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为研究硫对水稻产量的影响，确定缺硫诊断指标，进行了水培和大田试验。结果：①施硫可提高水稻有效穗、结实率和千粒重，产量较缺硫处理有极显著的增加；有效硫含量中等的沙质田，硫肥（石膏）用量以含纯Ｓ１５ｋｇ／ｈｍ２为宜。②不同生育期缺硫对水稻产量的影响不同，分蘖期缺硫对产量影响最大，其次是苗期和抽穗期，生产上硫肥宜作基肥施用。③水稻缺硫诊断的适宜部位是叶片，分蘖期水稻硫素营养诊断的临界值是：硫酸盐硫（Ｓ）１９０μｇ／ｇ，全硫（Ｓ）０．１１％；Ｎ／Ｓ比值３１。
In order to study the effect of sulfur on the yield of rice and to determine the diagnostic index of sulfur deficiency, hydroponic and field experiments were carried out. Results: ①Sulfur application increased the effective spike, seed setting rate and 1000-grain weight of rice, and the yield was significantly increased compared with that of sulfur deficiency treatment. The content of sandy soil and sulfur fertilizer (gypsum) with effective sulfur content was pure S15kg / hm2 . ② The effect of sulfur deficiency on rice yield at different growth stages is different, tillering stage sulfur deficiency has the greatest impact on the yield, followed by the seedling stage and heading stage, the production of sulfur fertilizer should be used as basal fertilizer. (3) The suitable sites for the diagnosis of sulfur deficiency in rice are leaves. The critical values for the diagnosis of sulfur nutrition at the tillering stage are: sulfur sulfate (S) 190μg / g, total sulfur (S) 0.11% and N / S ratio 31.