论文部分内容阅读
以矮抗58和淮麦30为试验材料,研究了冻害胁迫下防冻剂对不同抗寒性小麦品种生理特征和产量及其构成因素的影响。冻害胁迫下,防冻剂处理显著提高了矮抗58和淮麦30叶绿素和游离脯氨酸含量,增加了SOD活性,降低了MDA含量,增强了根系活力,提高了两品种的抗寒能力。防冻剂对淮麦30抗寒性的提高效果更明显。相关性分析结果表明,小麦各生理指标的变化联系紧密,叶绿素含量、脯氨酸含量、SOD活性以及根系活力与植株抗寒能力密切相关。同时,矮抗58和淮麦30的成穗数、千粒质量和地上部分生物量均较对照显著增加,进而提高了小麦的产量和收获指数。相关分析表明,小麦产量与成穗数和穗粒数显著正相关。因此,在冻害胁迫下,喷施防冻剂来提高小麦抗寒性并保持小麦成穗数和穗粒数的稳定对小麦的稳产增产意义重大。
The effects of freeze-thaw inhibitor on physiological characteristics, yield and its components of different cold-resistant wheat cultivars were studied under the conditions of Dian 58 and Huai-30. Under freezing stress, the antifreeze treatment significantly increased the contents of chlorophyll and free proline, increased SOD activity, decreased MDA content, increased root activity and increased cold tolerance of two varieties. Antifreeze on the 30 to improve the cold hardiness of the effect is more pronounced. Correlation analysis showed that the changes of physiological indexes of wheat were closely related to each other. Chlorophyll content, proline content, SOD activity and root vigor were closely related to plant cold tolerance. At the same time, the number of spikes, thousand kernels and aboveground biomass of short resistant 58 and huaimai 30 significantly increased compared with the control, which further increased the yield and harvest index of wheat. Correlation analysis showed that there was a significant positive correlation between wheat yield and spike number and spike number. Therefore, under freeze-thaw stress, applying antifreeze to improve the cold resistance of wheat and keep the number of spikelets and the number of grains per spike were of great significance to the stable yield increase of wheat.