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发育于凝灰岩和冲积物的水稻土施用氮、硫肥的田间试验结果表明 :(1)油菜施硫在高氮(2 0 0kg/hm2 )下使籽粒产量增加了 12 .7% ,水稻施硫在低氮 (10 0kg/hm2 )下使稻谷产量增加 6 .9% ;(2 )在高氮条件下施用不同硫源对水稻无明显增产作用 ,对油菜的增产作用硫磺和S95大于石膏 ;(3)施用硫肥增加了油菜和水稻的N和S吸收量 ,并提高了它们的氮肥利用率
The results of field experiments on application of nitrogen and sulfur fertilizer to paddy soil with tuff and alluvium showed that: (1) Rapeseed application increased the grain yield by 12.7% under high nitrogen (200 kg / hm2) Under low nitrogen (100 kg / hm2), the grain yield increased by 6.9%; (2) No significant increase in yield of rice was observed under different nitrogen sources; the yield of sulfur and S95 to rape was higher than that of gypsum; 3) Application of sulfur fertilizer increased N and S uptake by rapeseed and rice, and increased their N use efficiency