment concentration and exposure time although the least decline was observed in Samphola followed by Rough lemon. The peroxidation of lipids and the accumulation of reactive oxygen species (ROS) viz., superoxide anion (O2•-), hydroxyl free radical (-OH) and hydrogen peroxide (H2O2) revealed that Tasi followed by Rangpur lime was the most sensitive as both species recorded high amounts of ROS when compared with other species indicating that they may show lower resistance to the stresses induced. Al content in citrus shoots and roots also elevated with the increase in their concentrations and exposure time. Mn content also increased in both shoots and roots, however, addition of Al (600 µM) resulted in lower Mn accumulation (300 µM) than compared to the same treatment applied singly and this reduction was also reflected in lowered negative impact of physical parameters, particularly, shoot length, shoot weight (fresh and dry), relative water content and other parameters including lipid peroxidation and ROS accumulation. Antioxidants, both enzymatic and non-enzymatic, showed heightened activities in all the citrus species with the increase in time exposure although non-ezymatic antioxidants (ascorbic acid and tocopherol) progressively declined with time. The comparatively low antioxidant capacity of Tasi and Rangpur lime reflects their low resistance as evident from their high ROS production as well as more severe decline in their physical growth. Therefore, on considering the tolerance levels of the citrus species by their antioxidative defense, this experiment revealed that Samphola, followed by Rough lemon and Indian wild orange exhibited better tolerances to both Mn and Al toxicity while Tasi and Rangpur lime exhibited comparatively lower resistance to these stresses. It can also be concluded that antagonistic relationship is observed between Al and Mn although the effect is dose responsive as it is seen only in the lowest doses of both Al and Mn.
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    ThesisItemOpen Access
    Effect of GA3 and pruning on flowering and yield in Assam Lemon [Citrus limon (L.) Burm.] under foothills of Arunachal Pradesh
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2016-08-30) N., Mahesha; Singh, S. Romen; Hazarika, B.N.
    Experimental fallout revealed that the imposition of different treatments and had a significant effect on growth, flowering, yield and quality parameters of the fruit. Highest increase in plant height (29.20 cm), yield per tree per season of winter (5.28 kg), yield per plant (10.19 kg), yield per ha (11.32 t), fruit weight (121.92 g), fruit length (10.14 cm), fruit juice of winter (48.20 ml), TSS of summer (7.40 0Brix) and winter (7.50 0Brix), ascorbic acid of winter (49.94 mg/100g) and total sugar of winter (2.00%) were recorded by G1P1, i.e., (GA3 50 ppm single spray+15 cm shoot pruning) it also lowers titratable acidity of winter (3.67%). Whereas G3P1 i.e., (GA3 50 ppm double spray+15 cm shoot pruning) recorded highest canopy spread (0.73 m3), number of fruitlets per branch (6.95) and it increases fruit juice of summer (45.20 ml), reducing sugars of winter (1.79%), ascorbic acid of summer (43.32 mg/100g), chlorophyll content (0.51 mg/100 g) as well as lowering titratable acidity of summer (3.66%). Wherein G4P1 i.e., (GA3 100 ppm double spray+15 cm shoot pruning) postponed harvesting to (207.80) days though non significantly. Nevertheless, fruit breadth and shelf life had a non significant increase over control. Thus, the experiment concluded that the treatment combination G1P1 i.e., (GA3 50 ppm single spray+15 cm shoot pruning) is most promising with results to meet the objectives of the experiment.
