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dc.contributor.authorAsif, Muhammad-
dc.description.abstractSoil compaction has become a global problem affecting the soils throughout the world. More demands of food and wood, with increased population, has resulted in intensive cultivation and increased mechanisations of our farmlands and irrigated plantations. Nowadays, agriculture and forestry, in all developped countries and most of the developing countries is carried out through vehicular machines. This vehicular traffic causes soil compaction and affect soils quality physically as well as chemically on every passage. Many studies have been conducted to study soil compaction tolerant agronomic crops but study reporting soil compaction tolerance of trees is scarce. This study was conducted to analyze impact of compacted soil on germination and initial growth stages of principle agro-forest trees of central Punjab. During the first part a comprehensive survey was conducted to identify different levels of soil compaction existing in the field (Lahore, Sheikhupura and Faisalabad). In second part, earthen beds with different compaction levels were prepared to analyse the growth response of eight major agro-forest tree species (Siris, Beri, Kikar, Sufaida, Poplar, Simal, Shisham and Mulbree) of central Punjab. The study was attributed by two factor factorial with RCBD. In the third part of this research work, three month old seedlings were used in the same earthen beds having same compaction level and data was collected on regular basis to check growth response and ameliorative effect against soil compaction. From the survey results it was concluded that livestock has seriously damaged the physico chemical properties of soil as well as status and growth of existing vegetation in Shahdara Plantation. From the field trials of study-2 and study-3, it was concluded that all the eight species grown had been negatively influenced by different levels of soil compaction. The response was depicted by decrease in morphological parameter (i.e. plant height/shoot length, root length, root fresh weight, root dry weight, shoot fresh weight, shoot dry weight, girth/diameter of plant, germination/sprouting %age, survival %age etc) and physiological parameters (i.e. leaf area, photosynthetic rate, respiration rate, stomatal conductance, internal carbon dioxide concentration, photosynthetic water use efficiency etc). The impact of these plant species on soil compaction was found statistically significant (in T1, T2, T3 and T4) except control treatment (T0) at the termination of this trial. Overall negative impact of soil compaction was observed on all the selected speciesen_US
dc.description.sponsorshipHigher Education Commission Pakistanen_US
dc.publisherUniversity of Agriculture, Faisalabad.en_US
dc.subjectAgriculture and Veterinary Sciencesen_US
dc.titleExploring the growth response of major agro-forest trees against soil compaction in Central Punjaben_US
Appears in Collections:PhD Thesis of All Public / Private Sector Universities / DAIs.

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