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采用水培的方法,在200 mmol/L Na Cl胁迫条件下对23个不同种的67份柱花草(Stylosanthes Sw.)进行耐盐性评价。盐处理15 d后对枯叶率(WLR)、相对生长量(RG)、叶绿素(Chl)含量和相对含水量(RWC)进行测定。结果表明:柱花草不同种及同一种的不同材料间耐盐能力存在显著差异;相关分析表明,WLR与Chl含量、RG及RWC呈显著负相关,相关系数分别为0.87、0.78及0.59,而FW与Chl含量呈显著正相关,相关系数达0.72。主成分分析得到2个主成分,可以解释总变化的89.83%。隶属函数法耐盐能力排序及聚类分析表明,直立柱花草CIAT11900、马弓形柱花草Fine stem、有钩柱花草CIAT1010、灌木黏质柱花草CIAT11052、弱脉柱花草CIAT11927和有钩柱花草Verano的耐盐性最强,有望在滨海盐渍土的改良中应用。
The salt tolerance of Stylosanthes Sw. From 23 different species was evaluated under 200 mmol / L NaCl stress by hydroponics. The WLR, RG, Chl and RWC were measured 15 days after salt treatment. The results showed that there was a significant difference in salt tolerance between different species and the same materials. The correlation analysis showed that there was a significant negative correlation between WLR and Chl content, RG and RWC, the correlation coefficients were 0.87, 0.78 and 0.59, respectively. FW And Chl content was significantly positive correlation, correlation coefficient of 0.72. Principal component analysis obtained two principal components, which can explain the total change of 89.83%. Salt tolerance of the subordinate function method and clustering analysis showed that the vertical column flower CIAT11900, Malvagium column flower Fine stem, Corydalis CIAT1010, shrub Clay column CIAT11052, Weeder colonnade CIAT11927 and columnar flower Verano The most salt-tolerant, is expected to be used in the improvement of coastal saline soil.