论文部分内容阅读
采用ＮａＣｌ型盐渍土浸提液,对１９种苹果砧木进行了耐盐性测定。以相对生长量(ＲＧ)和盐害指数(ＳＩ)为指标进行聚类分析,将其划分为耐盐能力高Ｈ(３．０ｍｇ/ｇ)、中Ｍ(２．５ｍｇ/ｇ)、低Ｌ(２．０ｍｇ/ｇ)３组,其中Ｌｕｏ－２、Ｌｕｏ－１、珠眉海棠(Ｍａｌｕｓ ｚｕｍｉ Ｒｅｈｄ．)属于Ｈ组,Ｌｕｏ－２优选株系耐盐能力达３．５ｍｇ/ｇ。通过判别分析表明,以３．０ｍｇ/ｇ和３．５ｍｇ/ｇ两个盐浓度下的ＲＧ和ＳＩ值可以准确鉴定苹果砧木耐盐能力的高低,且有利于把Ｈ、Ｍ和Ｌ区分开来。ＲＧ与ＲＩ显著负相关,均可以单独作为苹果砧木耐盐能力鉴定指标。
NaCl salt type saline soil extract was used to measure the salt tolerance of 19 apple rootstocks. Based on the relative growth (RG) and salinity index (SI), the cluster analysis was conducted to classify them into high salt tolerant H (3.0mg / g), medium M (2.5mg / g) (2.0 mg / g). Among them, Luo-2, Luo-1 and Malus zumi Rehd. Belonged to group H, and the salt tolerance of Luo-2 was up to 3.5 mg / g. The results of discriminant analysis showed that the RG and SI values of 3.0mg / g and 3.5mg / g can accurately identify the salt tolerance of apple rootstocks and distinguish H, M and L . RG and RI significant negative correlation, can be used alone as apple rootstock salt tolerance identification index.