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首页> 外文OA文献 >The effect of compost and priming on the salt tolerance of bread wheat (Triticum aestivum L. cv. S-24 and cv. Slambo) during germination and early seedling establishment
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The effect of compost and priming on the salt tolerance of bread wheat (Triticum aestivum L. cv. S-24 and cv. Slambo) during germination and early seedling establishment

机译：堆肥和引发对面包小麦（Triticum aestivum L. cv。S-24和cv。Slambo）萌发和幼苗早期耐盐性的影响

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摘要

Soil salinity and the arid climate in Libya are major constraints in agriculture and predominantly in foodstuff production which are limiting wheat production and yield. The effect of pre-sowing seed treatments with 50 mM of KCl, NaCl, CaCl2, and distilled water as hydropriming on germination and early seedling growth in two wheat (Triticum aestivum L.) cultivars S-24 (tolerant) and Slambo (untested before) under 0, 100, 200 and 300 mM NaCl concentrations was examined. CaCl2 was the only priming treatment that significantly improved the germination percentage, germination rate, and mean germination time in both cultivars under almost all NaCl concentrations. Thus, priming with CaCl2 was selected for further experiments. In the greenhouse, seeds primed with 50 mM of CaCl2 also improved the emergence percentage, emergence rate, shoot and root length, and fresh and dry weight of shoots and roots of both cultivars under all NaCl concentration except at 300 mM where the emergence was completely inhibited. The response of wheat cultivars to three compost treatments including cow manure compost (CC), greenwaste compost (GC) and 50:50 mixture (mix) between them and sand at percentage inclusions of 10 and 30 % by weight under 0, 100, 200, and 300 mM of NaCl was also investigated. Among all compost treatments, 30% GC and 30% mix were the best treatment and improved almost all growth parameters under salt stress, and 30% GC was also the only treatment that had any emergence at 300 mM NaCl. 30% GC and 30% mix were selected for further experiments. The effect of the combination of the selected priming agent (CaCl2) and the best two compost treatments (30% GC and 30% mix) on the emergence and early seedling growth of both cultivars was tested. The results showed that all the treatments enhanced plant growth parameters including seedling ion uptake in both cultivars, with preference to primed seeds sown in 30% GC. The treatments had the following order of the performance of both cultivars under salt stress. Primed seeds sown in 30% GC > unprimed seeds sown in 30% GC > primed seeds sown in 30% mix > unprimed seeds sown in 30% mix. This enhancement is possibly due to the provision of Ca2+ and / or the improvement in the availability of water as both of them were improved by the application of priming and compost.
机译：利比亚的土壤盐分和干旱气候是农业的主要限制因素，主要是粮食生产，这限制了小麦的产量和单产。用50 mM的KCl，NaCl，CaCl2和蒸馏水对土壤进行预播处理对两种小麦（Stictic aestivum L.）（S-24）（耐性）和Slambo（未经试验）的发芽和幼苗早期生长的影响在0、100、200和300 mM NaCl浓度下进行了检测。 CaCl2是唯一能在几乎所有NaCl浓度下显着改善两个品种发芽率，发芽率和平均发芽时间的引发处理。因此，选择用CaCl2引发进行进一步的实验。在温室中，在所有NaCl浓度下，用300 mM的CaCl2引发的种子还改善了两个品种在所有NaCl浓度下的出苗率，出苗率，枝条和根长，以及茎和根的鲜重和干重，但完全出苗的300 mM除外。被抑制。小麦品种对三种堆肥处理的响应，包括牛粪堆肥（CC），绿色废物堆肥（GC）以及它们与沙子之间的50:50混合比（混合），其中夹杂物含量分别为0、100、200、10和30％（重量） ，并且还研究了300 mM的NaCl。在所有堆肥处理中，最佳的处理方法是30％GC和30％混合，并改善盐胁迫下的几乎所有生长参数，而30％GC也是唯一在300 mM NaCl中出现的处理。选择30％GC和30％混合液用于进一步的实验。测试了选择的引发剂（CaCl2）和最佳的两种堆肥处理（30％GC和30％混合）的组合对两个品种出苗和早期幼苗生长的影响。结果表明，所有处理均提高了两个品种的植物生长参数，包括幼苗对离子的吸收，优选在30％GC中播种的发芽种子。在盐胁迫下，两个品种的处理顺序如下。在30％GC中播种的底漆种子>在30％GC中播种的未底漆种子>在30％混合物中播种的底漆种子>在30％混合物中播种的未底漆种子。这种增强可能是由于提供了Ca2 +和/或改善了水的可利用性，因为两者都通过施加底漆和堆肥而得到了改善。

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    Gadeh H.M.;

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  • 年度 2013
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