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1975年开始在湖南祁阳红壤站布置了含硫化肥长期定位试验。3个处理(无硫、低硫和高硫)的施硫量分别为0、112、604 kg hm-2a-1。结果表明:SO42-—S在施硫处理的土壤和植株中都有明显的累积,连续施用含硫化肥24年后,表土中SO42-—S含量增加了158~229%,施硫处理稻草中硫浓度比对照高43~57%,而稻谷中硫浓度在处理问无显著差异;施硫对水稻的短期效应(1~7年)为提高产量和品质,中期效应(8~15年)为无显著作用,而长期效应(16年后)为负面影响,长期施用含硫化肥导致水稻(特别是晚稻)对Mg、Fe、B、Mo等元素的吸收量显著减少,并使高硫处理晚稻稻谷产量显著下降(1990~1997年比1982~1989年平均下降31.6%)。
Since 1975, a long-term positioning test of sulfur-containing fertilizers has been arranged in red soil stations in Qiyang, Hunan. The sulfur content of the three treatments (sulfur-free, sulfur-free and sulfur-rich) were 0,112,604 kg hm-2a-1 respectively. The results showed that SO42 - S accumulated obviously in soil and plants treated with sulfur fertilizer. SO42 - S content in surface soil increased 158 ~ 229% after 24 years of continuous application of sulfur fertilizer, Sulfur concentration was 43-57% higher than that of the control, while there was no significant difference in the sulfur concentration in rice between treatment and treatment. The short-term effect of applying sulfur on rice (1-7 years) was to increase the yield and quality. The medium-term effect (8-15 years) Long-term effect (after 16 years) is negative. Long-term application of sulfur-containing fertilizers resulted in a significant decrease in the uptake of Mg, Fe, B, Mo and other elements in rice, especially in late rice, Rice production decreased significantly (from 1990 to 1997, an average decrease of 31.6% from 1982 to 1989).