Abstract
The present experiment was conducted at the Germplasm Centre (GPC) of the Fruit Tree Improvement Program (FTIP), Bangladesh Agricultural University, Mymensingh, during the period from June to October, 2013 to investigate the effects of scion defoliation and stock leaf retention on growth of grafted Lime (cv. BAU lime-1). The experiment consisted of two factors such as Factor A: four scion defoliation periods viz., defoliation before 9 days of grafting, defoliation before 6 days of grafting, defoliation before 3 days of grafting and defoliation on the day of grafting and Factor B: retention of leaf on rootstock below graft union viz., rootstock with leaf and rootstock without leaf. The study was laid out following Randomized Complete Block Design (RCBD) with three replications. The grafts were kept under observation in poly tunnel condition. Results revealed that highest graft height, (45.47 cm), number of leaves (15.72) and branches (2.92), length of the largest leaf(8.45cm), breadth of the largest leaf(3.77cm) were observed when scions were defoliated 6 days before grafting and lowest graft height (38.72 cm), number of leaves (12.12) and branches (2.25), length of the largest leaf(5.60cm), breadth of the largest leaf(3.37cm) were observed when scions were defoliated on the day of grafting. In respect of retention of leaves on rootstock, the highest graft height (43.83 cm), number of leaves (15.62) and branches (2.82), length of the largest leaf(7.47cm), breadth of the largest leaf(3.78cm) were found when grafting was done on rootstock with leaves and lowest graft height (39.78 cm), number of leaves (11.32) and branches (2.48), length of the largest leaf(6.57cm), breadth of the largest leaf(3.40cm) were found when grafting was done on rootstock without leaves. Therefore, the maximum growth in grafted lime seedlings can be achieved if scion defoliated 6 days prior to grafting operation and leaves are kept on root stock below graft union.Asian J. Med. Biol. Res. March 2018, 4(1): 44-48
Highlights
Climatic condition of Bangladesh is suitable for growing many tropical and sub-tropical fruits
Effect of scion defoliation period Significant variations were observed in all parameters due to the effect of scion leaf defoliation period
The graft height was significantly influenced by different scion defoliation periods, the highest graft height (45.47 cm) was found when the grafting was done with the scion defoliated 6 d ays before grafting and the lowest graft height (38.72 cm) was recorded from scion defoliated on the day of grafting
Summary
Climatic condition of Bangladesh is suitable for growing many tropical and sub-tropical fruits. Some major fruits like mango, pineapple, banana, litchi, lemon, guava, papaya, coconut are grown in large scale in the country. Lime (Citrus aurantifolia) is remarkable among the fruits, which is one of the important, popular and nutritious fruits in the world. 68721 metric tons lime and lemon were produced in 5786 acres land during the year 2014-2015 (BBS 2015). Lime under the family Rutaceae probably originated in India and spread to the Middle East and other tropical and subtropical countries. The current major citrus producing countries in the world are Spain, USA, Israel, Morocco, South Africa, Japan, India, Turkey and Cuba (Patil, 2009). Due to the high content of vitamin C, citrus fruits are used in the treatment of scurvy. The anti-scurvy effect of citrus fruits is very
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