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Subject: Botany × Author: Lovepreet Singh × Start date: 2021 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of bioinoculants on raising quality planting stock of neem (Azadirachta indica A. Juss.)
    (Punjab Agricultural University, Ludhiana, 2021) Lovepreet Singh; Sharma, Rajni
    The present investigation entitled “Effect of bioinoculants on raising quality planting stock of neem (Azadirachta indica A. Juss.)” was conducted in fields of Department of Forestry and Natural Resources and Laboratory of Department of Soil Science, PAU, Ludhiana during the year 2019-2020.Seeds were collected from healthy plants of neem (Azadirachta indica) and were given five different treatments viz., Azotobacter (T1) (Nitrogen fixer), Pantoea agglomeran (T2) (plant growth promoting rhizobacteria), Pseudomonas fluorescens (T3) (phosphorus solubilizing bacteria), Consortium 1(T4) (PAU recommended), Consortium 2 (T5) (T1+T2+T3) and control to record their morphological, biochemical and nutrient parameters. Readings were recorded at interval of 3 and 6 months from the seedlings raised from these treated seeds. Among all treatments, Pantoea agglomeran (T2) recorded maximum total plant height (35.00 and 50.00 cm), Collar diameter (26.00 and 76.00 mm), number of branches per plant (22.33 and 29.30), leaf area per plant(1.98 and 4.10 cm2) , root length (12.50 and 14.00 cm), fresh weight of shoot (13.51 g and 20.96g), dry weight of shoot(10.51 g and 16.32 g), fresh weight of root (5.77 and 9.88 g), dry weight root(4.01 and 7.81g) sturdiness quotient(0.86 and 0.47) and seedling quality index(4.30 and 9.49) at 3 and 6 months respectively. The available P (35.90 and 37.83 kg/ha) and (0.36 and 0.37) organic carbon, alkaline phosphatase activity (19.69 and 21.26 µgPNP/g/ha), dehydrogenase activity (12.73 and 14.75 µgTPF/g/ha) from soil and nutrient content of root, shoot and leaf portions of neem seedlings was found maximum in soils treated with microbial Consortium 2 (T5) at 3 and 6 months of seedling growth. Among all treatments, Consortium 2 (T5) recorded maximum nutrient content accumulation in all parts of seedlings. Hence these findings also recommend that the application of Consortium 2 (T5) may be used as biological fertilizer to enhance the chlorophyll a, chlorophyll b, total chlorophyll content, total soluble sugars and nutrient composition of 3 and 6 month old seedlings which will further help in better stand establishment.