Sulfur source effects on soil, vegetation indices, biomass, and uptake in potato

IF 1.3 Q3 AGRONOMY
Ayush K. Sharma, Amanpreet Kaur Sandhu, Simranpreet Kaur Sidhu, Simon Riley, Winniefred Griffin, Diego Arruda Huggins de Sa Leitão, Lincoln Zotarelli, Lakesh K. Sharma
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Abstract

Sulfur (S) is necessary for amino acid production, disease resistance, protein synthesis, and nitrogen assimilation in plants. We tested the performance of three S sources (magnesium sulfate [EPTOP], gypsum, and ammonium sulfate [AS]) at two different rates (45 and 90 kg S ha−1) on soil S availability, vegetative indices (VIs), above- and belowground biomass (BGB), and potato (Solanum tuberosum L.) S uptake. For VIs such as normalized difference vegetative index, normalized difference red-edge index, and chlorophyll content, the maximum values were reported when gypsum and EPTOP were applied compared to AS. These differences were decreased later in the season. Significant interaction effects were reported among sites, sampling events, and sites and S sources for aboveground biomass (AGB). Similar trends were reported for the BGB, where the significant interaction effect was reported among the S sources and sampling event and S sources and sites. The AGB S uptake was affected due to the sites and sampling event. However, BGB S uptake was influenced by the interactive effect of S sources, sites, and sampling events. The VIs did not have a significant association between soil S concentration and AGB S uptake. It was found that the field history had a notable effect on the crop responses to variable S sources. In conclusion, applying S rates and sources has distinct responses, which depend on soil history and chemical properties, and that should be considered when making choices for S application in potatoes.

Abstract Image

硫源对土壤、植被指数、生物量和马铃薯吸收的影响
硫(S)是植物产生氨基酸、抗病、合成蛋白质和进行氮同化所必需的。我们测试了三种硫源(硫酸镁[EPTOP]、石膏和硫酸铵[AS])以两种不同比例(45 和 90 kg S ha-1)对土壤中硫的可用性、植被指数(VIs)、地上和地下生物量(BGB)以及马铃薯(Solanum tuberosum L.)对硫的吸收的影响。就植被指数(如归一化差异植被指数、归一化差异红边指数和叶绿素含量)而言,与 AS 相比,施用石膏和 EPTOP 时的植被指数值最大。这些差异在季节后期有所减小。在地上生物量(AGB)方面,地点、取样事件以及地点和 S 来源之间存在显著的交互效应。BGB 也有类似的趋势,在 S 来源和取样事件以及 S 来源和地点之间存在显著的交互效应。取样地点和取样事件影响了 AGB 对 S 的吸收。但是,BGB 的 S 吸收量受到 S 来源、地点和采样事件交互效应的影响。VIs与土壤S浓度和AGB S吸收量之间的关系并不明显。研究发现,田间历史对作物对不同 S 源的反应有显著影响。总之,施用 S 的速率和来源会产生不同的反应,这些反应取决于土壤历史和化学特性,在选择马铃薯施用 S 时应考虑到这一点。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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