“Influence of Pruning and Biofertilizers on Growth, Yield and Quality of Lemon [Citrus limon (L.) Burm.] cv. ‘Assam lemon’ Under Foothills of Arunachal Pradesh”.
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Date
2022-10-10
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College of Horticulture and Forestry, Central Agricultural University, Pasighat -791102
Abstract
To study the effect of biofertilizers, pruning and their combine effect on growth, flowering, fruiting and fruit quality in Assam lemon. The research work entitled “Influence of Pruning and Biofertilizers on Growth, Yield and Quality of Lemon [Citrus limon (L.) Burm.] cv. ‘Assam lemon’ Under Foothills of Arunachal Pradesh” was conducted during 2021-2022 at the Experimental Farm of Department of Fruit Science, College of Horticulture and Forestry, CAU, Pasighat, Arunachal Pradesh. The experiment was laid out in factorial RBD with two levels of pruning (pruning 25% and 50%), four treatments of biofertilizer viz; PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plant and combination of PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plant and the interaction effect of pruning (pruning 25% and 50%) and biofertilizers (PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plant).
As a resultant of which it is evident that high level of pruning (terminal pruning at 50% length of shoot) and combination of biofertilizers (PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plant) was found best for enhancing the growth, flowering, yield and quality of Assam lemon fruits. Further, earliest sprout initiation (15 days), number of shoots emerged per pruned shoot (6), length of emerged shoots (54 cm), number of leaves per shoot (46), trunk circumference (4 cm), days required for first flowering (322 days), number of flowers per shoot (105), earliness in flowering (18 days), fruit yield (4 kg/plant), fruit length (60 mm), fruit width (91mm), fruit volume (84cm3), fruit weight (104g), peel weight (45g), average number of seeds per fruit (0.25), titratable acidity (5.90%), ascorbic acid content (141.08 mg/100g), juice (40ml), total sugar (9.84%), reducing sugar (2.20%), non-reducing sugar(7.75%), pH of juice (2.23), chlorophyll-a (0.54 mg/g), chlorophyll-b content (0.30mg/g), total chlorophyll content (0.82 mg/g) and carotenoid (27.46 mg/g fresh weight) was recorded highest in treatment P2B4 (Pruning 50% length of shoots + PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plant).
Hence, the treatment combination of pruning at 50% length of shoots + PGPR (Pseudomonas fluorescens) @ 90g/plant, Trichoderma @ 90g/plant, Azotobacter @ 15g/plantmay be recommended to get the maximum growth, flowering, yield and best fruit quality in Assam lemon.
Description
Citrus (Citrus sp.) is one of the world's major fruit crop, grown in many tropical and subtropical nations with diversified cultivated species. It is a member of the Rutaceae family, which comprises 140 genera and 1300 species. Fruits of lemon (Citrus limon Burm.) are evident in variety of shapes, commercially produced in Assam followed by Bihar, West Bengal, Punjab, Orissa, Rajasthan, and Tripura.Among lemon group,Assam lemon (Citrus limon Burm.) has significant demand in national as well as international market owing to its characteristic aroma, vitamin C content, carotenoids, folate, fibre, zero fat and rich source of natural antioxidants