Effect of vermicompost tea on rooibos (Aspalathus linearis) growth and rhizosphere microbial diversity under field conditions
Effect of vermicompost tea on rooibos (Aspalathus linearis) growth and rhizosphere microbial diversity under field conditions
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DOI：
10.1080/02571862.2019.1650206
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发表时间：
2020-03-25
影响因子：
0.9
通讯作者：
Hardie, Ailsa G.
中科院分区：
文献类型：
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作者：
van Heerden, Stefanus G.;Hardie, Ailsa G.
对路易波士茶（Aspalathus linearis）日益增长的需求要求生产商以可持续的方式增加产量。本研究的目的是研究在Nieuwoudtville地区田间条件下施用蚯蚓堆肥茶（VCT）（100和500 L公顷（-1）月）和自来水对1年生路易波士树养分吸收、茶叶产量和根际微生物多样性的影响。与相同体积的自来水相比，VCT溶液的应用对路易波士存活率或茶叶产量没有显着影响。使用含或不含VCT的自来水导致植物存活率显著增加（高出23-31%），导致茶叶产量降低（降低38-66%），可能是由于植物竞争加剧。由于VCT中的有机酸，使用5倍于供应商推荐量(500 L ha（-1) month(-1)）的VCT水幕显著提高了叶面P和Fe，减少了叶面Al。100 L ha-1的VCT处理显著提高了细菌种类多样性，降低了优势度。需要进一步的研究来确定添加蚯蚓堆肥茶会增加哪些细菌种类。施用矿质氮含量较高的堆肥茶可能更有利于提高产量。
Increasing demand for rooibos tea (Aspalathus linearis) requires producers to increase production in a sustainable manner. The aim of the study was to examine the effect of applying vermicompost tea (VCT) (100 and 500 L ha(-1) month(-1)) and tap water drenches on one-year old rooibos nutrient uptake, and tea yields and rhizosphere microbial diversity under field conditions in the Nieuwoudtville region. The application of VCT solutions had no significant effect on rooibos survival or tea yields compared to the same volume of tap water. The application of tap water with or without VCT resulted in significant increases in plant survival (23-31% higher), resulting in lower tea yields (38-66% lower) likely due to increased plant competition. The application of VCT drench applied at 5 times the supplier's recommendations (500 L ha(-1) month(-1)) significantly enhanced foliar P and Fe and reduced foliar Al, attributed to the organic acids in VCT. VCT application at 100 L ha-1 significantly enhanced bacterial species diversity and decreased dominance. Further research is needed to identify which bacterial species are increasing with addition of vermicompost tea. Application of compost tea with higher mineral N content would likely be more beneficial for enhancing yields.