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研究了20个大麦、小麦和小黑麦的典型品种,旨在确定:(1)在温室中用盐液栽培作物时,简便地测定作物的生长性状可否反映其已知的耐盐性;(2)作物(通常为大麦)的生长发育速率是否与其耐盐性有关;(3)评价了几种耐盐性的选择途径。麦类作物整株叶面积的发育速率与其生物量高度相关,且多与文献记载的品种耐盐性级度相关。然而品种的整株叶面积发育速率的试验及回归分析均无整株叶面积发育速率与其耐盐性有关的证据。耐盐性来自两方面:1.生理耐盐性一受盐分影响,植株生长发育略受抑致;2.绝对耐盐性—即在有无盐分影响下,品种自身均有较高的生长速率。苗期叶面积较大是绝对耐盐性高的最好标志。回归分析表明,在盐渍条件下,绝对耐盐性在生产上的贡献大于生理耐盐性。另有一套实验中,生理耐盐性也未反映出它与生产性能相关。经盐液处理的前10天中,象单个叶片发育速率一样,叶片中Cl~-浓度也不能做为生产性能的理想指标。因而作者提出了与常规观念不同的见解;即在筛选耐盐作物时,应选择具有内在的高生长速率且具有生理耐盐性品种,这里应特别强调的是具有内在高生长速率这一性状。
A typical variety of 20 barley, wheat and triticale was studied to determine: (1) a simple determination of the crop’s growth traits to reflect its known salt tolerance when cultivated with salt in a greenhouse; ( 2) Whether or not the rate of growth and development of crops (usually barley) is related to their salt tolerance; (3) Several salt-tolerant alternative pathways were evaluated. The developmental rate of whole plant leaf area of wheat crops is highly correlated with its biomass, and is more related to the degree of salt tolerance of the cultivars recorded in the literature. However, no significant correlation was found between the rate of leaf area development and the salt tolerance of the whole plant. Salt tolerance comes from two aspects: 1. Physiological salt tolerance is affected by salt, plant growth and development slightly inhibited; 2. Absolute salt tolerance - with or without the influence of salt, the varieties have their own higher growth rate . Larger seedling leaf area is the best sign of absolute salt tolerance. Regression analysis showed that under salinity conditions, the contribution of absolute salt tolerance in production was greater than that of physiological salt tolerance. Another set of experiments, the physiological salt tolerance nor does it reflect its performance-related. In the first 10 days of salt solution treatment, the Cl ~ - concentration in leaves was not an ideal indicator of production performance, just like the rate of single leaf development. The authors therefore put forward a different opinion than the conventional notion; that in selecting salt-tolerant crops, a species with an inherently high growth rate and physiological salt tolerance should be selected, with particular emphasis on the inherently high growth rate of this trait.