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    ThesisItemOpen Access
    Effect of Organic and Inorganic Fertilizers on Growth, Yield and Quality of Papaya (Carica papaya L.) cv. Vinayak
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2017-07-25) Konyak, Shangpong M.; Wangchu, L.; Singh, Barun
    The present investigation to study the effect of organic and inorganic fertilizers on growth, yield and quality of papaya (Carica papaya L.) cv. Vinayak was carried out during January-December 2016 at Fruit Research Farm, Department of Fruit Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh. The experiment was laid out in Randomized Block Design with 13 treatments and 3 replications. The treatments were T1 ( 200 g N + 200 g P + 250 g K ),T2 (20 kg FYM), T3 (100 g N + 100 g P + 125 g K + 10 kg FYM), T4 (200 g N + 200 g P + 250 g K + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g), T5 (20 kg FYM + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g), T6 (100 g N + 100 g P + 125 g K + 10 kg FYM + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g), T7 (200 g N + 200 g P + 250 g K + Azotobacter 50 g + phosphate solubilizing bacteria 50 g),T8 (200 g N + 200 g P + 250 g K + Azotobacter 50 g), T9 (20 kg FYM + Azotobacter 50 g + phosphate solubilizing bacteria 50 g), T10 (20 kg FYM + Azotobacter 50 g), T11 (100 g N + 100 g P + 125 g K + 10 kg FYM + Azotobacter 50 g + phosphate solubilizing bacteria 50 g), T12 (100 g N + 100 g P + 125 g K + 10 kg FYM + Azotobacter 50 g) and T13 (control). The treatment, T4 (200 g N + 200 g P + 250 g K + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g) was found to significantly increase vegetative growth parameters including plant height (306.6 cm), stem girth (44.2 cm), number of leaves produced (126.6) and yield and yield attributing characters like fruit size (length = 22.6 cm and girth = 14.6 cm) , average fruit weight (1.4 kg) fruit yield per plant (33.8 kg/plant) followed by T7 (200 g N + 200 g P + 250 g K + Azotobacter 50 g + phosphate solubilizing bacteria 50 g) and least was observed in control. The minimum days to first flowering (105) and harvest (277) were recorded for the same treatment. With regards to quality parameters like total sugars, reducing sugars, non reducing sugars and ascorbic acid, treatment T6 (100 g N + 100 g P + 125 g K + 10 kg FYM + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g) recorded the highest value. The observations recorded non significant were titratable acidity and TSS of the fruits. With respect to NPK content in leaf tissues, highest was recorded under T6. From the results of the present study, it can be concluded that the treatment, T4 i.e. 200 g N + 200 g P + 250 g K + Azotobacter 50 g + phosphate solubilizing bacteria 50 g + Azospirillum 50 g is the best treatment with respect to growth, yield and quality parameters in papaya.
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    ThesisItemOpen Access
    Effect of micronutrients and plant growth regulators on growth, yield and fruit quality of litchi (Litchi chinensis Sonn.) cv. Muzaffarpur under foothills of Arunachal Pradesh
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2017-07-26) R., Devaraja; Hazarika, B.N.; Wangchu, L.
    The effect of different micronutrients and plant growth regulators significantly influenced the plant growth characters viz., per cent increase in plant height (5.26 %) and per cent increase in canopy spread (6.12 %) which was recorded highest in T8 and was at par with T7. Shortest duration of flowering (21.63 days) was recorded by T6 at par with T5. Most of the fruit and yield parameters were significantly increased in which the highest fruit set was recorded in T5 (42.84 %) followed by T4 (42.10 %). The highest fruit size (37.30 mm) was recorded in T3 and was followed by T7 (37.04 g). Significantly increased fruit weight (22.88 g), aril weight (15.61 g) and juice content (9.89 ml) and decreased fruit cracking (5.07 %) was recorded in T7. Number of fruits per tree (1162.66), maturity (69.33 days) and fruit yield (26.82 kg/tree) were found to be significant and highest were recorded in T8 which is at par with T7. TSS (18.09 °Brix), total sugar (26.13 %), reducing sugar (14.49 %) and ascorbic acid (38.06 mg/100 ml) differed significantly where T1 recorded the highest and was observed to be at par with T7. Titratable acidity and malic acid however, were not significantly affected. All the shelf life parameters were significantly influenced by micronutrients and PGRs. The decreased PLW (11.46 %) was recorded in T8 and highest number of days in room temperature (3.93 days) was recorded in T7. Organoleptic test viz., colour (7.70), taste (8.08) and aroma (7.65) were significantly influenced by all treatments though highest was recorded in T1. From the present study it can be concluded that T8 was found to be significantly increased plant height, and canopy spread so it is best for vegetative growth parameters while, T1 significantly increased colour, taste, aroma and most of the biochemical parameters. So it can be concluded that T1 was best for most of the shelf life and quality parameters. T7 recorded significantly increased fruit weight, aril weight, juice content, number of days at room temperature and most of the parameters like plant height, canopy spread, maturity, number of days in room temperature, fruit yield, fruit size, physiological loss in weight, aroma, total soluble solids, total sugar, reducing sugar and ascorbic acid were found to be at par with highest whereas seed size was lowest. By this it can be concluded that T7 is best for growth, yield, shelf life and quality of litchi cv. Muzaffarpur.
