Effect of Compound Biochar Substrate on the Root Growth of Cucumber Plug Seedlings
Effect of Compound Biochar Substrate on the Root Growth of Cucumber Plug Seedlings
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DOI：
10.3390/agronomy10081080
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发表时间：
2020-08-01
期刊：
影响因子：
3.7
通讯作者：
Gao, Feng
中科院分区：
文献类型：
--
作者：
Ma, Guoxin;Mao, Hanping;Gao, Feng
鉴于穴盘苗在自动移栽中的关键作用，本研究旨在探讨生物炭对穴盘苗根系生长的影响。理化性能测试表明，在泥炭中添加生物炭可以提高基质的孔隙度、pH值和电导率，其中0%、10%、20%和30%的生物炭处理的基质均能满足育苗要求。基质的保水性能随生物炭比例的增加而提高，氮素释放量随生物炭比例的增加而显著降低。结果表明，10%生物炭处理的基质对幼苗和根系的生长有明显的促进作用，甚至对根尖细胞的长度有明显的促进作用。然而，40%和50%生物炭处理的基质对幼苗和根系的生长有明显的抑制作用。实验结果表明，添加适当比例的生物炭可以提高基材的强度。在强大的根系和固体基质的相互作用下，20%和10%生物炭处理的基质抗压强度明显好于其他处理，尤其是40%和50%生物炭处理的基质抗压强度更好，有效地满足了自动采苗的要求。生物炭在育苗中有很好的应用前景。
Since plug seedling plays a key role in automatic transplanting, this work aimed to explore the effect biochar has on the root growth of plug seedlings. The physicochemical properties tests showed that the addition of biochar in the peats could increase the porosity, pH, and EC values of the substrate, and the substrates treated with 0%, 10%, 20%, and 30% biochar could meet the requirements of seedling raising. The water retention of the substrate was superior with the increase of biochar proportion, and the nitrogen release significantly decreased with the increase of the biochar proportion. Our results demonstrated that the substrate with 10% biochar-treated apparently promoted the growth of seedlings and root systems, even the length of the root-tip cells. However, the substrates with 40% and 50% biochar-treated obviously inhibited the growth of seedlings and root systems. It was noticed that the strength of substrate with appropriate biochar proportion was enhanced, as well. Under the interaction of strong root system and solid substrate, the compressive strength of the substrate with 20% and 10% biochar-treated was much better than others, especially that of 40% and 50% biochar-treated, which efficiently satisfied the requirements of automatic seedling picking. The biochar may have a good application prospect in seedling raising.