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Subject: Agroforestry × Author: Satish Kumar × Type: Thesis ×
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    ThesisItemOpen Access
    Biomass Production and Nutrient Contents in 8-year old Poplar Plantation
    (CCSHAU, 2006) Satish Kumar; Ravi Kumar
    In order to study the “Biomass Production and Nutrient Contents in 8-year old Poplar Plantation” 8 years old popular plantations grown under 5x4 m, 10x2.5 m and 15x2.5 m spacing were selected. Seven trees in each spacing were felled for recording observations for biomass production and nutrient analysis. The total amount of biomass production was maximum in 5x4 m spacing, followed by 10x2.5 spacing and minimum in 15x2.5 m spacing. About 75 percent of biomass was contributed by stem only. The concentration of N, P and K was maximum in leaves at 15x2.5 m spacing and decreased with decrease in spacing. Secondary nutrients (Ca, Mg, S) also followed the similar trend. Their concentration was also maximum in leaves. Concentration of Zn, Fe, Cu and Mn was recorded maximum in 1.5x2.5 m spacing and decreased with increase in spacing. Zn and Cu concentration were maximum in leaves, while the concentration of Fe & Mn were higher in roots. The uptake of all nutrients analysed was maximum at 5 x4 m spacing and their major portion was accumulated in the stem in all the spacings. In soil concentration of available N, P, K, Ca, Mg, S & micronutrients were maximum at surface layer in all the spacing, which decreased with increase in sampling depth.
  • Thumbnail Image
    ThesisItemOpen Access
    Biomass Production and Nutrient Contents in 8-year old Poplar Plantation
    (CCSHAU, 2006) Satish Kumar; Ravi Kumar
    In order to study the “Biomass Production and Nutrient Contents in 8-year old Poplar Plantation” 8 years old popular plantations grown under 5x4 m, 10x2.5 m and 15x2.5 m spacing were selected. Seven trees in each spacing were felled for recording observations for biomass production and nutrient analysis. The total amount of biomass production was maximum in 5x4 m spacing, followed by 10x2.5 spacing and minimum in 15x2.5 m spacing. About 75 percent of biomass was contributed by stem only. The concentration of N, P and K was maximum in leaves at 15x2.5 m spacing and decreased with decrease in spacing. Secondary nutrients (Ca, Mg, S) also followed the similar trend. Their concentration was also maximum in leaves. Concentration of Zn, Fe, Cu and Mn was recorded maximum in 1.5x2.5 m spacing and decreased with increase in spacing. Zn and Cu concentration were maximum in leaves, while the concentration of Fe & Mn were higher in roots. The uptake of all nutrients analysed was maximum at 5 x4 m spacing and their major portion was accumulated in the stem in all the spacings. In soil concentration of available N, P, K, Ca, Mg, S & micronutrients were maximum at surface layer in all the spacing, which decreased with increase in sampling depth.