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| Effects of Different Rootstocks on Seedling Growth and Side Branch Germination of Grafted Watermelon |
| LI Wei-qiang1，CHE Ya-li1，ZENG Feng1，SONG Quan-bin1，XIE Feng-chun1，WANG Wen-jun2* |
| 1Jinan Sanyuan Horticulture Science and Technology Co. LTD.，Jinan 250100，Shandong，China；2Jinan Institute of Agricultural Sciences，Jinan 250316，Shandong，China |
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Abstract This paper took watermelon cultivar ‘Xiaolan’ as scion；selected 6 cucurbit rootstocks and 4 pumpkin rootstocks to conduct cut grafting；and studied the effects of different rootstocks on survival rate，scion growth and side branch germination of grafted watermelon．The results showed that the survival rate of cucurbit rootstock grafting was higher than that of pumpkin rootstocks，reaching over 90% averagely．The higher survival rate of pumpkin rootstock‘ Dongfangmingzhu’was 92.81%．Using cucurbit rootstock‘ Ligen’and pumpkin rootstock ‘Dongfangmingzhu’ had significant influence on scion growth．Their scion plant height，stem diameter，number of leaves，dry and fresh weight，Chlorophyll （a+b）and carotenoid contents and root activity were significantly higher than that of the control groups of ‘Qianggen’ and ‘Jingxinzhen No.2’．Among the cucurbit rootstock varieties，‘ZM-1’ and ‘Ligen’ had smaller leaves and shorter petioles of the side branch，while the side branch of pumpkin rootstock ‘Dongfangmingzhu’ and ‘Jingxinzhen No.4’grew more slowly．The comprehensive evaluation deemed that using cucurbit rootstock ‘Ligen’ and pumpkin rootstock ‘Dongfangmingzhu’ for watermelon grafting could achieve a high survival rate，promote scion growth，and decrease the side branch germination．Therefore，they could be selected as proper reference rootstocks for grafting cultivation of watermelon．
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Received: 27 August 2019
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