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    ThesisItemOpen Access
    Identification and characterization of superior genotypes of Carambola (Averrhoa carambola L.) found in Arunachal Pradesh
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2017-08-25) Padun, Rebika; Singh, S. Romen; Hazarika, B.N.
    The experimental result showed that individual fruit weight ranged from 83.63 g (P20) to 300.00g (P14); fruit diameter 4.07 cm (P5) to 9.13 cm (P14); fruit length 6.83 cm (P4) to 15.93 cm (P14); juice content 25.00 ml (P4) to 61.67 ml (P14); seed/fruit 2.00 (P1) to 4.67 (P12); fruit yield 84.33 kg (P4) to 185.00 kg/tree (P8); TSS 5.03 (P12) to 14.97 0Brix (P11); Oxalic acid 0.01% (P2, P3,P5, P7,P8,P14 and P18) to 0.35% (P9); Ascorbic acid 25 (P17): to 68.00 mg/100g (P9); acidity 0.08 % to 1.22%; reducing sugar 3.20% (P3) to 11.93%; total sugars 3.40% (P3) to 12.80%(P11) and shelf life 10.67 days (P10) to 14 days (P17). Based on the results obtained from the present investigation, it can be concluded that, selected carambola genotypes exhibited noticeable variation in the morphological and biochemical characteristics. The genotypes P8 maximum yield (185 kg per tre per year), P11 highest TSS (14.950Brix), P1 lowest seed (2), P9 highest vitamin C (68mg/100g), P14 highest fruit weight (300g). SDS-PAGE analysis also showed considerable variation in band number of protein wich ranged from 14-38. Protein banding profile showed that the genotypes P6 and P4 are distantly related and P4 and P13 are closely related to each other. Thus, these findings illustrated the usefulness of physico-chemical characterization and biochemical marker as a tool for the crop improvement programs in carambola for screening the sweet genotype from the available genetic diversity and it will be useful for the development of a clonal variety in future.
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    ThesisItemOpen Access
    Effect of growth regulators and time of air layering in litchi (Litchi Chinensis Sonn.) cv. Muzaffarpur
    (College of Horticulture and Forestry, Central Agricultural University, Pasighat, 2015-08-22) Longdo, Rishi; Wangchu, L.; Singh, S. R.
    The experiment on the effect of growth rergulators and time of air layering in litch (Litchi chinensis Sonn.) cv. Muzaffarpur was carried out at Fruit Research Farm, Department of Fruit Science, College of Horticulture and Forestry, Central Agricultural University, Pasighat, Arunachal Pradesh in the year 2014 – 2015. The experiment wa laid out in completely Randomized Design (CRD) with two factors i.e. Month and PGR, with 3 level in month and 7 levels in PGR, with three replications of each level. The PGR treatments were IBAA (1000 ppm), IBA (2500 ppm) and IBA (3000ppm), IBA (5500ppm), NAA (5000 ppm), IBA + NAA (4500 ppm + 200 ppm) and control. Use of T6 (IBA 4500 ppm + 200ppm) during the month of July for air layering significantly influence the days of first root initiation, fresh weight of primary roots, dry weight of secondary roots and survival percentage of air layers. Also the sifnificant influence were resulted in numbers of primary roots and numbers of secondary roots by the use of T5 (NAA 5000 ppm) during the month of August and July respectively. The combination of T3 (IBA 3000 ppm) in the month of August significantly increased the dry weight of primary roots. Use of T1 (IBA 1000 ppm) in the month of September significantly increased the survival percentage of air layers.