新疆精河枸杞种子耐盐特性研究

Salt Tolerance of Lycium dasystemum Pojarkova Seeds in Xinjiang Jinghe

为充分利用新疆盐渍土地并促进枸杞大面积推广栽培,以新疆精河枸杞种子为试验材料,研究其在不同浓度的NaCl和Na_(2)SO_(4)盐溶液中的发芽情况。通过不同浓度的盐胁迫处理,测定枸杞种子的发芽率、发芽势和发芽指数。结果表明,当NaCl溶液浓度在20~60 mmol·L^(-1)时发芽率、发芽势和20~40 mmol·L^(-1)时发芽指数均高于对照,但是差异不显著;NaCl溶液浓度在80~100 mmol·L^(-1)时,精河枸杞种子发芽率、发芽势、发芽指数低于对照,且除80 mmol·L^(-1)时发芽指数外均差异不显著(P>0.05);NaCl浓度达到120 mmol·L^(-1)时精河枸杞种子发芽率、发芽势和发芽指数低于对照,发芽指数存在极显著差异(P<0.01);Na_(2)SO_(4)盐溶液处理时,溶液浓度在20~120 mmol·L^(-1)范围内精河枸杞种子的发芽率、发芽势和发芽指数均低于对照;Na_(2)SO_(4)溶液浓度增加到80~120 mmol·L^(-1)时,枸杞种子的发芽率、发芽势、发芽指数均极显著低于对照,且随浓度的增加各指标逐渐下降。Na_(2)SO_(4)盐溶液对精河枸杞种子萌发的抑制强于NaCl。精河枸杞种子在萌发期间具有一定的耐盐特性,但是高浓度的盐碱会抑制精河枸杞种子的萌发。

In order to make full use of the saline land in Xinjiang and promote the large-scale cultivation of Lycium dasystemum Pojarkova, the seeds of L. dasystemum as the experimental materials to study its germination in different concentrations of NaCl and Na_(2)SO_(4)salt solution. The germination rate, germination potential and germination index of L. dasystemum seeds were measured by different concentrations of salt stress. The results showed that when the concentration of NaCl solution was 20-60 mmol·L^(-1), the germination rate and germination potential, and the germination index at 20-40 mmol·L^(-1)were higher than the control, but the difference was not significant;When the concentration of NaCl solution was 80-100 mmol·L^(-1), the germination rate, germination potential and germination index of L. dasystemum seeds were lower than those of the control, and there was no significant difference except for the germination index at 80 mmol·L^(-1)(P>0.05);When the concentration of NaCl reached 120 mmol·L^(-1), the germination rate, germination potential and germination index of L. dasystemum seeds were lower than those in the control, and the germination index was significantly different(P<0.01);When treated with Na_(2)SO_(4)salt solution, the germination rate, germination potential and germination index of L. dasystemum seeds were lower than those of the control within the concentration range of 20-120 mmol·L^(-1). When the concentration of Na_(2)SO_(4)solution increased to 80-120 mmol·L^(-1), the germination rate, germination potential and germination index of L. dasystemum seeds were significantly lower than those of the control, and the indexes gradually decreased with the increase of concentration. The inhibition of Na_(2)SO_(4)salt solution on the germination of L. dasystemum seeds was stronger than that of NaCl. L. dasystemum seeds have certain salt tolerance characteristics during germination, but high concentration of salt and alkali will inhibit the germination of L. dasystemum seeds.