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为探明碱胁迫对高粱不同品种生理生化及产量的影响,笔者运用以品种为主区,碱浓度为副区的裂区设计法对其进行了研究。结果表明:碱胁迫提高了高粱的超氧化物歧化酶(SOD)、过氧化物酶(POD)的活性以及游离脯氨酸(Pro)和丙二醛(MDA)的含量,在碱浓度20~40 mmol/L范围内,随着碱胁迫浓度的增加SOD、POD、Pro及MDA都在增加;随生育期的推进,SOD、POD、MDA增加,而Pro则降低,但‘纽S×7’品种增加的幅度不明显,而‘13H2842’品种增加的幅度较明显;不同品种的光合速率均随着碱浓度的增加而降低,由此导致产量构成因素呈现出相似的变化趋势,最终形成了不同的产量。所以,在盐碱地上种植高粱,应选择对碱不敏感的品种,这样才有利于稳产和高产。
In order to find out the effect of alkali stress on the physiological, biochemical and yield of different sorghum varieties, the author studied the split-zone design method which takes the variety as the main area and the alkali concentration as the sub-area. The results showed that alkali stress increased the activities of superoxide dismutase (SOD) and peroxidase (POD) and the contents of free proline (Pro) and malondialdehyde (MDA) In the range of 40 mmol / L, the contents of SOD, POD, Pro and MDA increased with the increase of alkali stress concentration. The SOD, POD and MDA increased, The increase range of ’13H2842’ was more obvious. The photosynthetic rate of different cultivars decreased with the increase of alkali concentration, which led to similar trend of yield components and eventually formed different Production. Therefore, the planting of sorghum in saline-alkali soil, alkali-insensitive varieties should be selected, so that it is conducive to stable and high yield.