论文部分内容阅读
研究了进行 15年的不同施肥结构对红壤稻田土壤硫素肥力演变和对土壤供硫能力的影响。结果表明 ,不同施肥结构明显影响土壤全硫、有机硫、无机硫和供硫潜力 (无机硫加部分有机硫 ,4 0℃KCl浸提 )的演变时间进程以及土壤有机硫的潜在矿化量、矿化常数和矿化半减期 ,稻草还田和有机肥施用有利于土壤硫的积累 ,提高土壤供硫能力 ;连续盆栽幼苗试验结果表明 ,作物吸硫量以稻草还田区 >有机肥加化肥区 >全化肥区 >无肥区 ,与土壤全硫、供硫潜力及土壤硫潜在矿化量顺序一致
The effects of 15 years of fertilization on the evolution of soil sulfur fertility and soil sulfur availability in red paddy soil were studied. The results showed that different fertilization structures significantly affected the evolution of soil total sulfur, organic sulfur, inorganic sulfur and sulfur potential (inorganic sulfur plus partial organic sulfur, KCl at 40 ℃) and the potential mineralization of soil organic sulfur. Chemical constant and mineralization half-dead period, straw returning and organic manure application are beneficial to soil sulfur accumulation and soil sulfur supply capacity. The results of continuous potted seedling experiment show that the amount of sulfur absorbed by crops is in the field of straw> organic fertilizer and chemical fertilizer Area> total fertilizer area> no-fertilizer area, in the same order as soil total sulfur, sulfur potential and potential mineralization of soil sulfur