不同硫肥水平对水稻产量和品质的影响

以空育131为试验材料,对比研究不同硫肥水平对水稻生长、产量及品质的影响,结果表明:水稻增施硫肥可增加产量,平均增幅6.8%～11.4%,其中施硫肥3 kg/667 m2水稻产量最高。同时施硫肥3 kg/667 m2也可促进水稻株高、平方米有效穗数、穗长、穗粒数、千粒重的提高。而增施硫肥4.5 kg/667 m2时,产量没有继续增加;在1.5～3 kg/667 m2时可提高水稻的糙米率、精米率、整精米率,而在1.5 kg/667 m2时研磨品质较好;各硫肥处理也降低稻米碎米率和垩白米率,提高了水稻的外观品质。水稻适度增施硫肥可加快水稻返青、分蘖、抽穗和成熟,比对照提前1～2 d;增加株高,提高分蘖率;同时也可增加水稻叶面积指数、叶绿素含量,促进干物质的积累。

Effect of Different Levels of Sulfur Fertilizer on Yield and Quality of Rice

Study on effects of different sulfur fertilizers on rice growth,yields and qualities of Kongyu131.The results showed that the yield of rice increased with increasing sulfur fertilizer,the mean range of 6.8%-11.4%,and the highest yield was added 3 kg/667 m2 sulfur fertilizer whilst inducing rice height,effective ear of square meter,ear length,grain number per spike and 1000-kernel weight.However,the 4.5 kg/667 m2 sulfur fertilizer’s yield was not continue rising.It was increasing the brown rice rate,milled rice rate and head rice rate between 1.5 kg/667 m2 to 3 kg/667 m2,and then the grinding quantity of 1.5 kg/667 m2 was better.Each sulfur fertilizer treatment decreased the broken rice rate and chalky rice rate,but improved the appearance quality of rice.The rice which modestly applied sulfur fertilizer could hasten rice turning green,tillering,heading and ripening,it was earlier 1 to 2 days than control.In addition,it could elevate the rice height and tillering rate,whilst increase leaf area index and chlorophyll content,promote biomass accumulation.