Soil Salinity and Variable Moisture Regimes Impacts on Growth Attributes of Eucalyptus in North-western Punjab, India
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Impact of soil salinity and moisture regimes on eucalyptus
Authors
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Baljit Singh
Punjab Agricultural University, Ludhiana
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G.P.S. Dhillon
Punjab Agricultural University, Ludhiana
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Avtar Singh
Punjab Agricultural University, Ludhiana
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Pritpal Singh
Punjab Agricultural University, Ludhiana
Keywords:
Biomass, Soil salinity, Moisture regimes, Waterlogging, Soluble salts, Net primary production, EucalyptusAbstract
The reclamation of saline waterlogged soils via afforestation depends exclusively on plantation of tolerant tree species with fast growth habits and greater biomass production together with the ability to withstand ambient soil salinity. Soil salinity and water logging significantly influence the growth performance of Eucalyptus species which has large potential as cost-effective and eco-friendly measure for the reclamation of salt affected and waterlogged landscapes. We therefore, studied the response of Eucalyptus (clone PE-11) under aerobic (60% water filled pore space; WFPS) and water logged (120% WFPS) moisture regimes established at four levels of soil salinity (EC1:4=0-12 dS m-1). There was a significant salinity × moisture regimes interaction effect on Eucalyptus growth attributes. These results revealed a significant (p<0.05) decrease in plant height (~33.6-65.2%) and collar diameter (~56.9-73.1%) with increased EC1:2. There was a linear significant relationship between soil salinity and tree height (R2=0.812*-0.996**; p<0.05) for trees planted at 60 and 120% WFPS. Soil salinity (EC1:2=4 dS m-1) significantly decreased the stem biomass by 72.9 g tree-1 (by ~42.1%) than the non-saline soil. Leaves biomass was significantly decreased by ~63.3 g tree-1 at 120% WFPS as compared to 60% WFPS. Soil salinity significantly decreased the leaves biomass by ~32.2, 59.9 and 66.9%, respectively at EC1:2 of 4, 8 and 12 dS m-1 over non-saline soil. Averaged across the soil salinity levels, root biomass was significantly higher by ~6.3-times at 60% WFPS than the 120% WFPS. The decreased plant growth attributes were responsible for reduced dry wood biomass of Eucalyptus. These results revealed that tree growth decreased significantly with increased EC1:2, regardless of the moisture regime. Similarly, regardless of the salinity level, Eucalyptus growth was significantly decreased at increased moisture regime.
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Journal of Soil Salinity and Water Quality serves as an official organ of the Indian Society of Soil Salinity and Water Quality (ISSSWQ) for the publication of research papers, reviews, and short communications as per the constitution and by-laws of the society. Soft and hard copy of the journal are sent free to all its members. All disputes are subject to the exclusive jurisdiction of competent court and forums in Kamal only. The society does not assume any responsibility for opinion by the authors in the articles and no-material in any form can be reproduced without the prior permission of the society. The society is not responsible for any delay, whatsoever, in publication/ delivery of the periodicals to the subscribers due to unforeseen circumstances or postal delay. The society does not vouch for any claims made by the advertisers of products and services. The publisher and the editors shall not be held liable for any consequences in the event of such claim not being honoured by the advertisers.
