In Central India, an experiment was carried out on a 22 year old Dalbergia sissoo based agrisilviculture model in 2020-21 to investigate the response of different pruning intensities on Rabi seasonal diameter growth, timber production, CAI of total biomass, and carbon sequestration potential. Each year, paddy followed by wheat is grown under trees spaced at 5m × 5m continuously being treated with four different pruning intensities, i.e., 0% (P0: No pruning), 25% (P25: Light pruning), 50% (P50: Moderate pruning) and 75% (P75: Heavy pruning) of the total tree height. It was reported that different rates of pruning had a significant effect. Maximum Rabi seasonal D.B.H. increment was recorded in P0 (0.68 cm) and minimum in P75 (0.49 cm). Maximum seasonal yield of large-sized timber, small-sized timber, and fuelwood (5.80 m3 ha-1, 0.62 m3 ha-1 and 7.48 q ha-1, respectively) were recorded under light pruning treatment (P25). However, the minimum seasonal yield of large-sized timber and fuelwood (5.80 m3 ha-1 and 5.14 q ha-1, respectively) were under heavy pruning (P75) and the minimum seasonal yield of small-sized timber (0.32 m3 ha-1) under moderate pruning (P50). Maximum annual above-ground biomass, annual below-ground biomass and current annual increment of total biomass (171.63 q ha-1 yr-1, 34.33 q ha-1 yr-1, and 205.95 t ha-1 respectively) were recorded under light pruning treatment (P25), while minimum (84.50 q ha-1 yr-1, 16.90 q ha-1 yr-1 and 101.40 t ha-1 respectively) under heavy pruning (P75). Carbon sequestration potential was reported to be higher with light pruning (92.68 q ha-1 yr-1), followed by moderate pruning (63.69 q ha-1 yr-1), while minimum under heavy pruning (45.63 q ha-1 yr-1) and no pruning (46.91 q ha-1 yr-1) at all. It was concluded that light pruning of 25% was best among the four treatments in terms of timber and biomass yield.
The experiment was carried out in a Pongamia pinnata-based agroforestry system to assess the impact of land use systems, sowing dates, and wheat varieties on wheat cultivation at the Forestry Research Farm, JNKVV, Jabalpur during the Rabi season of 2021-22 The experiment followed a three-factor double split plot design with two systems (open system and agroforestry system) as the main plot, three sowing dates (12th November, 27th November, and 12th December) as subplots, and two wheat varieties (MP-3336 and GW-322) as sub-sub plots. The results showed that the open system outperformed the agroforestry system in terms of plant population, plant height at harvest, grain yield, straw yield, biological yield, and harvest index. Early-sown wheat consistently showed better performance in most parameters compared to timely-sown and late-sown varieties. Among the wheat varieties, the MP-3336 variety exhibited higher plant population, while the GW-322 variety showed taller plants at harvest, longer spikes, higher grain yield, and better harvest index. These findings provide valuable insights into optimizing wheat cultivation in agroforestry systems and emphasize the importance of considering land use systems, sowing dates, and wheat varieties to maximize crop productivity.
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