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列举了硫肥在中国、印度、阿根廷和巴西的应用。大量田间试验证明,SO42-或S0微粒硫肥可显著提高农作物产量。比较了这两类硫肥的优缺点。SO42-为速效硫肥,易于被作物吸收,但容易发生淋溶损失。S0须被微生物氧化成SO42-才能被作物吸收,由于这是一个渐进的过程,所以淋溶损失很小;此外S0产品对后季作物具有良好的后效,这对双季耕作和一种或多种作物的轮作是很重要的。S0转化成易于被植物吸收的SO42-形式受土壤和环境条件的影响。描述了S0肥的一些新用途,如“种子膨胀”和病虫害的控制。植物养分硫具有良好的海外市场机遇,但高运费、高包装费用、产品在海运途中的破碎,可能使其缺乏可接受性。解决的方法是在有S0资源的当地建立结构紧凑的模块式造粒装置。
Cites the use of sulfur fertilizers in China, India, Argentina and Brazil. A large number of field trials have shown that SO42- or S0 particulate sulfur fertilizer can significantly increase crop yields. Compare the advantages and disadvantages of these two types of sulfur fertilizer. SO42- is a quick-acting sulfur fertilizer that is readily absorbed by the crop but prone to leaching losses. SO must be micro-organisms oxidized to SO42- to be absorbed by the crop, as it is a gradual process, so the loss of leaching is very small; In addition S0 products have good after-season crop effect, which double cropping and a or The rotation of many crops is important. The conversion of S0 to SO42- forms that are readily absorbed by plants is affected by soil and environmental conditions. Some new uses of S0 fertilizer are described, such as “seed expansion” and pest control. Plant nutrient sulfur has good overseas market opportunities, but high shipping costs, high packaging costs, and fragmentation of products on the way to shipping may make them less acceptable. The solution is to build a compact, modular pelletizing unit locally with S0 resources.