Thumbnail Image

Theses

Browse

20151
Reset filters
Subject: Crop Physiology × Author: Choudhury, Hemendra × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Carbon sequestration through bamboo plantation
    (AAU, Jorhat, 2015) Choudhury, Hemendra; Kalita, P.
    A study was conducted during 2011-13 in i) inside open top chambers (OTC) with four CO2 concentrations (control, 380, 550 and 750 ppm), ii) in the experimental bamboo field of B N College of Agriculture, AAU Biswanth Chariali (OST) and iii) in farmer’s field of Biswanath Chariali (OFT) to assess the carbon sequestration potential of four bamboo species viz. S1: Bambusa tulda, S2: B. nutans, S3: B. balcooa and S4: Dendrocalamus hamiltonii. The result revealed that with the increase in CO2 concentration from 380 ppm to 750 ppm the seedling height, seedling girth, number of shoot/seedling, phyllochron, leaf number and leaf area/seedling, weight of leaf, branch, main stem, rhizome and whole seedling, specific leaf weight, relative leaf water content, stomatal frequency, stomatal index, stomatal pore area, chlorophyll content, chlorophyll stability index, carotenoid content, Rubisco activity, photosynthetic rate, content of starch, reducing and nonreducing sugar total sugar, non structural carbohydrate and soluble protein of bamboo seedlings showed better results in all four bamboo species tested. Being C3 plant the bamboo seedlings increase the rate of photosynthesis at elevated CO2 concentration and thereby register the higher values of growth parameters. At OST and OFT the S4 maintained the highest average culm height, DBH of culm, cum thickness, RLWC, stomatal frequency, stomatal index, percent pore area of leaf, LAI, Rubisco activity, rate of photosynthesis, content of chlorophyll, carotenoid, soluble protein, starch, total sugar in leaf and content of C, N, P, K in leaf branch, culm and in rhizome. In contrast the S1 registered the poorest performances among all four bamboo species. The S4 produced the highest (260.25 ton/ha) total dry biomass with the highest leaf (7.16 ton/ha), branch (24.83 ton/ha), culm (207.64 ton/ha) and rhizome (10.98 ton/ha) biomass while S1 produced the lowest (212.10 ton/ha) total dry biomass with lowest leaf (3.88 ton/ha), branch (20.36 ton/ha), culm (171.84 ton/ha) and rhizome (8.86 ton/ha) biomass. S4 sequestered the highest total carbon (118.72 ton/ha) followed by S3 (110.00 ton/ha) and S1 sequestered the lowest total carbon (93.52 ton/ha) at 5th year of plantation. The S4 also produced the highest average leaf (1.35 kg), sheath (0.90 kg) and branch (0.12 kg) litter per clump. The bamboo plantation also enriched the soil with organic carbon, available N, P, and K up to 50 cm soil depth. The present study therefore, concludes that bamboo being an efficient carbon sequesterer could contribute tremendously to mitigate the climate change, besides providing other economic and social contributions.