Effect of various methods of crop regulation in guava under double-hedge row system of planting.

摘要

A field experiment was conducted on guava cv. Pant Prabhat planted under double-hedge row system. In order to regulate the crop, seven pruning treatments, viz., flower bud thinning by hand (T₁, FBT); flower bud thinning by hand followed by removal of terminal one leaf pair (T₂, FBTT); removal of leaves and flower buds by hand, retaining one leaf pair at the top (T₃, RLFO); removal of all leaves and flowers by hand (T₄, RLF); one leaf pair shoot pruning (T₅, OLPS); full shoot pruning (T₆, FSP); one leaf pair pruning of fruited shoots only (T₇, OLPF) and control (T₈, C) were studied to know their effect on yield of guava. The maximum new shoot emergence (98.31 per branch) for winter season crop was observed with the treatment T₄ (RLF) and minimum with the treatment T₈ (C). The maximum flower bud emergence (23.19 per branch) for winter season crop was recorded with the treatment T₇ (OLPF) and minimum with the treatment T₈ (C). For rainy season crop, there was non-significant difference for these parameters. The maximum number of fruits (499.29 per tree), yield (55.30 kg per tree and 191.90 q per hectare) for winter season were recorded with the treatment T₇ (OLPF) and minimum with the treatment T₈ (C). During rainy season, the reverse trends were observed. The per cent flower/fruit drop followed the reverse trend to that of per cent fruit set. The treatment T₇ (OLPF) recorded the highest cost: benefit ratio.