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Dr. Y. S. Parmar University of Horticulture & Forestry, Solan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Solan, was established on 1st December, 1985 with the objective to promote education, research and extension education in the fields of Horticulture, Forestry and allied disciplines. Late Dr. Yashwant Singh Parmar, the first Chief Minister and the architect of Himachal Pradesh perceived the importance of Horticulture and Forestry to develop and improve the State economy which led to the establishment of this University. Its history lies in erstwhile Himachal Agricultural College, Solan, established in 1962 and affiliated to the Panjab University. It became one of the campuses of Agriculture Complex of Himachal Pradesh University on its formation in 1970. Consequent upon the establishment of Himachal Pradesh Krishi Vishvavidyalaya in 1978, this campus became its Horticulture Complex and finally in 1985, assumed the status of a State University, being the only University in the country engaged exclusively in teaching, research and extension in Horticulture and Forestry. The University is located at Nauni in Solan District of Himachal Pradesh, 13 km from Solan on Solan-Rajgarh Road, at an elevation of 1300 metres above mean sea level. Solan town is situated on national highway (NH-22) and is well connected by train and bus services. The University has four constituent colleges, out of which, two are located at the main campus Nauni, one for horticulture and the other for forestry, having 9 and 7 departments, respectively. The third College i.e., College of Horticulture & Forestry is located at Neri in Hamirpur District on Nadaun-Hamirpur state highway, about 6 Km from Hamirpur town and is well connected with bus service. The college offers three Undergraduate Degree Programmes i.e. BSc (Hons.) Horticulture, BSc (Hons.) Forestry and B. Tech. Biotechnology and MSc degree programme in a few subjects. The fourth college i.e. College of Horticulture and Forestry, Thunag (Mandi) is located at Thunag District Mandi. This college offer BSc (Hons.) Horticulture and BSc (Hons.) Forestry degree programme. In addition, there are five Regional Research Stations, 12 Satellite Stations and five Krishi Vigyan Kendras (KVKs) situated in different zones of the State.

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20211
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Subject: Fruit Science × Author: SHARMA, SHIVANI × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    MANIPULATION OF CROP LOAD IN APPLE (Malus × domestica Borkh.) UNDER HIGH DENSITY PLANTATION
    (UHF,NAUNI, 2021-09) SHARMA, SHIVANI; VERMA, PRAMOND
    ABSTRACT The present investigation entitled “Manipulation of crop load in apple (Malus × domestica Borkh.) under high density plantation” was carried out in high density apple orchard of Department of Fruit Science, Dr Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during the year 2020-21, in order to find out the optimum level of crop load for quality fruit production under high density plantation through chemical and manual thinning. The experiment consist of ten thinning treatments (T1 – NAA @ 10 ppm; T2- NAA @ 20 ppm; T3- BA @ 100 ppm; T4- BA @ 200 ppm; T5-Metamitron @ 100 ppm; T6-Metamitron @ 200 ppm; T7- Crop load of 4 fruits/cm2 TCSA; T8- Crop load of 6 fruits/cm2 TCSA; T9- Crop load of 8 fruits/cm2 TCSA and T10- Control) and three cultivar treatments (C1 – Jeromine; C2- Redlum Gala and C3- Super Chief) replicated thrice and was laid out in Randomized Block Design (factorial). Both chemical and manual thinning was applied at 10 days after petal fall (fruitlets with 10-12 mm diameter). The result obtained from the experiment depicted that the highest yield (12.69 kg/tree) was recorded in crop load of 8 fruits/cm2 TCSA. However, the crop load of 4 fruits/cm2 TCSA resulted in best quality fruits in terms of maximum fruit length ( 62.03 mm), diameter (71.28 mm), weight (154.48 g), volume (180.28 cc), firmness (9.04 kg/cm2), red skin colour (96.67%), TSS (14.51 °B), total sugars (13.86%), reducing sugars (9.57%), non-reducing sugars (4.07%), anthocyanin content (0.62 OD), return bloom (43.64) and minimum titratable acidity (0.19%), followed by crop load of 6 fruits/cm2 TCSA through manual thinning and NAA @ 20 ppm in case of chemical thinning in comparison to control (no thinning). With respect to cultivars, highest extent of thinning (45.82%), return bloom (36.67), TSS (12.99 °B), total sugars (11.80%) and reducing sugars (8.39%) was recorded in Redlum Gala. Whereas, the Jeromine cultivars recorded maximum fruit length (60.46 mm), diameter (68.94 mm), weight (135.09 g), volume (170.16 cc), red skin colour (95.10%) and anthocyanin content (0.62 OD). The treatment combination T7C1(Crop load of 4 fruits/cm2 + Jeromine) recorded highest fruit length (65.26 mm), diameter (73.89 mm), weight (157.53 g), volume (184.43 cc), whereas, the highest TSS (15.36 °B), total sugars (14.22%), reducing sugars (10.21%) was recorded in T7C2 (Crop load of 4 fruits/cm2 + Redllum Gala) in comparison to all other treatment combinations. Hence, the optimum level of crop load for quality fruit production in apple under high density plantation ranged from 4-6 fruits/cm2 TCSA.