植物生长延缓剂对西瓜砧木和嫁接苗质量的影响

为了建立西瓜嫁接苗徒长控制技术,培育优质西瓜嫁接苗,以西瓜接穗品种早佳84-24,葫芦砧木品种强根为试材,研究了多效唑、比久、矮壮素、宇花灵3号等4种植物生长延缓剂不同浓度处理对砧木及西瓜嫁接苗生物学性状和叶片叶绿素含量的影响,并采用隶属函数法综合评价喷施生长延缓剂对西瓜砧木幼苗和嫁接苗质量的影响。结果表明,4种植物生长延缓剂不同浓度处理对西瓜砧木幼苗和西瓜嫁接苗生物学性状的影响差异较大。采用隶属函数法综合评价砧木幼苗和西瓜嫁接苗质量,发现30mg·L-1和50mg·L-1多效唑处理的砧木幼苗和西瓜嫁接苗隶属函数值均较高,砧木幼苗和西瓜嫁接苗叶片叶绿素含量也较高。由此可见,30~50mg·L-1多效唑处理可有效提高西瓜砧木质量,并改善西瓜嫁接苗质量。

Effects of Plant Growth Retardant on Quality of Rootstock and Grafted Watermelon Seedlings

In order to establish a technique to control the growth of grafted watermelon seedlings and to cultivate robust grafted watermelon seedlings，this paper took‘ Zaojia 84-24’ watermelon and bottle gourd rootstock‘ Qianggen’ as material，studied the effects of 12 treatments by different concentrations of 4 plant growth retardants as PP333，B9，CCC，Yuhualing No.3 on the biological characters and chlorophyll contents of rootstock and grafted watermelon seedlings； and comprehensively evaluated the effects of spraying plant growth retardant on the quality of rootstock and grafted watermelon seedling by the method of membership function. The results indicated that there were significantly different effects on biological characters of rootstock and grafted watermelon seedlings by different treatments. Using method of membership function，we found seedlings treated with 30 mg·L^-1 and 50 mg·L^-1 PP333 had higher quality and higher chlorophyll contents in rootstock and grafted watermelon seedlings. This suggested that spraying PP333 at 30 mg·L^-1 to 50 mg·L^-1 could effectively improve the quality of both rootstock and grafted watermelon seedlings.