期刊
ARCHIVES OF AGRONOMY AND SOIL SCIENCE
卷 67, 期 11, 页码 1465-1478出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03650340.2020.1798412
关键词
Deep sands; Haplic Arenosols; leaching; sulfur fertiliser; sulfur budget
资金
- Australian Centre for International Agricultural Research [SMCN/2012/069]
Improving sulfur and water use efficiency for peanut cultivation on sandy soils remains a challenge. By studying partial sulfur balance in irrigated peanut crops in Central Vietnam, it was found that sulfur application rates of 30-45 kg S ha(-1) showed positive sulfur balance and maximum pod yield.
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.
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