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Impact of sulfur application on soybean yield and quality in New York
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-04-16 , DOI: 10.1002/agj2.20690
Jodi L. Letham 1, 2 , Quirine M. Ketterings 1 , Jerry H. Cherney 3 , Thomas R. Overton 4
Affiliation  

Sulfur (S) fertilizer is not widely used for soybean [Glycine max (L.) Merr.] production in the northeastern United States but decreased atmospheric S deposition rates warrant evaluation of S needs for soybean in the region. The objective of this study was to determine the impact of S fertilizers [CaSO4 and (NH4)2SO4 at 168 kg S ha–1] on soybean grain yield, crude protein (CP), S content, N/S ratio, and crop S balances. Thirteen on-farm trials were conducted in New York in 2017–2019 using a randomized complete block design in three to six replications. Tissue analysis at early bloom and full maturity did not suggest an S limitation; N/S ratios were between 14:1 and 18:1 and tissue S at early bloom ranged from 3.10 to 4.36 g kg–1. These findings were consistent with the lack of increase in grain yield with S addition, independent of S source. Addition of S did not change seed CP or S concentration although, averaged across trials, the whole plant S content at maturity was slightly higher when S had been applied. Negative partial balances (crop removal – S deposition) showed considerable soil contribution to S uptake. Soil organic matter (SOM), however, was not a good indicator of soil S supply. Due to lack of a response to S, critical soil test S levels could not be determined. We conclude S is not limiting soybean grain yield currently. Continued monitoring is needed as partial balances suggest S may become deficient over time.

中文翻译:

施硫对纽约大豆产量和品质的影响

在美国东北部,硫 (S) 肥料并未广泛用于大豆 [ Glycine max (L.) Merr.] 生产,但大气中硫沉积率降低,需要对该地区大豆的硫需求进行评估。本研究的目的是确定硫肥的影响 [CaSO 4和 (NH 4 ) 2 SO 4在 168 kg S ha –1] 对大豆籽粒产量、粗蛋白 (CP)、S 含量、N/S 比和作物 S 平衡的影响。2017-2019 年在纽约进行了 13 项农场试验,采用随机完整区组设计,重复三到六次。早花和完全成熟时的组织分析未表明 S 限制;N/S 比率在 14:1 和 18:1 之间,早花时组织 S 范围从 3.10 到 4.36 g kg –1. 这些发现与 S 添加后谷物产量没有增加一致,与 S 源无关。添加 S 不会改变种子 CP 或 S 浓度,尽管在整个试验中平均而言,当施用 S 时,成熟时的整株 S 含量略高。负部分平衡(作物去除 - S 沉积)显示土壤对 S 吸收的贡献相当大。然而,土壤有机质 (SOM) 并不是土壤 S 供应的良好指标。由于缺乏对 S 的响应,无法确定临界土壤测试 S 水平。我们得出结论,S 目前并未限制大豆籽粒产量。需要持续监测,因为部分余额表明 S 可能会随着时间的推移而变得不足。
更新日期:2021-04-16
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