【摘要】 为验证与评价2种抗旱剂在小麦上的抗旱与增产作用,试验研究了在播期干旱胁迫下,2种抗旱剂拌种对小麦田间出苗率、幼苗生理、产量以及水分利用率的影响。结果表明,2种抗旱剂拌种均有显著提高田间出苗率、穗数、穗粒数、产量以及水分利用率的功能;播后10 d,Kh-1拌种和Kh-13拌种出苗率分别比对照极显著提高40.7%和40.0%;Kh-1和Kh-13穗数比对照分别极显著提高32.27%和30.8%,穗粒数分别比对照显著提高17.70%和19.22%,产量分别比对照极显著提高59.11%和56.06%;水分利用率均比对照极显著提高了60.81%;Kh-1和Kh-13拌种处理相对电导率、叶片相对含水量、叶绿素荧光参数(Fv/Fm)3个指标均显著增强。因此,Kh-1和Kh-13拌种能显著增强小麦抗旱能力,提高旱地小麦产量和水分利用效率。更多还原

【Abstract】 To verify and evaluate the effects of two drought-resistance agents on the drought resistance and yield increase in wheat,the experiment was conducted to study the effects of drought-resistant agents on seedling emergence rates, seedling physiology, yield and water use efficiency under drought stress condition during wheat sowing period. The results showed that the two drought-resistant agents accelerated the rate of seedling emergence, and increased spikes, kernels, yield and water use efficiency significantly. Compared with CK,the drought-resistant agents of Kh-1 and Kh-13 significantly increased seedling emergence rates by 40.7% and 40.0% after sowing 10 days, respectively. Kh-1 and Kh-13 significantly increased the spikes by 32.27% and 30.8%, respectively, the kernels increased by17.70% and 19.22%, respectively, yield increased by 59.11% and 56.06%, respectively. The water use efficiency increased by 60.81%,compared with CK, respectively. The three indexes of relative electrical conductivity, leaf relative water content and the chlorophyll fluorescence parameters(Fv/Fm)were significantly increased through seed dressing Kh-1 and Kh-13. Therefore, Kh-1 and Kh-13 could strengthen drought-resistance, and improve wheat yield and water use efficiency in dryland.更多还原