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首页> 外文期刊>Tropical Science >The influence of drought stress on yield of tef (Eragrostis tef).
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The influence of drought stress on yield of tef (Eragrostis tef).

机译：干旱胁迫对特夫（Eragrostis tef）产量的影响。

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摘要

Six tef genotypes of different drought response were subjected to three moisture stress treatments (early stress, terminal stress and well watered) in a field study on sandy clay loam soil in Ethiopia in the 1995/96 off season. Grain and biomass yields were significantly reduced by the early and terminal stress treatments with the effect being greater in the former. In both treatments grain yield was highest in DZ-Cr-37, DZ-01-1015 and DZ-Cr-358 and lowest in Trotteriana. Drought sensitivity (DS) was greater for early than for terminal stress and it was significantly different among the cultivars. Harvest index was more severely affected by terminal than early stress, and the variation among the genotypes did not follow the order of the drought response. All yield components were significantly reduced by early stress, except 100-seed weight, which was severely reduced by the terminal stress only. DS was negatively and significantly correlated with both grain and biomass yields in early and terminal stress, and with all yield components except 100-seed weight in early stress. None of the yield components was significantly associated with DS under terminal stress.
机译：在1995/96淡季，对埃塞俄比亚沙质壤土进行了田间研究，对六种不同干旱响应的特氟基因型进行了三种水分胁迫处理（早期胁迫，终末胁迫和浇水良好）。早期和末期胁迫处理显着降低了谷物和生物量的产量，前者的影响更大。在这两种处理中，DZ-Cr-37，DZ-01-1015和DZ-Cr-358的谷物产量最高，而Trotteriana的谷物产量最低。早期的干旱敏感性（DS）大于终端胁迫，并且在不同品种之间差异显着。收割指数受末端的影响要比早期胁迫更为严重，并且基因型之间的变化没有遵循干旱响应的顺序。除100粒重外，所有产量成分均因早期胁迫而显着降低，而100粒重仅因末端胁迫而严重降低。在早期和末期胁迫中，DS与谷物和生物量的产量均呈负相关，且与早期胁迫中除100粒重以外的所有产量成分均呈负相关。在终端应力下，没有任何屈服分量与DS显着相关。

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