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首页> 外文期刊>Horticultura Brasileira >Crescimento de mudas de tomateiro em substratos contendo hidrogel nanocompósito com montmorilonita de cálcio (NC-MMt)
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Crescimento de mudas de tomateiro em substratos contendo hidrogel nanocompósito com montmorilonita de cálcio (NC-MMt)

机译：含蒙脱土钙纳米复合水凝胶的基质上番茄幼苗的生长

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The correct use of hydrogels in some situations can increase seedling survival rates, plant growth, and the water-retention capacity of the growing medium. A technique for the production of a nanocomposite hydrogel using calcium montmorillonite (NC-MMt) was recently developed. However, additional research is necessary in order to validate this innovative input, particularly for the production of vegetable crops seedlings. In this context, the main objective of the present study was to evaluate the growth and development of seedlings, tomato hybrid ‘BRS Nagai’, in substrates containing different amendments of hydrogel NC-MMt. The trial was conducted in a 3x3 factorial arranged in a complete randomized blocks design, with three replications. Three substrates (peat moss, pine bark, and coconut peat) corresponded to the first factor and three rates of the NC-MMt hydrogel (0%= R1, 1.5%= R2 and 2.0%= R3, on a w/w basis) corresponded to the second factor. Each plot was composed of 16 plants that were assessed after three weeks. Overall, peat moss-based and pine bark-based substrates resulted in higher values for most of the analyzed traits: plant emergency percentage, plant height, stem diameter, leaf area, plant height/shoot dry weight ratio, root dry weight, shoot dry weight/root dry weight ratio and the Dickinson Quality Index. Rates of NC-MMt hydrogel displayed significant responses only to root superficial area and root volume. NC-MMt hydrogel amendment (mainly 1.5%) combined with specific substrates (mainly peat moss-based substrate) was able to improve the growth of ‘BRS Nagai’ tomato seedlings, with no observed toxic effects.
机译：在某些情况下正确使用水凝胶可以提高幼苗成活率，植物生长和生长介质的保水能力。最近开发了使用钙蒙脱石（NC-MMt）生产纳米复合水凝胶的技术。然而，为了验证这一创新性投入，还需要进行更多的研究，尤其是对于蔬菜作物幼苗的生产。在这种情况下，本研究的主要目的是评估在含有不同修饰的水凝胶NC-MMt的基质中番茄杂交杂种'BRS Nagai'的生长和发育。该试验以3x3阶乘进行，按完整的随机区组设计安排，重复3次。三种底物（青苔，松树皮和椰子泥炭）与第一个因子相对应，并且NC-MMt水凝胶的三种比率（以w / w为基准分别为0％= R1、1.5％= R2和2.0％= R3）第二个因素。每个样地由16个植物组成，三周后进行评估。总体而言，基于泥炭苔藓和基于松树皮的底物对大多数分析的性状均具有较高的价值：植物紧急情况百分比，植物高度，茎直径，叶面积，植物高度/枝干重量比，根干重，枝干重量/根干重比和狄金森品质指数。 NC-MMt水凝胶的速率仅对根表浅面积和根体积显示出显着响应。 NC-MMt水凝胶改良剂（主要为1.5％）与特定的基质（主要是基于泥炭藓的基质）相结合能够改善'BRS Nagai'番茄幼苗的生长，而没有观察到毒性作用。

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