Škarpa Petr, Antošovský Jiří, Ryant Pavel, Hammerschmiedt Tereza, Kintl Antonín, Brtnický Martin
Department of Agrochemistry, Soil Science, Microbiology and Plant Nutrition, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic.
Agricultural Research, Ltd., Zahradní 400/1, 664 41 Troubsko, Czech Republic.
Plants (Basel). 2021 Oct 15;10(10):2188. doi: 10.3390/plants10102188.
In Europe, mainly due to industrial desulfurization, the supply of soil sulfur (S), an essential nutrient for crops, has been declining. One of the currently promoted sources of renewable energy is biogas production, which produces S as a waste product. In order to confirm the effect of the foliar application of waste elemental S in combination with liquid urea ammonium nitrate (UAN) fertilizer, a vegetation experiment was conducted with maize as the main crop grown for biogas production. The following treatments were included in the experiment: 1. Control (no fertilization), 2. UAN, 3. UANS1 (N:S ratio, 2:1), 4. UANS2 (1:1), 5. UANS3 (1:2). The application of UAN increased the N content in the plant and significantly affected the chlorophyll content (N-tester value). Despite the lower increase in nitrogen (N) content and uptake by the plant due to the application of UANS, these combinations had a significant effect on the quantum yield of PSII. The application of UANS significantly increased the S content of the plant. The increase in the weight of plants found on the treatment fertilized with UANS can be explained by the synergistic relationship between N and S, which contributed to the increase in crop nitrogen use efficiency. This study suggests that the foliar application of waste elemental S in combination with UAN at a 1:1 ratio could be an effective way to optimize the nutritional status of maize while reducing mineral fertilizer consumption.
在欧洲,主要由于工业脱硫,土壤中硫(S)这一作物必需养分的供应一直在下降。目前推广的可再生能源之一是沼气生产,其会产生硫作为废弃物。为了证实叶面喷施废弃单质硫与液体尿素硝酸铵(UAN)肥料相结合的效果,以用于沼气生产的主要作物玉米开展了一项植被实验。实验包括以下处理:1. 对照(不施肥),2. UAN,3. UANS1(氮:硫比例为2:1),4. UANS2(1:1),5. UANS3(1:2)。施用UAN增加了植株中的氮含量,并显著影响叶绿素含量(N-测试仪值)。尽管由于施用UANS,植株中氮含量和吸收量的增加幅度较小,但这些组合对PSII的量子产率有显著影响。施用UANS显著增加了植株中的硫含量。在施用UANS的处理中发现的植株重量增加可以通过氮和硫之间的协同关系来解释,这有助于提高作物氮素利用效率。本研究表明,以1:1的比例叶面喷施废弃单质硫与UAN相结合可能是优化玉米营养状况同时减少矿物肥料消耗的有效方法。