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Sulfur management strategies to improve partial sulfur balance with irrigated peanut production on deep sands
Archives of Agronomy and Soil Science ( IF 2.4 ) Pub Date : 2020-08-13 , DOI: 10.1080/03650340.2020.1798412
Thi Thai Hoa Hoang 1 , Dinh Thuc Do 1 , Huu Ngu Nguyen 1 , Van Binh Nguyen 1 , Surender Mann 2 , Richard W. Bell 2
Affiliation  

ABSTRACT

Sands have favourable physical properties for harvesting peanut, but improving S and water use efficiency on these soils remains a challenge. We studied partial S balance in irrigated peanut crops on sands of Central Vietnam to identify key factors of S fertiliser management affecting S inputs and outputs. Field trials were conducted in the spring seasons of 2015 and 2016 to determine the effects of S application rates (0, 15, 30, 45 kg ha−1) on peanut yield and partial S balance. Sulfur balances were negative (−28.3 to 5.6 kg S ha−1) at rates < 30 kg S ha−1, while at higher rates of S fertiliser application that produced maximum pod yield (30–45 kg S ha−1), three of four sites showed neutral to slightly positive S balance (1.5–5.6 kg S ha−1). The negative partial S balance decreased with increasing S rates but was mostly attributable to the large S removal in peanut shoots (9.7–22.3 kg S ha−1) which are used on farms for animal feed. The negative partial S balance results in depletion of soil S reserves and hence efficient recycling of S on farms is critical for sustainable crop production on sands of VN.



中文翻译:

改善深沙灌溉花生生产中部分硫平衡的硫管理策略

摘要

沙子有利于收获花生的物理特性,但提高这些土壤的硫和水分利用效率仍然是一个挑战。我们研究了越南中部沙地上灌溉花生作物的部分硫平衡,以确定影响硫输入和输出的硫肥管理的关键因素。田间试验在 2015 年和 2016 年春季进行,以确定施硫量(0、15、30、45 kg ha -1)对花生产量和部分硫平衡的影响。硫平衡为负值(-28.3 至 5.6 kg S ha -1),比率 < 30 kg S ha -1,而在产生最大豆荚产量(30-45 kg S ha -1),四个站点中的三个显示出中性到略正的 S 平衡(1.5-5.6 kg S ha -1)。负部分 S 平衡随着 S 率的增加而降低,但主要归因于农场用于动物饲料的花生芽(9.7-22.3 kg S ha -1)中的大量 S 去除。负的部分 S 平衡导致土壤 S 储备枯竭,因此农场中 S 的有效回收对于 VN 沙地上的可持续作物生产至关重要。

更新日期:2020-08-13
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