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为明确嫁接是否可以提高棉花对NaCl的耐性,首先对11份棉花资源种子萌发期和苗期的耐盐性进行了鉴定,并采用隶属函数法对其耐盐性进行评价,发现源于我国西南地区的多年生海岛棉113-5的耐盐性最强,而产量较高的陆地棉栽培品种(转Bt抗虫棉)J-1的耐盐性最弱;然后,以113-5和J-1为材料进行互相嫁接,并以自根苗为对照,结果发现其耐盐性强弱顺序表现为:自根苗113-5>嫁接株J-1/113-5(接穗/砧木)>反接株113-5/J-1>J-1自根苗。结果表明,在生产中直接利用耐盐性强的材料作砧木,采用嫁接栽培法可显著提高接穗的耐盐性。
To clarify whether grafting can improve cotton tolerance to NaCl, the salt tolerance of 11 cotton seed germination and seedling stages was identified and its salinity tolerance was evaluated by membership function method. The perennial island cotton 113-5 had the strongest salt tolerance and the weaker salt tolerance of high-yielding G. hirsutum cultivars (transgenic Bt cotton) J-1; and then, 113-5 and J- 1 as a material for grafting and rooting as a control, the results showed that the salt resistance of the order showed as follows: self-root seedlings 113-5> grafted J-1 / 113-5 (scion / rootstock)> reverse 113-5 / J-1> J-1 Self root seedlings. The results showed that the direct use of salt-tolerant materials in the production of rootstocks, grafting cultivation can significantly improve the scion salt tolerance.